Class Image

Wrap a NetVips.Internal.VipsImage object.

Inheritance

System.Object

System.Runtime.ConstrainedExecution.CriticalFinalizerObject

System.Runtime.InteropServices.SafeHandle

GObject

VipsObject

Image

Implements

System.IDisposable

Inherited Members

VipsObject.SetString(String)

VipsObject.GetDescription()

GObject.ReleaseHandle()

GObject.IsInvalid

System.Runtime.InteropServices.SafeHandle.handle

System.Runtime.InteropServices.SafeHandle.Close()

System.Runtime.InteropServices.SafeHandle.DangerousAddRef(System.Boolean)

System.Runtime.InteropServices.SafeHandle.DangerousGetHandle()

System.Runtime.InteropServices.SafeHandle.DangerousRelease()

System.Runtime.InteropServices.SafeHandle.Dispose()

System.Runtime.InteropServices.SafeHandle.SetHandle(System.IntPtr)

System.Runtime.InteropServices.SafeHandle.SetHandleAsInvalid()

System.Runtime.InteropServices.SafeHandle.IsClosed

System.Object.Equals(System.Object, System.Object)

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

Namespace: NetVips

Assembly: NetVips.dll

Syntax

public sealed class Image : VipsObject, IDisposable

Properties

Bands

Number of bands in image

Declaration

public int Bands { get; }

Property Value

Type	Description
System.Int32

Coding

Pixel coding

Declaration

public string Coding { get; }

Property Value

Type	Description
System.String

Filename

Image filename

Declaration

public string Filename { get; }

Property Value

Type	Description
System.String

Format

Pixel format in image

Declaration

public string Format { get; }

Property Value

Type	Description
System.String

Height

Image height in pixels

Declaration

public int Height { get; }

Property Value

Type	Description
System.Int32

Interpretation

Pixel interpretation

Declaration

public string Interpretation { get; }

Property Value

Type	Description
System.String

Item[Int32]

Overload []

Declaration

public Image this[int i] { get; set; }

Parameters

Type	Name	Description
System.Int32	i

Property Value

Type	Description
Image	A new Image

Remarks

Use [] to pull out band elements from an image. For example:

var green = rgbImage[1];

Will make a new one-band image from band 1 (the middle band).

Width

Image width in pixels

Declaration

public int Width { get; }

Property Value

Type	Description
System.Int32

Xoffset

Horizontal offset of origin

Declaration

public int Xoffset { get; }

Property Value

Type	Description
System.Int32

Xres

Horizontal resolution in pixels/mm

Declaration

public double Xres { get; }

Property Value

Type	Description
System.Double

Yoffset

Vertical offset of origin

Declaration

public int Yoffset { get; }

Property Value

Type	Description
System.Int32

Yres

Vertical resolution in pixels/mm

Declaration

public double Yres { get; }

Property Value

Type	Description
System.Double

Methods

Abs()

Absolute value of an image

Declaration

public Image Abs()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Abs();

Acos()

Return the inverse cosine of an image in degrees.

Declaration

public Image Acos()

Returns

Type	Description
Image	A new Image

Add(Image)

Add two images

Declaration

public Image Add(Image right)

Parameters

Type	Name	Description
Image	right	Right-hand image argument

Returns

Type	Description
Image	A new Image

Examples

Image @out = left.Add(right);

Affine(Double[], GObject, Int32[], Nullable<Double>, Nullable<Double>, Nullable<Double>, Nullable<Double>, Double[], String)

Affine transform of an image

Declaration

public Image Affine(double[] matrix, GObject interpolate = null, int[] oarea = null, double? odx = default(double? ), double? ody = default(double? ), double? idx = default(double? ), double? idy = default(double? ), double[] background = null, string extend = null)

Parameters

Type	Name	Description
System.Double[]	matrix	Transformation matrix
GObject	interpolate	Interpolate pixels with this
System.Int32[]	oarea	Area of output to generate
System.Nullable<System.Double>	odx	Horizontal output displacement
System.Nullable<System.Double>	ody	Vertical output displacement
System.Nullable<System.Double>	idx	Horizontal input displacement
System.Nullable<System.Double>	idy	Vertical input displacement
System.Double[]	background	Background value
System.String	extend	How to generate the extra pixels

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Affine(matrix, interpolate: GObject, oarea: int[], odx: double, ody: double, idx: double, idy: double, background: double[], extend: string);

Analyzeload(String, out Int32, Nullable<Boolean>, String, Nullable<Boolean>)

Load an Analyze6 image

Declaration

public static Image Analyzeload(string filename, out int flags, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Analyzeload(filename, out var flags, memory: bool, access: string, fail: bool);

Analyzeload(String, Nullable<Boolean>, String, Nullable<Boolean>)

Load an Analyze6 image

Declaration

public static Image Analyzeload(string filename, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Analyzeload(filename, memory: bool, access: string, fail: bool);

Arrayjoin(Image[], Nullable<Int32>, Nullable<Int32>, Double[], String, String, Nullable<Int32>, Nullable<Int32>)

Join an array of images

Declaration

public static Image Arrayjoin(Image[] in, int? across = default(int? ), int? shim = default(int? ), double[] background = null, string halign = null, string valign = null, int? hspacing = default(int? ), int? vspacing = default(int? ))

Parameters

Type	Name	Description
Image[]	in	Array of input images
System.Nullable<System.Int32>	across	Number of images across grid
System.Nullable<System.Int32>	shim	Pixels between images
System.Double[]	background	Colour for new pixels
System.String	halign	Align on the left, centre or right
System.String	valign	Align on the top, centre or bottom
System.Nullable<System.Int32>	hspacing	Horizontal spacing between images
System.Nullable<System.Int32>	vspacing	Vertical spacing between images

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Arrayjoin(@in, across: int, shim: int, background: double[], halign: string, valign: string, hspacing: int, vspacing: int);

Asin()

Return the inverse sine of an image in degrees.

Declaration

public Image Asin()

Returns

Type	Description
Image	A new Image

Atan()

Return the inverse tangent of an image in degrees.

Declaration

public Image Atan()

Returns

Type	Description
Image	A new Image

Autorot()

Autorotate image by exif tag

Declaration

public Image Autorot()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Autorot();

Autorot(out String)

Autorotate image by exif tag

Declaration

public Image Autorot(out string angle)

Parameters

Type	Name	Description
System.String	angle	Angle image was rotated by

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Autorot(out var angle);

Avg()

Find image average

Declaration

public double Avg()

Returns

Type	Description
System.Double	A double

Examples

double @out = in.Avg();

BandAnd()

AND image bands together.

Declaration

public Image BandAnd()

Returns

Type	Description
Image	A new Image

Bandbool(String)

Boolean operation across image bands

Declaration

public Image Bandbool(string boolean)

Parameters

Type	Name	Description
System.String	boolean	boolean to perform

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Bandbool(boolean);

BandEor()

EOR image bands together.

Declaration

public Image BandEor()

Returns

Type	Description
Image	A new Image

BandExists(Int32)

Does band exist in image.

Declaration

public bool BandExists(int i)

Parameters

Type	Name	Description
System.Int32	i	The index to fetch.

Returns

Type	Description
System.Boolean	true if the index exists

Bandfold(Nullable<Int32>)

Fold up x axis into bands

Declaration

public Image Bandfold(int? factor = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	factor	Fold by this factor

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Bandfold(factor: int);

Bandjoin(Object)

Append a set of images or constants bandwise.

Declaration

public Image Bandjoin(object other)

Parameters

Type	Name	Description
System.Object	other	Array of input images

Returns

Type	Description
Image	A new Image

Examples

Image @out = image.Bandjoin(other);

BandjoinConst(Double[])

Append a constant band to an image

Declaration

public Image BandjoinConst(double[] c)

Parameters

Type	Name	Description
System.Double[]	c	Array of constants to add

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.BandjoinConst(c);

Bandmean()

Band-wise average

Declaration

public Image Bandmean()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Bandmean();

BandOr()

OR image bands together.

Declaration

public Image BandOr()

Returns

Type	Description
Image	A new Image

Bandrank(Object, Nullable<Int32>)

Band-wise rank of a set of images

Declaration

public Image Bandrank(object other, int? index = default(int? ))

Parameters

Type	Name	Description
System.Object	other	Array of input images
System.Nullable<System.Int32>	index	Select this band element from sorted list

Returns

Type	Description
Image	A new Image

Examples

Image @out = image.Bandrank(other, index: int);

Bandsplit()

Split an n-band image into n separate images.

Declaration

public Image[] Bandsplit()

Returns

Type	Description
Image[]	An array of Image

Bandunfold(Nullable<Int32>)

Unfold image bands into x axis

Declaration

public Image Bandunfold(int? factor = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	factor	Unfold by this factor

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Bandunfold(factor: int);

Black(Int32, Int32, Nullable<Int32>)

Make a black image

Declaration

public static Image Black(int width, int height, int? bands = default(int? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Nullable<System.Int32>	bands	Number of bands in image

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Black(width, height, bands: int);

Boolean(Image, String)

Boolean operation on two images

Declaration

public Image Boolean(Image right, string boolean)

Parameters

Type	Name	Description
Image	right	Right-hand image argument
System.String	boolean	boolean to perform

Returns

Type	Description
Image	A new Image

Examples

Image @out = left.Boolean(right, boolean);

BooleanConst(String, Double[])

Boolean operations against a constant

Declaration

public Image BooleanConst(string boolean, double[] c)

Parameters

Type	Name	Description
System.String	boolean	boolean to perform
System.Double[]	c	Array of constants

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.BooleanConst(boolean, c);

Buildlut()

Build a look-up table

Declaration

public Image Buildlut()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Buildlut();

Byteswap()

Byteswap an image

Declaration

public Image Byteswap()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Byteswap();

Cache(Nullable<Int32>, Nullable<Int32>, Nullable<Int32>)

Cache an image

Declaration

public Image Cache(int? maxTiles = default(int? ), int? tileHeight = default(int? ), int? tileWidth = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	maxTiles	Maximum number of tiles to cache
System.Nullable<System.Int32>	tileHeight	Tile height in pixels
System.Nullable<System.Int32>	tileWidth	Tile width in pixels

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Cache(maxTiles: int, tileHeight: int, tileWidth: int);

CallEnum(Object, Object, String, String)

Handy for the overloadable operators. A vips operator like 'more', but if the arg is not an image (ie. it's a constant), call 'more_const' instead.

Declaration

public static object CallEnum(object image, object other, string operationName, string operation)

Parameters

Type	Name	Description
System.Object	image	The left-hand argument.
System.Object	other	The right-hand argument.
System.String	operationName	The base part of the operation name.
System.String	operation	The operation to call.

Returns

Type	Description
System.Object

Canny(Nullable<Double>, String)

Canny edge detector

Declaration

public Image Canny(double? sigma = default(double? ), string precision = null)

Parameters

Type	Name	Description
System.Nullable<System.Double>	sigma	Sigma of Gaussian
System.String	precision	Convolve with this precision

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Canny(sigma: double, precision: string);

Cast(String, Nullable<Boolean>)

Cast an image

Declaration

public Image Cast(string format, bool? shift = default(bool? ))

Parameters

Type	Name	Description
System.String	format	Format to cast to
System.Nullable<System.Boolean>	shift	Shift integer values up and down

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Cast(format, shift: bool);

Ceil()

Return the largest integral value not greater than the argument.

Declaration

public Image Ceil()

Returns

Type	Description
Image	A new Image

CMC2LCh()

Transform LCh to CMC

Declaration

public Image CMC2LCh()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.CMC2LCh();

Colourspace(String, String)

Convert to a new colorspace

Declaration

public Image Colourspace(string space, string sourceSpace = null)

Parameters

Type	Name	Description
System.String	space	Destination color space
System.String	sourceSpace	Source color space

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Colourspace(space, sourceSpace: string);

Compass(Image, Nullable<Int32>, String, String, String, Nullable<Int32>, Nullable<Int32>)

Convolve with rotating mask

Declaration

public Image Compass(Image mask, int? times = default(int? ), string angle = null, string combine = null, string precision = null, int? layers = default(int? ), int? cluster = default(int? ))

Parameters

Type	Name	Description
Image	mask	Input matrix image
System.Nullable<System.Int32>	times	Rotate and convolve this many times
System.String	angle	Rotate mask by this much between convolutions
System.String	combine	Combine convolution results like this
System.String	precision	Convolve with this precision
System.Nullable<System.Int32>	layers	Use this many layers in approximation
System.Nullable<System.Int32>	cluster	Cluster lines closer than this in approximation

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Compass(mask, times: int, angle: string, combine: string, precision: string, layers: int, cluster: int);

Complex(String)

Perform a complex operation on an image

Declaration

public Image Complex(string cmplx)

Parameters

Type	Name	Description
System.String	cmplx	complex to perform

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Complex(cmplx);

Complex2(Image, String)

Complex binary operations on two images

Declaration

public Image Complex2(Image right, string cmplx)

Parameters

Type	Name	Description
Image	right	Right-hand image argument
System.String	cmplx	binary complex operation to perform

Returns

Type	Description
Image	A new Image

Examples

Image @out = left.Complex2(right, cmplx);

Complexform(Image)

Form a complex image from two real images

Declaration

public Image Complexform(Image right)

Parameters

Type	Name	Description
Image	right	Right-hand image argument

Returns

Type	Description
Image	A new Image

Examples

Image @out = left.Complexform(right);

Complexget(String)

Get a component from a complex image

Declaration

public Image Complexget(string get)

Parameters

Type	Name	Description
System.String	get	complex to perform

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Complexget(get);

Composite(Object, Object, String, Nullable<Boolean>)

Blend an array of images with an array of blend modes

Declaration

public Image Composite(object other, object mode, string compositingSpace = null, bool? premultiplied = default(bool? ))

Parameters

Type	Name	Description
System.Object	other	Array of input images
System.Object	mode	Array of VipsBlendMode to join with
System.String	compositingSpace	Composite images in this colour space
System.Nullable<System.Boolean>	premultiplied	Images have premultiplied alpha

Returns

Type	Description
Image	A new Image

Examples

Image @out = image.Composite(other, mode, compositingSpace: string, premultiplied: bool);

Composite2(Image, String, Nullable<Int32>, Nullable<Int32>, String, Nullable<Boolean>)

Blend a pair of images with a blend mode

Declaration

public Image Composite2(Image overlay, string mode, int? x = default(int? ), int? y = default(int? ), string compositingSpace = null, bool? premultiplied = default(bool? ))

Parameters

Type	Name	Description
Image	overlay	Overlay image
System.String	mode	VipsBlendMode to join with
System.Nullable<System.Int32>	x	x position of overlay
System.Nullable<System.Int32>	y	y position of overlay
System.String	compositingSpace	Composite images in this colour space
System.Nullable<System.Boolean>	premultiplied	Images have premultiplied alpha

Returns

Type	Description
Image	A new Image

Examples

Image @out = base.Composite2(overlay, mode, x: int, y: int, compositingSpace: string, premultiplied: bool);

Conj()

Return the complex conjugate of an image.

Declaration

public Image Conj()

Returns

Type	Description
Image	A new Image

Contains(String)

Check if the underlying image contains an property of metadata.

Declaration

public bool Contains(string name)

Parameters

Type	Name	Description
System.String	name	The name of the piece of metadata to check for.

Returns

Type	Description
System.Boolean	true if the metadata exits; otherwise, false

Conv(Image, String, Nullable<Int32>, Nullable<Int32>)

Convolution operation

Declaration

public Image Conv(Image mask, string precision = null, int? layers = default(int? ), int? cluster = default(int? ))

Parameters

Type	Name	Description
Image	mask	Input matrix image
System.String	precision	Convolve with this precision
System.Nullable<System.Int32>	layers	Use this many layers in approximation
System.Nullable<System.Int32>	cluster	Cluster lines closer than this in approximation

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Conv(mask, precision: string, layers: int, cluster: int);

Conva(Image, Nullable<Int32>, Nullable<Int32>)

Approximate integer convolution

Declaration

public Image Conva(Image mask, int? layers = default(int? ), int? cluster = default(int? ))

Parameters

Type	Name	Description
Image	mask	Input matrix image
System.Nullable<System.Int32>	layers	Use this many layers in approximation
System.Nullable<System.Int32>	cluster	Cluster lines closer than this in approximation

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Conva(mask, layers: int, cluster: int);

Convasep(Image, Nullable<Int32>)

Approximate separable integer convolution

Declaration

public Image Convasep(Image mask, int? layers = default(int? ))

Parameters

Type	Name	Description
Image	mask	Input matrix image
System.Nullable<System.Int32>	layers	Use this many layers in approximation

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Convasep(mask, layers: int);

Convf(Image)

Float convolution operation

Declaration

public Image Convf(Image mask)

Parameters

Type	Name	Description
Image	mask	Input matrix image

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Convf(mask);

Convi(Image)

Int convolution operation

Declaration

public Image Convi(Image mask)

Parameters

Type	Name	Description
Image	mask	Input matrix image

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Convi(mask);

Convsep(Image, String, Nullable<Int32>, Nullable<Int32>)

Seperable convolution operation

Declaration

public Image Convsep(Image mask, string precision = null, int? layers = default(int? ), int? cluster = default(int? ))

Parameters

Type	Name	Description
Image	mask	Input matrix image
System.String	precision	Convolve with this precision
System.Nullable<System.Int32>	layers	Use this many layers in approximation
System.Nullable<System.Int32>	cluster	Cluster lines closer than this in approximation

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Convsep(mask, precision: string, layers: int, cluster: int);

Copy(Nullable<Int32>, Nullable<Int32>, Nullable<Int32>, String, String, String, Nullable<Double>, Nullable<Double>, Nullable<Int32>, Nullable<Int32>)

Copy an image

Declaration

public Image Copy(int? width = default(int? ), int? height = default(int? ), int? bands = default(int? ), string format = null, string coding = null, string interpretation = null, double? xres = default(double? ), double? yres = default(double? ), int? xoffset = default(int? ), int? yoffset = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	width	Image width in pixels
System.Nullable<System.Int32>	height	Image height in pixels
System.Nullable<System.Int32>	bands	Number of bands in image
System.String	format	Pixel format in image
System.String	coding	Pixel coding
System.String	interpretation	Pixel interpretation
System.Nullable<System.Double>	xres	Horizontal resolution in pixels/mm
System.Nullable<System.Double>	yres	Vertical resolution in pixels/mm
System.Nullable<System.Int32>	xoffset	Horizontal offset of origin
System.Nullable<System.Int32>	yoffset	Vertical offset of origin

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Copy(width: int, height: int, bands: int, format: string, coding: string, interpretation: string, xres: double, yres: double, xoffset: int, yoffset: int);

CopyMemory()

Copy an image to memory.

Declaration

public Image CopyMemory()

Returns

Type	Description
Image	A new Image

Remarks

A large area of memory is allocated, the image is rendered to that memory area, and a new image is returned which wraps that large memory area.

Exceptions

Type	Condition
VipsException	If unable to copy to memory.

Cos()

Return the cosine of an image in degrees.

Declaration

public Image Cos()

Returns

Type	Description
Image	A new Image

Countlines(String)

Count lines in an image

Declaration

public double Countlines(string direction)

Parameters

Type	Name	Description
System.String	direction	Countlines left-right or up-down

Returns

Type	Description
System.Double	A double

Examples

double nolines = in.Countlines(direction);

Crop(Int32, Int32, Int32, Int32)

A synonym for ExtractArea(Int32, Int32, Int32, Int32).

Declaration

public Image Crop(int left, int top, int width, int height)

Parameters

Type	Name	Description
System.Int32	left	Left edge of extract area
System.Int32	top	Top edge of extract area
System.Int32	width	Width of extract area
System.Int32	height	Height of extract area

Returns

Type	Description
Image	A new Image

Examples

Image @out = input.Crop(left, top, width, height);

Csvload(String, out Int32, Nullable<Boolean>, String, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, String, String)

Load csv from file

Declaration

public static Image Csvload(string filename, out int flags, bool? memory = default(bool? ), string access = null, int? skip = default(int? ), int? lines = default(int? ), bool? fail = default(bool? ), string whitespace = null, string separator = null)

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	skip	Skip this many lines at the start of the file
System.Nullable<System.Int32>	lines	Read this many lines from the file
System.Nullable<System.Boolean>	fail	Fail on first error
System.String	whitespace	Set of whitespace characters
System.String	separator	Set of separator characters

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Csvload(filename, out var flags, memory: bool, access: string, skip: int, lines: int, fail: bool, whitespace: string, separator: string);

Csvload(String, Nullable<Boolean>, String, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, String, String)

Load csv from file

Declaration

public static Image Csvload(string filename, bool? memory = default(bool? ), string access = null, int? skip = default(int? ), int? lines = default(int? ), bool? fail = default(bool? ), string whitespace = null, string separator = null)

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	skip	Skip this many lines at the start of the file
System.Nullable<System.Int32>	lines	Read this many lines from the file
System.Nullable<System.Boolean>	fail	Fail on first error
System.String	whitespace	Set of whitespace characters
System.String	separator	Set of separator characters

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Csvload(filename, memory: bool, access: string, skip: int, lines: int, fail: bool, whitespace: string, separator: string);

Csvsave(String, Nullable<Int32>, String, Nullable<Boolean>, Double[])

Save image to csv file

Declaration

public void Csvsave(string filename, int? pageHeight = default(int? ), string separator = null, bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.String	filename	Filename to save to
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.String	separator	Separator characters
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Examples

in.Csvsave(filename, pageHeight: int, separator: string, strip: bool, background: double[]);

DE00(Image)

Calculate dE00

Declaration

public Image DE00(Image right)

Parameters

Type	Name	Description
Image	right	Right-hand input image

Returns

Type	Description
Image	A new Image

Examples

Image @out = left.DE00(right);

DE76(Image)

Calculate dE76

Declaration

public Image DE76(Image right)

Parameters

Type	Name	Description
Image	right	Right-hand input image

Returns

Type	Description
Image	A new Image

Examples

Image @out = left.DE76(right);

DECMC(Image)

Calculate dECMC

Declaration

public Image DECMC(Image right)

Parameters

Type	Name	Description
Image	right	Right-hand input image

Returns

Type	Description
Image	A new Image

Examples

Image @out = left.DECMC(right);

Deviate()

Find image standard deviation

Declaration

public double Deviate()

Returns

Type	Description
System.Double	A double

Examples

double @out = in.Deviate();

Dilate(Image)

Dilate with a structuring element.

Declaration

public Image Dilate(Image mask)

Parameters

Type	Name	Description
Image	mask

Returns

Type	Description
Image	A new Image

Dispose(Boolean)

Declaration

protected override void Dispose(bool disposing)

Parameters

Type	Name	Description
System.Boolean	disposing

Overrides

System.Runtime.InteropServices.SafeHandle.Dispose(System.Boolean)

Divide(Image)

Divide two images

Declaration

public Image Divide(Image right)

Parameters

Type	Name	Description
Image	right	Right-hand image argument

Returns

Type	Description
Image	A new Image

Examples

Image @out = left.Divide(right);

DrawCircle(Double[], Int32, Int32, Int32, Nullable<Boolean>)

Draw a circle on an image

Declaration

public Image DrawCircle(double[] ink, int cx, int cy, int radius, bool? fill = default(bool? ))

Parameters

Type	Name	Description
System.Double[]	ink	Color for pixels
System.Int32	cx	Centre of draw_circle
System.Int32	cy	Centre of draw_circle
System.Int32	radius	Radius in pixels
System.Nullable<System.Boolean>	fill	Draw a solid object

Returns

Type	Description
Image	A new Image

Examples

Image image = image.DrawCircle(ink, cx, cy, radius, fill: bool);

DrawFlood(Double[], Int32, Int32, Image, Nullable<Boolean>)

Flood-fill an area

Declaration

public Image DrawFlood(double[] ink, int x, int y, Image test = null, bool? equal = default(bool? ))

Parameters

Type	Name	Description
System.Double[]	ink	Color for pixels
System.Int32	x	DrawFlood start point
System.Int32	y	DrawFlood start point
Image	test	Test pixels in this image
System.Nullable<System.Boolean>	equal	DrawFlood while equal to edge

Returns

Type	Description
Image	A new Image

Examples

Image image = image.DrawFlood(ink, x, y, test: Image, equal: bool);

DrawFlood(Double[], Int32, Int32, out Int32, Image, Nullable<Boolean>)

Flood-fill an area

Declaration

public Image DrawFlood(double[] ink, int x, int y, out int left, Image test = null, bool? equal = default(bool? ))

Parameters

Type	Name	Description
System.Double[]	ink	Color for pixels
System.Int32	x	DrawFlood start point
System.Int32	y	DrawFlood start point
System.Int32	left	Left edge of modified area
Image	test	Test pixels in this image
System.Nullable<System.Boolean>	equal	DrawFlood while equal to edge

Returns

Type	Description
Image	A new Image

Examples

Image image = image.DrawFlood(ink, x, y, out var left, test: Image, equal: bool);

DrawFlood(Double[], Int32, Int32, out Int32, out Int32, Image, Nullable<Boolean>)

Flood-fill an area

Declaration

public Image DrawFlood(double[] ink, int x, int y, out int left, out int top, Image test = null, bool? equal = default(bool? ))

Parameters

Type	Name	Description
System.Double[]	ink	Color for pixels
System.Int32	x	DrawFlood start point
System.Int32	y	DrawFlood start point
System.Int32	left	Left edge of modified area
System.Int32	top	top edge of modified area
Image	test	Test pixels in this image
System.Nullable<System.Boolean>	equal	DrawFlood while equal to edge

Returns

Type	Description
Image	A new Image

Examples

Image image = image.DrawFlood(ink, x, y, out var left, out var top, test: Image, equal: bool);

DrawFlood(Double[], Int32, Int32, out Int32, out Int32, out Int32, Image, Nullable<Boolean>)

Flood-fill an area

Declaration

public Image DrawFlood(double[] ink, int x, int y, out int left, out int top, out int width, Image test = null, bool? equal = default(bool? ))

Parameters

Type	Name	Description
System.Double[]	ink	Color for pixels
System.Int32	x	DrawFlood start point
System.Int32	y	DrawFlood start point
System.Int32	left	Left edge of modified area
System.Int32	top	top edge of modified area
System.Int32	width	width of modified area
Image	test	Test pixels in this image
System.Nullable<System.Boolean>	equal	DrawFlood while equal to edge

Returns

Type	Description
Image	A new Image

Examples

Image image = image.DrawFlood(ink, x, y, out var left, out var top, out var width, test: Image, equal: bool);

DrawFlood(Double[], Int32, Int32, out Int32, out Int32, out Int32, out Int32, Image, Nullable<Boolean>)

Flood-fill an area

Declaration

public Image DrawFlood(double[] ink, int x, int y, out int left, out int top, out int width, out int height, Image test = null, bool? equal = default(bool? ))

Parameters

Type	Name	Description
System.Double[]	ink	Color for pixels
System.Int32	x	DrawFlood start point
System.Int32	y	DrawFlood start point
System.Int32	left	Left edge of modified area
System.Int32	top	top edge of modified area
System.Int32	width	width of modified area
System.Int32	height	height of modified area
Image	test	Test pixels in this image
System.Nullable<System.Boolean>	equal	DrawFlood while equal to edge

Returns

Type	Description
Image	A new Image

Examples

Image image = image.DrawFlood(ink, x, y, out var left, out var top, out var width, out var height, test: Image, equal: bool);

DrawImage(Image, Int32, Int32, String)

Paint an image into another image

Declaration

public Image DrawImage(Image sub, int x, int y, string mode = null)

Parameters

Type	Name	Description
Image	sub	Sub-image to insert into main image
System.Int32	x	Draw image here
System.Int32	y	Draw image here
System.String	mode	Combining mode

Returns

Type	Description
Image	A new Image

Examples

Image image = image.DrawImage(sub, x, y, mode: string);

DrawLine(Double[], Int32, Int32, Int32, Int32)

Draw a line on an image

Declaration

public Image DrawLine(double[] ink, int x1, int y1, int x2, int y2)

Parameters

Type	Name	Description
System.Double[]	ink	Color for pixels
System.Int32	x1	Start of draw_line
System.Int32	y1	Start of draw_line
System.Int32	x2	End of draw_line
System.Int32	y2	End of draw_line

Returns

Type	Description
Image	A new Image

Examples

Image image = image.DrawLine(ink, x1, y1, x2, y2);

DrawMask(Double[], Image, Int32, Int32)

Draw a mask on an image

Declaration

public Image DrawMask(double[] ink, Image mask, int x, int y)

Parameters

Type	Name	Description
System.Double[]	ink	Color for pixels
Image	mask	Mask of pixels to draw
System.Int32	x	Draw mask here
System.Int32	y	Draw mask here

Returns

Type	Description
Image	A new Image

Examples

Image image = image.DrawMask(ink, mask, x, y);

DrawRect(Double[], Int32, Int32, Int32, Int32, Nullable<Boolean>)

Paint a rectangle on an image

Declaration

public Image DrawRect(double[] ink, int left, int top, int width, int height, bool? fill = default(bool? ))

Parameters

Type	Name	Description
System.Double[]	ink	Color for pixels
System.Int32	left	Rect to fill
System.Int32	top	Rect to fill
System.Int32	width	Rect to fill
System.Int32	height	Rect to fill
System.Nullable<System.Boolean>	fill	Draw a solid object

Returns

Type	Description
Image	A new Image

Examples

Image image = image.DrawRect(ink, left, top, width, height, fill: bool);

DrawSmudge(Int32, Int32, Int32, Int32)

Blur a rectangle on an image

Declaration

public Image DrawSmudge(int left, int top, int width, int height)

Parameters

Type	Name	Description
System.Int32	left	Rect to fill
System.Int32	top	Rect to fill
System.Int32	width	Rect to fill
System.Int32	height	Rect to fill

Returns

Type	Description
Image	A new Image

Examples

Image image = image.DrawSmudge(left, top, width, height);

Dzsave(String, String, String, Nullable<Int32>, String, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, String, String, String, Nullable<Boolean>, Nullable<Int32>, String, Nullable<Boolean>, Double[])

Save image to deepzoom file

Declaration

public void Dzsave(string filename, string basename = null, string layout = null, int? pageHeight = default(int? ), string suffix = null, int? overlap = default(int? ), int? tileSize = default(int? ), bool? centre = default(bool? ), string depth = null, string angle = null, string container = null, bool? properties = default(bool? ), int? compression = default(int? ), string regionShrink = null, bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.String	filename	Filename to save to
System.String	basename	Base name to save to
System.String	layout	Directory layout
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.String	suffix	Filename suffix for tiles
System.Nullable<System.Int32>	overlap	Tile overlap in pixels
System.Nullable<System.Int32>	tileSize	Tile size in pixels
System.Nullable<System.Boolean>	centre	Center image in tile
System.String	depth	Pyramid depth
System.String	angle	Rotate image during save
System.String	container	Pyramid container type
System.Nullable<System.Boolean>	properties	Write a properties file to the output directory
System.Nullable<System.Int32>	compression	ZIP deflate compression level
System.String	regionShrink	Method to shrink regions
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Examples

in.Dzsave(filename, basename: string, layout: string, pageHeight: int, suffix: string, overlap: int, tileSize: int, centre: bool, depth: string, angle: string, container: string, properties: bool, compression: int, regionShrink: string, strip: bool, background: double[]);

DzsaveBuffer(String, String, Nullable<Int32>, String, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, String, String, String, Nullable<Boolean>, Nullable<Int32>, String, Nullable<Boolean>, Double[])

Save image to dz buffer

Declaration

public byte[] DzsaveBuffer(string basename = null, string layout = null, int? pageHeight = default(int? ), string suffix = null, int? overlap = default(int? ), int? tileSize = default(int? ), bool? centre = default(bool? ), string depth = null, string angle = null, string container = null, bool? properties = default(bool? ), int? compression = default(int? ), string regionShrink = null, bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.String	basename	Base name to save to
System.String	layout	Directory layout
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.String	suffix	Filename suffix for tiles
System.Nullable<System.Int32>	overlap	Tile overlap in pixels
System.Nullable<System.Int32>	tileSize	Tile size in pixels
System.Nullable<System.Boolean>	centre	Center image in tile
System.String	depth	Pyramid depth
System.String	angle	Rotate image during save
System.String	container	Pyramid container type
System.Nullable<System.Boolean>	properties	Write a properties file to the output directory
System.Nullable<System.Int32>	compression	ZIP deflate compression level
System.String	regionShrink	Method to shrink regions
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Returns

Type	Description
System.Byte[]	An array of bytes

Examples

byte[] buffer = in.DzsaveBuffer(basename: string, layout: string, pageHeight: int, suffix: string, overlap: int, tileSize: int, centre: bool, depth: string, angle: string, container: string, properties: bool, compression: int, regionShrink: string, strip: bool, background: double[]);

Embed(Int32, Int32, Int32, Int32, String, Double[])

Embed an image in a larger image

Declaration

public Image Embed(int x, int y, int width, int height, string extend = null, double[] background = null)

Parameters

Type	Name	Description
System.Int32	x	Left edge of input in output
System.Int32	y	Top edge of input in output
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.String	extend	How to generate the extra pixels
System.Double[]	background	Color for background pixels

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Embed(x, y, width, height, extend: string, background: double[]);

Equals(Image)

Compares the hashcode of two images.

Declaration

public bool Equals(Image other)

Parameters

Type	Name	Description
Image	other	The Image to compare.

Returns

Type	Description
System.Boolean	true if equal; otherwise, false

Equals(Object)

Determines whether the specified object is equal to the current image.

Declaration

public override bool Equals(object obj)

Parameters

Type	Name	Description
System.Object	obj	The object to compare with the current image.

Returns

Type	Description
System.Boolean	true if the specified object is equal to the current image; otherwise, false.

Overrides

System.Object.Equals(System.Object)

Erode(Image)

Erode with a structuring element.

Declaration

public Image Erode(Image mask)

Parameters

Type	Name	Description
Image	mask

Returns

Type	Description
Image	A new Image

Exp()

Return e ** pixel.

Declaration

public Image Exp()

Returns

Type	Description
Image	A new Image

Exp10()

Return 10 ** pixel.

Declaration

public Image Exp10()

Returns

Type	Description
Image	A new Image

ExtractArea(Int32, Int32, Int32, Int32)

Extract an area from an image

Declaration

public Image ExtractArea(int left, int top, int width, int height)

Parameters

Type	Name	Description
System.Int32	left	Left edge of extract area
System.Int32	top	Top edge of extract area
System.Int32	width	Width of extract area
System.Int32	height	Height of extract area

Returns

Type	Description
Image	A new Image

Examples

Image @out = input.ExtractArea(left, top, width, height);

ExtractBand(Int32, Nullable<Int32>)

Extract band from an image

Declaration

public Image ExtractBand(int band, int? n = default(int? ))

Parameters

Type	Name	Description
System.Int32	band	Band to extract
System.Nullable<System.Int32>	n	Number of bands to extract

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.ExtractBand(band, n: int);

Eye(Int32, Int32, Nullable<Boolean>, Nullable<Double>)

Make an image showing the eye's spatial response

Declaration

public static Image Eye(int width, int height, bool? uchar = default(bool? ), double? factor = default(double? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Nullable<System.Boolean>	uchar	Output an unsigned char image
System.Nullable<System.Double>	factor	Maximum spatial frequency

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Eye(width, height, uchar: bool, factor: double);

Falsecolour()

False-color an image

Declaration

public Image Falsecolour()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Falsecolour();

Fastcor(Image)

Fast correlation

Declaration

public Image Fastcor(Image ref)

Parameters

Type	Name	Description
Image	ref	Input reference image

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Fastcor(@ref);

FillNearest()

Fill image zeros with nearest non-zero pixel

Declaration

public Image FillNearest()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.FillNearest();

FillNearest(out Image)

Fill image zeros with nearest non-zero pixel

Declaration

public Image FillNearest(out Image distance)

Parameters

Type	Name	Description
Image	distance	Distance to nearest non-zero pixel

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.FillNearest(out var distance);

FindTrim(Nullable<Double>, Double[])

Search an image for non-edge areas

Declaration

public object[] FindTrim(double? threshold = default(double? ), double[] background = null)

Parameters

Type	Name	Description
System.Nullable<System.Double>	threshold	Object threshold
System.Double[]	background	Color for background pixels

Returns

Type	Description
System.Object[]	An array of objects

Examples

var output = in.FindTrim(threshold: double, background: double[]);

Fitsload(String, out Int32, Nullable<Boolean>, String, Nullable<Boolean>)

Load a FITS image

Declaration

public static Image Fitsload(string filename, out int flags, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Fitsload(filename, out var flags, memory: bool, access: string, fail: bool);

Fitsload(String, Nullable<Boolean>, String, Nullable<Boolean>)

Load a FITS image

Declaration

public static Image Fitsload(string filename, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Fitsload(filename, memory: bool, access: string, fail: bool);

Fitssave(String, Nullable<Int32>, Nullable<Boolean>, Double[])

Save image to fits file

Declaration

public void Fitssave(string filename, int? pageHeight = default(int? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.String	filename	Filename to save to
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Examples

in.Fitssave(filename, pageHeight: int, strip: bool, background: double[]);

Flatten(Double[], Nullable<Double>)

Flatten alpha out of an image

Declaration

public Image Flatten(double[] background = null, double? maxAlpha = default(double? ))

Parameters

Type	Name	Description
System.Double[]	background	Background value
System.Nullable<System.Double>	maxAlpha	Maximum value of alpha channel

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Flatten(background: double[], maxAlpha: double);

Flip(String)

Flip an image

Declaration

public Image Flip(string direction)

Parameters

Type	Name	Description
System.String	direction	Direction to flip image

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Flip(direction);

FlipHor()

Flip horizontally.

Declaration

public Image FlipHor()

Returns

Type	Description
Image	A new Image

FlipVer()

Flip vertically.

Declaration

public Image FlipVer()

Returns

Type	Description
Image	A new Image

Float2rad()

Transform float RGB to Radiance coding

Declaration

public Image Float2rad()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Float2rad();

Floor()

Return the largest integral value not greater than the argument.

Declaration

public Image Floor()

Returns

Type	Description
Image	A new Image

Fractsurf(Int32, Int32, Double)

Make a fractal surface

Declaration

public static Image Fractsurf(int width, int height, double fractalDimension)

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Double	fractalDimension	Fractal dimension

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Fractsurf(width, height, fractalDimension);

Freqmult(Image)

Frequency-domain filtering

Declaration

public Image Freqmult(Image mask)

Parameters

Type	Name	Description
Image	mask	Input mask image

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Freqmult(mask);

Fwfft()

Forward FFT

Declaration

public Image Fwfft()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Fwfft();

Gamma(Nullable<Double>)

Gamma an image

Declaration

public Image Gamma(double? exponent = default(double? ))

Parameters

Type	Name	Description
System.Nullable<System.Double>	exponent	Gamma factor

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Gamma(exponent: double);

Gaussblur(Double, Nullable<Double>, String)

Gaussian blur

Declaration

public Image Gaussblur(double sigma, double? minAmpl = default(double? ), string precision = null)

Parameters

Type	Name	Description
System.Double	sigma	Sigma of Gaussian
System.Nullable<System.Double>	minAmpl	Minimum amplitude of Gaussian
System.String	precision	Convolve with this precision

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Gaussblur(sigma, minAmpl: double, precision: string);

Gaussmat(Double, Double, Nullable<Boolean>, String)

Make a gaussian image

Declaration

public static Image Gaussmat(double sigma, double minAmpl, bool? separable = default(bool? ), string precision = null)

Parameters

Type	Name	Description
System.Double	sigma	Sigma of Gaussian
System.Double	minAmpl	Minimum amplitude of Gaussian
System.Nullable<System.Boolean>	separable	Generate separable Gaussian
System.String	precision	Generate with this precision

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Gaussmat(sigma, minAmpl, separable: bool, precision: string);

Gaussnoise(Int32, Int32, Nullable<Double>, Nullable<Double>)

Make a gaussnoise image

Declaration

public static Image Gaussnoise(int width, int height, double? sigma = default(double? ), double? mean = default(double? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Nullable<System.Double>	sigma	Standard deviation of pixels in generated image
System.Nullable<System.Double>	mean	Mean of pixels in generated image

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Gaussnoise(width, height, sigma: double, mean: double);

Get(String)

Get an item of metadata.

Declaration

public override object Get(string name)

Parameters

Type	Name	Description
System.String	name	The name of the piece of metadata to get.

Returns

Type	Description
System.Object	The metadata item as a C# value

Overrides

VipsObject.Get(String)

Exceptions

Type	Condition
VipsException	If unable to get name.

GetFields()

Get a list of all the metadata fields on an image.

Declaration

public string[] GetFields()

Returns

Type	Description
System.String[]	An array of strings or null.

Remarks

At least libvips 8.5 is needed

GetHashCode()

Serves as the default hash function.

Declaration

public override int GetHashCode()

Returns

Type	Description
System.Int32	A hash code for the current immage.

Overrides

System.Object.GetHashCode()

Getpoint(Int32, Int32)

Read a point from an image

Declaration

public double[] Getpoint(int x, int y)

Parameters

Type	Name	Description
System.Int32	x	Point to read
System.Int32	y	Point to read

Returns

Type	Description
System.Double[]	An array of doubles

Examples

double[] outArray = in.Getpoint(x, y);

GetTypeOf(String)

Get the GType of an item of metadata.

Declaration

public override IntPtr GetTypeOf(string name)

Parameters

Type	Name	Description
System.String	name	The name of the piece of metadata to get the type of.

Returns

Type	Description
System.IntPtr	A new instance of System.IntPtr initialized to the GType or System.IntPtr.Zero if the property does not exist.

Overrides

VipsObject.GetTypeOf(String)

Remarks

Fetch the GType of a piece of metadata, or System.IntPtr.Zero if the named item does not exist. See GValue.

Gifload(String, out Int32, Nullable<Int32>, Nullable<Boolean>, String, Nullable<Int32>, Nullable<Boolean>)

Load GIF with giflib

Declaration

public static Image Gifload(string filename, out int flags, int? n = default(int? ), bool? memory = default(bool? ), string access = null, int? page = default(int? ), bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Int32>	n	Load this many pages
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	page	Load this page from the file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Gifload(filename, out var flags, n: int, memory: bool, access: string, page: int, fail: bool);

Gifload(String, Nullable<Int32>, Nullable<Boolean>, String, Nullable<Int32>, Nullable<Boolean>)

Load GIF with giflib

Declaration

public static Image Gifload(string filename, int? n = default(int? ), bool? memory = default(bool? ), string access = null, int? page = default(int? ), bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Nullable<System.Int32>	n	Load this many pages
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	page	Load this page from the file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Gifload(filename, n: int, memory: bool, access: string, page: int, fail: bool);

GifloadBuffer(Byte[], out Int32, Nullable<Int32>, Nullable<Boolean>, String, Nullable<Int32>, Nullable<Boolean>)

Load GIF with giflib

Declaration

public static Image GifloadBuffer(byte[] buffer, out int flags, int? n = default(int? ), bool? memory = default(bool? ), string access = null, int? page = default(int? ), bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.Byte[]	buffer	Buffer to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Int32>	n	Load this many pages
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	page	Load this page from the file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.GifloadBuffer(buffer, out var flags, n: int, memory: bool, access: string, page: int, fail: bool);

GifloadBuffer(Byte[], Nullable<Int32>, Nullable<Boolean>, String, Nullable<Int32>, Nullable<Boolean>)

Load GIF with giflib

Declaration

public static Image GifloadBuffer(byte[] buffer, int? n = default(int? ), bool? memory = default(bool? ), string access = null, int? page = default(int? ), bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.Byte[]	buffer	Buffer to load from
System.Nullable<System.Int32>	n	Load this many pages
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	page	Load this page from the file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.GifloadBuffer(buffer, n: int, memory: bool, access: string, page: int, fail: bool);

Globalbalance(Nullable<Double>, Nullable<Boolean>)

Global balance an image mosaic

Declaration

public Image Globalbalance(double? gamma = default(double? ), bool? intOutput = default(bool? ))

Parameters

Type	Name	Description
System.Nullable<System.Double>	gamma	Image gamma
System.Nullable<System.Boolean>	intOutput	Integer output

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Globalbalance(gamma: double, intOutput: bool);

Gravity(String, Int32, Int32, String, Double[])

Place an image within a larger image with a certain gravity

Declaration

public Image Gravity(string direction, int width, int height, string extend = null, double[] background = null)

Parameters

Type	Name	Description
System.String	direction	direction to place image within width/height
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.String	extend	How to generate the extra pixels
System.Double[]	background	Color for background pixels

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Gravity(direction, width, height, extend: string, background: double[]);

Grey(Int32, Int32, Nullable<Boolean>)

Make a grey ramp image

Declaration

public static Image Grey(int width, int height, bool? uchar = default(bool? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Nullable<System.Boolean>	uchar	Output an unsigned char image

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Grey(width, height, uchar: bool);

Grid(Int32, Int32, Int32)

Grid an image

Declaration

public Image Grid(int tileHeight, int across, int down)

Parameters

Type	Name	Description
System.Int32	tileHeight	chop into tiles this high
System.Int32	across	number of tiles across
System.Int32	down	number of tiles down

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Grid(tileHeight, across, down);

HasAlpha()

Does this image have an alpha channel?

Declaration

public bool HasAlpha()

Returns

Type	Description
System.Boolean	true if this image has an alpha channel; otherwise, false

Remarks

Uses colour space interpretation with number of channels to guess this.

HistCum()

Form cumulative histogram

Declaration

public Image HistCum()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.HistCum();

HistEntropy()

Estimate image entropy

Declaration

public double HistEntropy()

Returns

Type	Description
System.Double	A double

Examples

double @out = in.HistEntropy();

HistEqual(Nullable<Int32>)

Histogram equalisation

Declaration

public Image HistEqual(int? band = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	band	Equalise with this band

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.HistEqual(band: int);

HistFind(Nullable<Int32>)

Find image histogram

Declaration

public Image HistFind(int? band = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	band	Find histogram of band

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.HistFind(band: int);

HistFindIndexed(Image, String)

Find indexed image histogram

Declaration

public Image HistFindIndexed(Image index, string combine = null)

Parameters

Type	Name	Description
Image	index	Index image
System.String	combine	Combine bins like this

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.HistFindIndexed(index, combine: string);

HistFindNdim(Nullable<Int32>)

Find n-dimensional image histogram

Declaration

public Image HistFindNdim(int? bins = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	bins	Number of bins in each dimension

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.HistFindNdim(bins: int);

HistIsmonotonic()

Test for monotonicity

Declaration

public bool HistIsmonotonic()

Returns

Type	Description
System.Boolean	A bool

Examples

bool monotonic = in.HistIsmonotonic();

HistLocal(Int32, Int32, Nullable<Int32>)

Local histogram equalisation

Declaration

public Image HistLocal(int width, int height, int? maxSlope = default(int? ))

Parameters

Type	Name	Description
System.Int32	width	Window width in pixels
System.Int32	height	Window height in pixels
System.Nullable<System.Int32>	maxSlope	Maximum slope (CLAHE)

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.HistLocal(width, height, maxSlope: int);

HistMatch(Image)

Match two histograms

Declaration

public Image HistMatch(Image ref)

Parameters

Type	Name	Description
Image	ref	Reference histogram

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.HistMatch(@ref);

HistNorm()

Normalise histogram

Declaration

public Image HistNorm()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.HistNorm();

HistPlot()

Plot histogram

Declaration

public Image HistPlot()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.HistPlot();

HoughCircle(Nullable<Int32>, Nullable<Int32>, Nullable<Int32>)

Find hough circle transform

Declaration

public Image HoughCircle(int? scale = default(int? ), int? minRadius = default(int? ), int? maxRadius = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	scale	Scale down dimensions by this factor
System.Nullable<System.Int32>	minRadius	Smallest radius to search for
System.Nullable<System.Int32>	maxRadius	Largest radius to search for

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.HoughCircle(scale: int, minRadius: int, maxRadius: int);

HoughLine(Nullable<Int32>, Nullable<Int32>)

Find hough line transform

Declaration

public Image HoughLine(int? width = default(int? ), int? height = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	width	horizontal size of parameter space
System.Nullable<System.Int32>	height	Vertical size of parameter space

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.HoughLine(width: int, height: int);

HSV2sRGB()

Transform HSV to sRGB

Declaration

public Image HSV2sRGB()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.HSV2sRGB();

IccExport(String, String, String, Nullable<Int32>)

Output to device with ICC profile

Declaration

public Image IccExport(string pcs = null, string intent = null, string outputProfile = null, int? depth = default(int? ))

Parameters

Type	Name	Description
System.String	pcs	Set Profile Connection Space
System.String	intent	Rendering intent
System.String	outputProfile	Filename to load output profile from
System.Nullable<System.Int32>	depth	Output device space depth in bits

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.IccExport(pcs: string, intent: string, outputProfile: string, depth: int);

IccImport(String, String, Nullable<Boolean>, String)

Import from device with ICC profile

Declaration

public Image IccImport(string pcs = null, string intent = null, bool? embedded = default(bool? ), string inputProfile = null)

Parameters

Type	Name	Description
System.String	pcs	Set Profile Connection Space
System.String	intent	Rendering intent
System.Nullable<System.Boolean>	embedded	Use embedded input profile, if available
System.String	inputProfile	Filename to load input profile from

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.IccImport(pcs: string, intent: string, embedded: bool, inputProfile: string);

IccTransform(String, String, String, Nullable<Boolean>, String, Nullable<Int32>)

Transform between devices with ICC profiles

Declaration

public Image IccTransform(string outputProfile, string pcs = null, string intent = null, bool? embedded = default(bool? ), string inputProfile = null, int? depth = default(int? ))

Parameters

Type	Name	Description
System.String	outputProfile	Filename to load output profile from
System.String	pcs	Set Profile Connection Space
System.String	intent	Rendering intent
System.Nullable<System.Boolean>	embedded	Use embedded input profile, if available
System.String	inputProfile	Filename to load input profile from
System.Nullable<System.Int32>	depth	Output device space depth in bits

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.IccTransform(outputProfile, pcs: string, intent: string, embedded: bool, inputProfile: string, depth: int);

Identity(Nullable<Int32>, Nullable<Boolean>, Nullable<Int32>)

Make a 1D image where pixel values are indexes

Declaration

public static Image Identity(int? bands = default(int? ), bool? ushort = default(bool? ), int? size = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	bands	Number of bands in LUT
System.Nullable<System.Boolean>	ushort	Create a 16-bit LUT
System.Nullable<System.Int32>	size	Size of 16-bit LUT

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Identity(bands: int, @ushort: bool, size: int);

Ifthenelse(Object, Object, Nullable<Boolean>)

Ifthenelse an image

Declaration

public Image Ifthenelse(object in1, object in2, bool? blend = default(bool? ))

Parameters

Type	Name	Description
System.Object	in1	Source for TRUE pixels
System.Object	in2	Source for FALSE pixels
System.Nullable<System.Boolean>	blend	Blend smoothly between then and else parts

Returns

Type	Description
Image	A new Image

Examples

Image @out = cond.Ifthenelse(in1, in2, blend: bool);

Imag()

Return the imaginary part of a complex image.

Declaration

public Image Imag()

Returns

Type	Description
Image	A new Image

Imageize(Image, Object)

Turn a constant (eg. 1, "12", new[] {1, 2, 3}, new[] {new[] {1}}) into an image using matchImage as a guide.

Declaration

public static Image Imageize(Image matchImage, object value)

Parameters

Type	Name	Description
Image	matchImage
System.Object	value

Returns

Type	Description
Image	A new Image

Insert(Image, Int32, Int32, Nullable<Boolean>, Double[])

Insert image @sub into @main at @x, @y

Declaration

public Image Insert(Image sub, int x, int y, bool? expand = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
Image	sub	Sub-image to insert into main image
System.Int32	x	Left edge of sub in main
System.Int32	y	Top edge of sub in main
System.Nullable<System.Boolean>	expand	Expand output to hold all of both inputs
System.Double[]	background	Color for new pixels

Returns

Type	Description
Image	A new Image

Examples

Image @out = main.Insert(sub, x, y, expand: bool, background: double[]);

Invert()

Invert an image

Declaration

public Image Invert()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Invert();

Invertlut(Nullable<Int32>)

Build an inverted look-up table

Declaration

public Image Invertlut(int? size = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	size	LUT size to generate

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Invertlut(size: int);

Invfft(Nullable<Boolean>)

Inverse FFT

Declaration

public Image Invfft(bool? real = default(bool? ))

Parameters

Type	Name	Description
System.Nullable<System.Boolean>	real	Output only the real part of the transform

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Invfft(real: bool);

Join(Image, String, Nullable<Boolean>, Nullable<Int32>, Double[], String)

Join a pair of images

Declaration

public Image Join(Image in2, string direction, bool? expand = default(bool? ), int? shim = default(int? ), double[] background = null, string align = null)

Parameters

Type	Name	Description
Image	in2	Second input image
System.String	direction	Join left-right or up-down
System.Nullable<System.Boolean>	expand	Expand output to hold all of both inputs
System.Nullable<System.Int32>	shim	Pixels between images
System.Double[]	background	Colour for new pixels
System.String	align	Align on the low, centre or high coordinate edge

Returns

Type	Description
Image	A new Image

Examples

Image @out = in1.Join(in2, direction, expand: bool, shim: int, background: double[], align: string);

Jpegload(String, out Int32, Nullable<Boolean>, String, Nullable<Int32>, Nullable<Boolean>, Nullable<Boolean>)

Load jpeg from file

Declaration

public static Image Jpegload(string filename, out int flags, bool? memory = default(bool? ), string access = null, int? shrink = default(int? ), bool? fail = default(bool? ), bool? autorotate = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	shrink	Shrink factor on load
System.Nullable<System.Boolean>	fail	Fail on first error
System.Nullable<System.Boolean>	autorotate	Rotate image using exif orientation

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Jpegload(filename, out var flags, memory: bool, access: string, shrink: int, fail: bool, autorotate: bool);

Jpegload(String, Nullable<Boolean>, String, Nullable<Int32>, Nullable<Boolean>, Nullable<Boolean>)

Load jpeg from file

Declaration

public static Image Jpegload(string filename, bool? memory = default(bool? ), string access = null, int? shrink = default(int? ), bool? fail = default(bool? ), bool? autorotate = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	shrink	Shrink factor on load
System.Nullable<System.Boolean>	fail	Fail on first error
System.Nullable<System.Boolean>	autorotate	Rotate image using exif orientation

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Jpegload(filename, memory: bool, access: string, shrink: int, fail: bool, autorotate: bool);

JpegloadBuffer(Byte[], out Int32, Nullable<Boolean>, String, Nullable<Int32>, Nullable<Boolean>, Nullable<Boolean>)

Load jpeg from buffer

Declaration

public static Image JpegloadBuffer(byte[] buffer, out int flags, bool? memory = default(bool? ), string access = null, int? shrink = default(int? ), bool? fail = default(bool? ), bool? autorotate = default(bool? ))

Parameters

Type	Name	Description
System.Byte[]	buffer	Buffer to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	shrink	Shrink factor on load
System.Nullable<System.Boolean>	fail	Fail on first error
System.Nullable<System.Boolean>	autorotate	Rotate image using exif orientation

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.JpegloadBuffer(buffer, out var flags, memory: bool, access: string, shrink: int, fail: bool, autorotate: bool);

JpegloadBuffer(Byte[], Nullable<Boolean>, String, Nullable<Int32>, Nullable<Boolean>, Nullable<Boolean>)

Load jpeg from buffer

Declaration

public static Image JpegloadBuffer(byte[] buffer, bool? memory = default(bool? ), string access = null, int? shrink = default(int? ), bool? fail = default(bool? ), bool? autorotate = default(bool? ))

Parameters

Type	Name	Description
System.Byte[]	buffer	Buffer to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	shrink	Shrink factor on load
System.Nullable<System.Boolean>	fail	Fail on first error
System.Nullable<System.Boolean>	autorotate	Rotate image using exif orientation

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.JpegloadBuffer(buffer, memory: bool, access: string, shrink: int, fail: bool, autorotate: bool);

Jpegsave(String, Nullable<Int32>, Nullable<Int32>, String, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Int32>, Nullable<Boolean>, Double[])

Save image to jpeg file

Declaration

public void Jpegsave(string filename, int? pageHeight = default(int? ), int? q = default(int? ), string profile = null, bool? optimizeCoding = default(bool? ), bool? interlace = default(bool? ), bool? noSubsample = default(bool? ), bool? trellisQuant = default(bool? ), bool? overshootDeringing = default(bool? ), bool? optimizeScans = default(bool? ), int? quantTable = default(int? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.String	filename	Filename to save to
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.Nullable<System.Int32>	q	Q factor
System.String	profile	ICC profile to embed
System.Nullable<System.Boolean>	optimizeCoding	Compute optimal Huffman coding tables
System.Nullable<System.Boolean>	interlace	Generate an interlaced (progressive) jpeg
System.Nullable<System.Boolean>	noSubsample	Disable chroma subsample
System.Nullable<System.Boolean>	trellisQuant	Apply trellis quantisation to each 8x8 block
System.Nullable<System.Boolean>	overshootDeringing	Apply overshooting to samples with extreme values
System.Nullable<System.Boolean>	optimizeScans	Split the spectrum of DCT coefficients into separate scans
System.Nullable<System.Int32>	quantTable	Use predefined quantization table with given index
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Examples

in.Jpegsave(filename, pageHeight: int, q: int, profile: string, optimizeCoding: bool, interlace: bool, noSubsample: bool, trellisQuant: bool, overshootDeringing: bool, optimizeScans: bool, quantTable: int, strip: bool, background: double[]);

JpegsaveBuffer(Nullable<Int32>, Nullable<Int32>, String, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Int32>, Nullable<Boolean>, Double[])

Save image to jpeg buffer

Declaration

public byte[] JpegsaveBuffer(int? pageHeight = default(int? ), int? q = default(int? ), string profile = null, bool? optimizeCoding = default(bool? ), bool? interlace = default(bool? ), bool? noSubsample = default(bool? ), bool? trellisQuant = default(bool? ), bool? overshootDeringing = default(bool? ), bool? optimizeScans = default(bool? ), int? quantTable = default(int? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.Nullable<System.Int32>	q	Q factor
System.String	profile	ICC profile to embed
System.Nullable<System.Boolean>	optimizeCoding	Compute optimal Huffman coding tables
System.Nullable<System.Boolean>	interlace	Generate an interlaced (progressive) jpeg
System.Nullable<System.Boolean>	noSubsample	Disable chroma subsample
System.Nullable<System.Boolean>	trellisQuant	Apply trellis quantisation to each 8x8 block
System.Nullable<System.Boolean>	overshootDeringing	Apply overshooting to samples with extreme values
System.Nullable<System.Boolean>	optimizeScans	Split the spectrum of DCT coefficients into separate scans
System.Nullable<System.Int32>	quantTable	Use predefined quantization table with given index
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Returns

Type	Description
System.Byte[]	An array of bytes

Examples

byte[] buffer = in.JpegsaveBuffer(pageHeight: int, q: int, profile: string, optimizeCoding: bool, interlace: bool, noSubsample: bool, trellisQuant: bool, overshootDeringing: bool, optimizeScans: bool, quantTable: int, strip: bool, background: double[]);

JpegsaveMime(Nullable<Int32>, Nullable<Int32>, String, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Int32>, Nullable<Boolean>, Double[])

Save image to jpeg mime

Declaration

public void JpegsaveMime(int? pageHeight = default(int? ), int? q = default(int? ), string profile = null, bool? optimizeCoding = default(bool? ), bool? interlace = default(bool? ), bool? noSubsample = default(bool? ), bool? trellisQuant = default(bool? ), bool? overshootDeringing = default(bool? ), bool? optimizeScans = default(bool? ), int? quantTable = default(int? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.Nullable<System.Int32>	q	Q factor
System.String	profile	ICC profile to embed
System.Nullable<System.Boolean>	optimizeCoding	Compute optimal Huffman coding tables
System.Nullable<System.Boolean>	interlace	Generate an interlaced (progressive) jpeg
System.Nullable<System.Boolean>	noSubsample	Disable chroma subsample
System.Nullable<System.Boolean>	trellisQuant	Apply trellis quantisation to each 8x8 block
System.Nullable<System.Boolean>	overshootDeringing	Apply overshooting to samples with extreme values
System.Nullable<System.Boolean>	optimizeScans	Split the spectrum of DCT coefficients into separate scans
System.Nullable<System.Int32>	quantTable	Use predefined quantization table with given index
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Examples

in.JpegsaveMime(pageHeight: int, q: int, profile: string, optimizeCoding: bool, interlace: bool, noSubsample: bool, trellisQuant: bool, overshootDeringing: bool, optimizeScans: bool, quantTable: int, strip: bool, background: double[]);

Lab2LabQ()

Transform float Lab to LabQ coding

Declaration

public Image Lab2LabQ()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Lab2LabQ();

Lab2LabS()

Transform float Lab to signed short

Declaration

public Image Lab2LabS()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Lab2LabS();

Lab2LCh()

Transform Lab to LCh

Declaration

public Image Lab2LCh()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Lab2LCh();

Lab2XYZ(Double[])

Transform CIELAB to XYZ

Declaration

public Image Lab2XYZ(double[] temp = null)

Parameters

Type	Name	Description
System.Double[]	temp	Color temperature

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Lab2XYZ(temp: double[]);

Labelregions()

Label regions in an image

Declaration

public Image Labelregions()

Returns

Type	Description
Image	A new Image

Examples

Image mask = in.Labelregions();

Labelregions(out Int32)

Label regions in an image

Declaration

public Image Labelregions(out int segments)

Parameters

Type	Name	Description
System.Int32	segments	Number of discrete contigious regions

Returns

Type	Description
Image	A new Image

Examples

Image mask = in.Labelregions(out var segments);

LabQ2Lab()

Unpack a LabQ image to float Lab

Declaration

public Image LabQ2Lab()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.LabQ2Lab();

LabQ2LabS()

Unpack a LabQ image to short Lab

Declaration

public Image LabQ2LabS()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.LabQ2LabS();

LabQ2sRGB()

Convert a LabQ image to sRGB

Declaration

public Image LabQ2sRGB()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.LabQ2sRGB();

LabS2Lab()

Transform signed short Lab to float

Declaration

public Image LabS2Lab()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.LabS2Lab();

LabS2LabQ()

Transform short Lab to LabQ coding

Declaration

public Image LabS2LabQ()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.LabS2LabQ();

LCh2CMC()

Transform LCh to CMC

Declaration

public Image LCh2CMC()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.LCh2CMC();

LCh2Lab()

Transform LCh to Lab

Declaration

public Image LCh2Lab()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.LCh2Lab();

Linear(Double[], Double[], Nullable<Boolean>)

Calculate (a * in + b)

Declaration

public Image Linear(double[] a, double[] b, bool? uchar = default(bool? ))

Parameters

Type	Name	Description
System.Double[]	a	Multiply by this
System.Double[]	b	Add this
System.Nullable<System.Boolean>	uchar	Output should be uchar

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Linear(a, b, uchar: bool);

Linecache(Nullable<Int32>, String, Nullable<Boolean>, Nullable<Boolean>)

Cache an image as a set of lines

Declaration

public Image Linecache(int? tileHeight = default(int? ), string access = null, bool? threaded = default(bool? ), bool? persistent = default(bool? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	tileHeight	Tile height in pixels
System.String	access	Expected access pattern
System.Nullable<System.Boolean>	threaded	Allow threaded access
System.Nullable<System.Boolean>	persistent	Keep cache between evaluations

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Linecache(tileHeight: int, access: string, threaded: bool, persistent: bool);

Log()

Return the natural log of an image.

Declaration

public Image Log()

Returns

Type	Description
Image	A new Image

Log10()

Return the log base 10 of an image.

Declaration

public Image Log10()

Returns

Type	Description
Image	A new Image

Logmat(Double, Double, Nullable<Boolean>, String)

Make a laplacian of gaussian image

Declaration

public static Image Logmat(double sigma, double minAmpl, bool? separable = default(bool? ), string precision = null)

Parameters

Type	Name	Description
System.Double	sigma	Radius of Logmatian
System.Double	minAmpl	Minimum amplitude of Logmatian
System.Nullable<System.Boolean>	separable	Generate separable Logmatian
System.String	precision	Generate with this precision

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Logmat(sigma, minAmpl, separable: bool, precision: string);

Magickload(String, out Int32, String, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, String, Nullable<Boolean>)

Load file with ImageMagick

Declaration

public static Image Magickload(string filename, out int flags, string density = null, int? page = default(int? ), int? n = default(int? ), bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.String	density	Canvas resolution for rendering vector formats like SVG
System.Nullable<System.Int32>	page	Load this page from the file
System.Nullable<System.Int32>	n	Load this many pages
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Magickload(filename, out var flags, density: string, page: int, n: int, memory: bool, access: string, fail: bool);

Magickload(String, String, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, String, Nullable<Boolean>)

Load file with ImageMagick

Declaration

public static Image Magickload(string filename, string density = null, int? page = default(int? ), int? n = default(int? ), bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.String	density	Canvas resolution for rendering vector formats like SVG
System.Nullable<System.Int32>	page	Load this page from the file
System.Nullable<System.Int32>	n	Load this many pages
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Magickload(filename, density: string, page: int, n: int, memory: bool, access: string, fail: bool);

MagickloadBuffer(Byte[], out Int32, String, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, String, Nullable<Boolean>)

Load buffer with ImageMagick

Declaration

public static Image MagickloadBuffer(byte[] buffer, out int flags, string density = null, int? page = default(int? ), int? n = default(int? ), bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.Byte[]	buffer	Buffer to load from
System.Int32	flags	Flags for this file
System.String	density	Canvas resolution for rendering vector formats like SVG
System.Nullable<System.Int32>	page	Load this page from the file
System.Nullable<System.Int32>	n	Load this many pages
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.MagickloadBuffer(buffer, out var flags, density: string, page: int, n: int, memory: bool, access: string, fail: bool);

MagickloadBuffer(Byte[], String, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, String, Nullable<Boolean>)

Load buffer with ImageMagick

Declaration

public static Image MagickloadBuffer(byte[] buffer, string density = null, int? page = default(int? ), int? n = default(int? ), bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.Byte[]	buffer	Buffer to load from
System.String	density	Canvas resolution for rendering vector formats like SVG
System.Nullable<System.Int32>	page	Load this page from the file
System.Nullable<System.Int32>	n	Load this many pages
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.MagickloadBuffer(buffer, density: string, page: int, n: int, memory: bool, access: string, fail: bool);

Magicksave(String, String, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, Double[])

Save file with ImageMagick

Declaration

public void Magicksave(string filename, string format = null, int? quality = default(int? ), int? pageHeight = default(int? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.String	filename	Filename to save to
System.String	format	Format to save in
System.Nullable<System.Int32>	quality	Quality to use
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Examples

in.Magicksave(filename, format: string, quality: int, pageHeight: int, strip: bool, background: double[]);

MagicksaveBuffer(String, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, Double[])

Save image to magick buffer

Declaration

public byte[] MagicksaveBuffer(string format = null, int? quality = default(int? ), int? pageHeight = default(int? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.String	format	Format to save in
System.Nullable<System.Int32>	quality	Quality to use
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Returns

Type	Description
System.Byte[]	An array of bytes

Examples

byte[] buffer = in.MagicksaveBuffer(format: string, quality: int, pageHeight: int, strip: bool, background: double[]);

Mapim(Image, GObject)

Resample with an mapim image

Declaration

public Image Mapim(Image index, GObject interpolate = null)

Parameters

Type	Name	Description
Image	index	Index pixels with this
GObject	interpolate	Interpolate pixels with this

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Mapim(index, interpolate: GObject);

Maplut(Image, Nullable<Int32>)

Map an image though a lut

Declaration

public Image Maplut(Image lut, int? band = default(int? ))

Parameters

Type	Name	Description
Image	lut	Look-up table image
System.Nullable<System.Int32>	band	apply one-band lut to this band of in

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Maplut(lut, band: int);

MaskButterworth(Int32, Int32, Double, Double, Double, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>)

Make a butterworth filter

Declaration

public static Image MaskButterworth(int width, int height, double order, double frequencyCutoff, double amplitudeCutoff, bool? uchar = default(bool? ), bool? nodc = default(bool? ), bool? reject = default(bool? ), bool? optical = default(bool? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Double	order	Filter order
System.Double	frequencyCutoff	Frequency cutoff
System.Double	amplitudeCutoff	Amplitude cutoff
System.Nullable<System.Boolean>	uchar	Output an unsigned char image
System.Nullable<System.Boolean>	nodc	Remove DC component
System.Nullable<System.Boolean>	reject	Invert the sense of the filter
System.Nullable<System.Boolean>	optical	Rotate quadrants to optical space

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.MaskButterworth(width, height, order, frequencyCutoff, amplitudeCutoff, uchar: bool, nodc: bool, reject: bool, optical: bool);

MaskButterworthBand(Int32, Int32, Double, Double, Double, Double, Double, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>)

Make a butterworth_band filter

Declaration

public static Image MaskButterworthBand(int width, int height, double order, double frequencyCutoffX, double frequencyCutoffY, double radius, double amplitudeCutoff, bool? uchar = default(bool? ), bool? nodc = default(bool? ), bool? reject = default(bool? ), bool? optical = default(bool? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Double	order	Filter order
System.Double	frequencyCutoffX	Frequency cutoff x
System.Double	frequencyCutoffY	Frequency cutoff y
System.Double	radius	radius of circle
System.Double	amplitudeCutoff	Amplitude cutoff
System.Nullable<System.Boolean>	uchar	Output an unsigned char image
System.Nullable<System.Boolean>	nodc	Remove DC component
System.Nullable<System.Boolean>	reject	Invert the sense of the filter
System.Nullable<System.Boolean>	optical	Rotate quadrants to optical space

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.MaskButterworthBand(width, height, order, frequencyCutoffX, frequencyCutoffY, radius, amplitudeCutoff, uchar: bool, nodc: bool, reject: bool, optical: bool);

MaskButterworthRing(Int32, Int32, Double, Double, Double, Double, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>)

Make a butterworth ring filter

Declaration

public static Image MaskButterworthRing(int width, int height, double order, double frequencyCutoff, double amplitudeCutoff, double ringwidth, bool? uchar = default(bool? ), bool? nodc = default(bool? ), bool? reject = default(bool? ), bool? optical = default(bool? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Double	order	Filter order
System.Double	frequencyCutoff	Frequency cutoff
System.Double	amplitudeCutoff	Amplitude cutoff
System.Double	ringwidth	Ringwidth
System.Nullable<System.Boolean>	uchar	Output an unsigned char image
System.Nullable<System.Boolean>	nodc	Remove DC component
System.Nullable<System.Boolean>	reject	Invert the sense of the filter
System.Nullable<System.Boolean>	optical	Rotate quadrants to optical space

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.MaskButterworthRing(width, height, order, frequencyCutoff, amplitudeCutoff, ringwidth, uchar: bool, nodc: bool, reject: bool, optical: bool);

MaskFractal(Int32, Int32, Double, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>)

Make fractal filter

Declaration

public static Image MaskFractal(int width, int height, double fractalDimension, bool? uchar = default(bool? ), bool? nodc = default(bool? ), bool? reject = default(bool? ), bool? optical = default(bool? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Double	fractalDimension	Fractal dimension
System.Nullable<System.Boolean>	uchar	Output an unsigned char image
System.Nullable<System.Boolean>	nodc	Remove DC component
System.Nullable<System.Boolean>	reject	Invert the sense of the filter
System.Nullable<System.Boolean>	optical	Rotate quadrants to optical space

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.MaskFractal(width, height, fractalDimension, uchar: bool, nodc: bool, reject: bool, optical: bool);

MaskGaussian(Int32, Int32, Double, Double, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>)

Make a gaussian filter

Declaration

public static Image MaskGaussian(int width, int height, double frequencyCutoff, double amplitudeCutoff, bool? uchar = default(bool? ), bool? nodc = default(bool? ), bool? reject = default(bool? ), bool? optical = default(bool? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Double	frequencyCutoff	Frequency cutoff
System.Double	amplitudeCutoff	Amplitude cutoff
System.Nullable<System.Boolean>	uchar	Output an unsigned char image
System.Nullable<System.Boolean>	nodc	Remove DC component
System.Nullable<System.Boolean>	reject	Invert the sense of the filter
System.Nullable<System.Boolean>	optical	Rotate quadrants to optical space

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.MaskGaussian(width, height, frequencyCutoff, amplitudeCutoff, uchar: bool, nodc: bool, reject: bool, optical: bool);

MaskGaussianBand(Int32, Int32, Double, Double, Double, Double, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>)

Make a gaussian filter

Declaration

public static Image MaskGaussianBand(int width, int height, double frequencyCutoffX, double frequencyCutoffY, double radius, double amplitudeCutoff, bool? uchar = default(bool? ), bool? nodc = default(bool? ), bool? reject = default(bool? ), bool? optical = default(bool? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Double	frequencyCutoffX	Frequency cutoff x
System.Double	frequencyCutoffY	Frequency cutoff y
System.Double	radius	radius of circle
System.Double	amplitudeCutoff	Amplitude cutoff
System.Nullable<System.Boolean>	uchar	Output an unsigned char image
System.Nullable<System.Boolean>	nodc	Remove DC component
System.Nullable<System.Boolean>	reject	Invert the sense of the filter
System.Nullable<System.Boolean>	optical	Rotate quadrants to optical space

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.MaskGaussianBand(width, height, frequencyCutoffX, frequencyCutoffY, radius, amplitudeCutoff, uchar: bool, nodc: bool, reject: bool, optical: bool);

MaskGaussianRing(Int32, Int32, Double, Double, Double, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>)

Make a gaussian ring filter

Declaration

public static Image MaskGaussianRing(int width, int height, double frequencyCutoff, double amplitudeCutoff, double ringwidth, bool? uchar = default(bool? ), bool? nodc = default(bool? ), bool? reject = default(bool? ), bool? optical = default(bool? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Double	frequencyCutoff	Frequency cutoff
System.Double	amplitudeCutoff	Amplitude cutoff
System.Double	ringwidth	Ringwidth
System.Nullable<System.Boolean>	uchar	Output an unsigned char image
System.Nullable<System.Boolean>	nodc	Remove DC component
System.Nullable<System.Boolean>	reject	Invert the sense of the filter
System.Nullable<System.Boolean>	optical	Rotate quadrants to optical space

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.MaskGaussianRing(width, height, frequencyCutoff, amplitudeCutoff, ringwidth, uchar: bool, nodc: bool, reject: bool, optical: bool);

MaskIdeal(Int32, Int32, Double, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>)

Make an ideal filter

Declaration

public static Image MaskIdeal(int width, int height, double frequencyCutoff, bool? uchar = default(bool? ), bool? nodc = default(bool? ), bool? reject = default(bool? ), bool? optical = default(bool? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Double	frequencyCutoff	Frequency cutoff
System.Nullable<System.Boolean>	uchar	Output an unsigned char image
System.Nullable<System.Boolean>	nodc	Remove DC component
System.Nullable<System.Boolean>	reject	Invert the sense of the filter
System.Nullable<System.Boolean>	optical	Rotate quadrants to optical space

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.MaskIdeal(width, height, frequencyCutoff, uchar: bool, nodc: bool, reject: bool, optical: bool);

MaskIdealBand(Int32, Int32, Double, Double, Double, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>)

Make an ideal band filter

Declaration

public static Image MaskIdealBand(int width, int height, double frequencyCutoffX, double frequencyCutoffY, double radius, bool? uchar = default(bool? ), bool? nodc = default(bool? ), bool? reject = default(bool? ), bool? optical = default(bool? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Double	frequencyCutoffX	Frequency cutoff x
System.Double	frequencyCutoffY	Frequency cutoff y
System.Double	radius	radius of circle
System.Nullable<System.Boolean>	uchar	Output an unsigned char image
System.Nullable<System.Boolean>	nodc	Remove DC component
System.Nullable<System.Boolean>	reject	Invert the sense of the filter
System.Nullable<System.Boolean>	optical	Rotate quadrants to optical space

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.MaskIdealBand(width, height, frequencyCutoffX, frequencyCutoffY, radius, uchar: bool, nodc: bool, reject: bool, optical: bool);

MaskIdealRing(Int32, Int32, Double, Double, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>)

Make an ideal ring filter

Declaration

public static Image MaskIdealRing(int width, int height, double frequencyCutoff, double ringwidth, bool? uchar = default(bool? ), bool? nodc = default(bool? ), bool? reject = default(bool? ), bool? optical = default(bool? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Double	frequencyCutoff	Frequency cutoff
System.Double	ringwidth	Ringwidth
System.Nullable<System.Boolean>	uchar	Output an unsigned char image
System.Nullable<System.Boolean>	nodc	Remove DC component
System.Nullable<System.Boolean>	reject	Invert the sense of the filter
System.Nullable<System.Boolean>	optical	Rotate quadrants to optical space

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.MaskIdealRing(width, height, frequencyCutoff, ringwidth, uchar: bool, nodc: bool, reject: bool, optical: bool);

Match(Image, Int32, Int32, Int32, Int32, Int32, Int32, Int32, Int32, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, GObject)

First-order match of two images

Declaration

public Image Match(Image sec, int xr1, int yr1, int xs1, int ys1, int xr2, int yr2, int xs2, int ys2, int? hwindow = default(int? ), int? harea = default(int? ), bool? search = default(bool? ), GObject interpolate = null)

Parameters

Type	Name	Description
Image	sec	Secondary image
System.Int32	xr1	Position of first reference tie-point
System.Int32	yr1	Position of first reference tie-point
System.Int32	xs1	Position of first secondary tie-point
System.Int32	ys1	Position of first secondary tie-point
System.Int32	xr2	Position of second reference tie-point
System.Int32	yr2	Position of second reference tie-point
System.Int32	xs2	Position of second secondary tie-point
System.Int32	ys2	Position of second secondary tie-point
System.Nullable<System.Int32>	hwindow	Half window size
System.Nullable<System.Int32>	harea	Half area size
System.Nullable<System.Boolean>	search	Search to improve tie-points
GObject	interpolate	Interpolate pixels with this

Returns

Type	Description
Image	A new Image

Examples

Image @out = ref.Match(sec, xr1, yr1, xs1, ys1, xr2, yr2, xs2, ys2, hwindow: int, harea: int, search: bool, interpolate: GObject);

Math(String)

Apply a math operation to an image

Declaration

public Image Math(string math)

Parameters

Type	Name	Description
System.String	math	math to perform

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Math(math);

Math2(Image, String)

Binary math operations

Declaration

public Image Math2(Image right, string math2)

Parameters

Type	Name	Description
Image	right	Right-hand image argument
System.String	math2	math to perform

Returns

Type	Description
Image	A new Image

Examples

Image @out = left.Math2(right, math2);

Math2Const(String, Double[])

Binary math operations with a constant

Declaration

public Image Math2Const(string math2, double[] c)

Parameters

Type	Name	Description
System.String	math2	math to perform
System.Double[]	c	Array of constants

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Math2Const(math2, c);

Matload(String, out Int32, Nullable<Boolean>, String, Nullable<Boolean>)

Load mat from file

Declaration

public static Image Matload(string filename, out int flags, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Matload(filename, out var flags, memory: bool, access: string, fail: bool);

Matload(String, Nullable<Boolean>, String, Nullable<Boolean>)

Load mat from file

Declaration

public static Image Matload(string filename, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Matload(filename, memory: bool, access: string, fail: bool);

Matrixload(String, out Int32, Nullable<Boolean>, String, Nullable<Boolean>)

Load matrix from file

Declaration

public static Image Matrixload(string filename, out int flags, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Matrixload(filename, out var flags, memory: bool, access: string, fail: bool);

Matrixload(String, Nullable<Boolean>, String, Nullable<Boolean>)

Load matrix from file

Declaration

public static Image Matrixload(string filename, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Matrixload(filename, memory: bool, access: string, fail: bool);

Matrixprint(Nullable<Int32>, Nullable<Boolean>, Double[])

Print matrix

Declaration

public void Matrixprint(int? pageHeight = default(int? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Examples

in.Matrixprint(pageHeight: int, strip: bool, background: double[]);

Matrixsave(String, Nullable<Int32>, Nullable<Boolean>, Double[])

Save image to matrix file

Declaration

public void Matrixsave(string filename, int? pageHeight = default(int? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.String	filename	Filename to save to
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Examples

in.Matrixsave(filename, pageHeight: int, strip: bool, background: double[]);

Max(out Int32, out Int32, out Double[], out Int32[], out Int32[], Nullable<Int32>)

Find image maximum

Declaration

public double Max(out int x, out int y, out double[] outArray, out int[] xArray, out int[] yArray, int? size = default(int? ))

Parameters

Type	Name	Description
System.Int32	x	Horizontal position of maximum
System.Int32	y	Vertical position of maximum
System.Double[]	outArray	Array of output values
System.Int32[]	xArray	Array of horizontal positions
System.Int32[]	yArray	Array of vertical positions
System.Nullable<System.Int32>	size	Number of maximum values to find

Returns

Type	Description
System.Double	A double

Examples

double @out = in.Max(out var x, out var y, out var outArray, out var xArray, out var yArray, size: int);

Max(out Int32, out Int32, out Double[], out Int32[], Nullable<Int32>)

Find image maximum

Declaration

public double Max(out int x, out int y, out double[] outArray, out int[] xArray, int? size = default(int? ))

Parameters

Type	Name	Description
System.Int32	x	Horizontal position of maximum
System.Int32	y	Vertical position of maximum
System.Double[]	outArray	Array of output values
System.Int32[]	xArray	Array of horizontal positions
System.Nullable<System.Int32>	size	Number of maximum values to find

Returns

Type	Description
System.Double	A double

Examples

double @out = in.Max(out var x, out var y, out var outArray, out var xArray, size: int);

Max(out Int32, out Int32, out Double[], Nullable<Int32>)

Find image maximum

Declaration

public double Max(out int x, out int y, out double[] outArray, int? size = default(int? ))

Parameters

Type	Name	Description
System.Int32	x	Horizontal position of maximum
System.Int32	y	Vertical position of maximum
System.Double[]	outArray	Array of output values
System.Nullable<System.Int32>	size	Number of maximum values to find

Returns

Type	Description
System.Double	A double

Examples

double @out = in.Max(out var x, out var y, out var outArray, size: int);

Max(out Int32, out Int32, Nullable<Int32>)

Find image maximum

Declaration

public double Max(out int x, out int y, int? size = default(int? ))

Parameters

Type	Name	Description
System.Int32	x	Horizontal position of maximum
System.Int32	y	Vertical position of maximum
System.Nullable<System.Int32>	size	Number of maximum values to find

Returns

Type	Description
System.Double	A double

Examples

double @out = in.Max(out var x, out var y, size: int);

Max(out Int32, Nullable<Int32>)

Find image maximum

Declaration

public double Max(out int x, int? size = default(int? ))

Parameters

Type	Name	Description
System.Int32	x	Horizontal position of maximum
System.Nullable<System.Int32>	size	Number of maximum values to find

Returns

Type	Description
System.Double	A double

Examples

double @out = in.Max(out var x, size: int);

Max(Nullable<Int32>)

Find image maximum

Declaration

public double Max(int? size = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	size	Number of maximum values to find

Returns

Type	Description
System.Double	A double

Examples

double @out = in.Max(size: int);

MaxPos()

Return the coordinates of the image maximum.

Declaration

public double[] MaxPos()

Returns

Type	Description
System.Double[]	An array of doubles

Measure(Int32, Int32, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>)

Measure a set of patches on a color chart

Declaration

public Image Measure(int h, int v, int? left = default(int? ), int? top = default(int? ), int? width = default(int? ), int? height = default(int? ))

Parameters

Type	Name	Description
System.Int32	h	Number of patches across chart
System.Int32	v	Number of patches down chart
System.Nullable<System.Int32>	left	Left edge of extract area
System.Nullable<System.Int32>	top	Top edge of extract area
System.Nullable<System.Int32>	width	Width of extract area
System.Nullable<System.Int32>	height	Height of extract area

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Measure(h, v, left: int, top: int, width: int, height: int);

Median(Int32)

size x size median filter.

Declaration

public Image Median(int size)

Parameters

Type	Name	Description
System.Int32	size

Returns

Type	Description
Image	A new Image

Merge(Image, String, Int32, Int32, Nullable<Int32>)

Merge two images

Declaration

public Image Merge(Image sec, string direction, int dx, int dy, int? mblend = default(int? ))

Parameters

Type	Name	Description
Image	sec	Secondary image
System.String	direction	Horizontal or vertcial merge
System.Int32	dx	Horizontal displacement from sec to ref
System.Int32	dy	Vertical displacement from sec to ref
System.Nullable<System.Int32>	mblend	Maximum blend size

Returns

Type	Description
Image	A new Image

Examples

Image @out = ref.Merge(sec, direction, dx, dy, mblend: int);

Min(out Int32, out Int32, out Double[], out Int32[], out Int32[], Nullable<Int32>)

Find image minimum

Declaration

public double Min(out int x, out int y, out double[] outArray, out int[] xArray, out int[] yArray, int? size = default(int? ))

Parameters

Type	Name	Description
System.Int32	x	Horizontal position of minimum
System.Int32	y	Vertical position of minimum
System.Double[]	outArray	Array of output values
System.Int32[]	xArray	Array of horizontal positions
System.Int32[]	yArray	Array of vertical positions
System.Nullable<System.Int32>	size	Number of minimum values to find

Returns

Type	Description
System.Double	A double

Examples

double @out = in.Min(out var x, out var y, out var outArray, out var xArray, out var yArray, size: int);

Min(out Int32, out Int32, out Double[], out Int32[], Nullable<Int32>)

Find image minimum

Declaration

public double Min(out int x, out int y, out double[] outArray, out int[] xArray, int? size = default(int? ))

Parameters

Type	Name	Description
System.Int32	x	Horizontal position of minimum
System.Int32	y	Vertical position of minimum
System.Double[]	outArray	Array of output values
System.Int32[]	xArray	Array of horizontal positions
System.Nullable<System.Int32>	size	Number of minimum values to find

Returns

Type	Description
System.Double	A double

Examples

double @out = in.Min(out var x, out var y, out var outArray, out var xArray, size: int);

Min(out Int32, out Int32, out Double[], Nullable<Int32>)

Find image minimum

Declaration

public double Min(out int x, out int y, out double[] outArray, int? size = default(int? ))

Parameters

Type	Name	Description
System.Int32	x	Horizontal position of minimum
System.Int32	y	Vertical position of minimum
System.Double[]	outArray	Array of output values
System.Nullable<System.Int32>	size	Number of minimum values to find

Returns

Type	Description
System.Double	A double

Examples

double @out = in.Min(out var x, out var y, out var outArray, size: int);

Min(out Int32, out Int32, Nullable<Int32>)

Find image minimum

Declaration

public double Min(out int x, out int y, int? size = default(int? ))

Parameters

Type	Name	Description
System.Int32	x	Horizontal position of minimum
System.Int32	y	Vertical position of minimum
System.Nullable<System.Int32>	size	Number of minimum values to find

Returns

Type	Description
System.Double	A double

Examples

double @out = in.Min(out var x, out var y, size: int);

Min(out Int32, Nullable<Int32>)

Find image minimum

Declaration

public double Min(out int x, int? size = default(int? ))

Parameters

Type	Name	Description
System.Int32	x	Horizontal position of minimum
System.Nullable<System.Int32>	size	Number of minimum values to find

Returns

Type	Description
System.Double	A double

Examples

double @out = in.Min(out var x, size: int);

Min(Nullable<Int32>)

Find image minimum

Declaration

public double Min(int? size = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	size	Number of minimum values to find

Returns

Type	Description
System.Double	A double

Examples

double @out = in.Min(size: int);

MinPos()

Return the coordinates of the image minimum.

Declaration

public double[] MinPos()

Returns

Type	Description
System.Double[]	An array of doubles

Morph(Image, String)

Morphology operation

Declaration

public Image Morph(Image mask, string morph)

Parameters

Type	Name	Description
Image	mask	Input matrix image
System.String	morph	Morphological operation to perform

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Morph(mask, morph);

Mosaic(Image, String, Int32, Int32, Int32, Int32, out Int32, out Int32, out Double, out Double, out Double, out Double, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>)

Mosaic two images

Declaration

public Image Mosaic(Image sec, string direction, int xref, int yref, int xsec, int ysec, out int dx0, out int dy0, out double scale1, out double angle1, out double dy1, out double dx1, int? hwindow = default(int? ), int? harea = default(int? ), int? mblend = default(int? ), int? bandno = default(int? ))

Parameters

Type	Name	Description
Image	sec	Secondary image
System.String	direction	Horizontal or vertcial mosaic
System.Int32	xref	Position of reference tie-point
System.Int32	yref	Position of reference tie-point
System.Int32	xsec	Position of secondary tie-point
System.Int32	ysec	Position of secondary tie-point
System.Int32	dx0	Detected integer offset
System.Int32	dy0	Detected integer offset
System.Double	scale1	Detected scale
System.Double	angle1	Detected rotation
System.Double	dy1	Detected first-order displacement
System.Double	dx1	Detected first-order displacement
System.Nullable<System.Int32>	hwindow	Half window size
System.Nullable<System.Int32>	harea	Half area size
System.Nullable<System.Int32>	mblend	Maximum blend size
System.Nullable<System.Int32>	bandno	Band to search for features on

Returns

Type	Description
Image	A new Image

Examples

Image @out = ref.Mosaic(sec, direction, xref, yref, xsec, ysec, out var dx0, out var dy0, out var scale1, out var angle1, out var dy1, out var dx1, hwindow: int, harea: int, mblend: int, bandno: int);

Mosaic(Image, String, Int32, Int32, Int32, Int32, out Int32, out Int32, out Double, out Double, out Double, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>)

Mosaic two images

Declaration

public Image Mosaic(Image sec, string direction, int xref, int yref, int xsec, int ysec, out int dx0, out int dy0, out double scale1, out double angle1, out double dy1, int? hwindow = default(int? ), int? harea = default(int? ), int? mblend = default(int? ), int? bandno = default(int? ))

Parameters

Type	Name	Description
Image	sec	Secondary image
System.String	direction	Horizontal or vertcial mosaic
System.Int32	xref	Position of reference tie-point
System.Int32	yref	Position of reference tie-point
System.Int32	xsec	Position of secondary tie-point
System.Int32	ysec	Position of secondary tie-point
System.Int32	dx0	Detected integer offset
System.Int32	dy0	Detected integer offset
System.Double	scale1	Detected scale
System.Double	angle1	Detected rotation
System.Double	dy1	Detected first-order displacement
System.Nullable<System.Int32>	hwindow	Half window size
System.Nullable<System.Int32>	harea	Half area size
System.Nullable<System.Int32>	mblend	Maximum blend size
System.Nullable<System.Int32>	bandno	Band to search for features on

Returns

Type	Description
Image	A new Image

Examples

Image @out = ref.Mosaic(sec, direction, xref, yref, xsec, ysec, out var dx0, out var dy0, out var scale1, out var angle1, out var dy1, hwindow: int, harea: int, mblend: int, bandno: int);

Mosaic(Image, String, Int32, Int32, Int32, Int32, out Int32, out Int32, out Double, out Double, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>)

Mosaic two images

Declaration

public Image Mosaic(Image sec, string direction, int xref, int yref, int xsec, int ysec, out int dx0, out int dy0, out double scale1, out double angle1, int? hwindow = default(int? ), int? harea = default(int? ), int? mblend = default(int? ), int? bandno = default(int? ))

Parameters

Type	Name	Description
Image	sec	Secondary image
System.String	direction	Horizontal or vertcial mosaic
System.Int32	xref	Position of reference tie-point
System.Int32	yref	Position of reference tie-point
System.Int32	xsec	Position of secondary tie-point
System.Int32	ysec	Position of secondary tie-point
System.Int32	dx0	Detected integer offset
System.Int32	dy0	Detected integer offset
System.Double	scale1	Detected scale
System.Double	angle1	Detected rotation
System.Nullable<System.Int32>	hwindow	Half window size
System.Nullable<System.Int32>	harea	Half area size
System.Nullable<System.Int32>	mblend	Maximum blend size
System.Nullable<System.Int32>	bandno	Band to search for features on

Returns

Type	Description
Image	A new Image

Examples

Image @out = ref.Mosaic(sec, direction, xref, yref, xsec, ysec, out var dx0, out var dy0, out var scale1, out var angle1, hwindow: int, harea: int, mblend: int, bandno: int);

Mosaic(Image, String, Int32, Int32, Int32, Int32, out Int32, out Int32, out Double, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>)

Mosaic two images

Declaration

public Image Mosaic(Image sec, string direction, int xref, int yref, int xsec, int ysec, out int dx0, out int dy0, out double scale1, int? hwindow = default(int? ), int? harea = default(int? ), int? mblend = default(int? ), int? bandno = default(int? ))

Parameters

Type	Name	Description
Image	sec	Secondary image
System.String	direction	Horizontal or vertcial mosaic
System.Int32	xref	Position of reference tie-point
System.Int32	yref	Position of reference tie-point
System.Int32	xsec	Position of secondary tie-point
System.Int32	ysec	Position of secondary tie-point
System.Int32	dx0	Detected integer offset
System.Int32	dy0	Detected integer offset
System.Double	scale1	Detected scale
System.Nullable<System.Int32>	hwindow	Half window size
System.Nullable<System.Int32>	harea	Half area size
System.Nullable<System.Int32>	mblend	Maximum blend size
System.Nullable<System.Int32>	bandno	Band to search for features on

Returns

Type	Description
Image	A new Image

Examples

Image @out = ref.Mosaic(sec, direction, xref, yref, xsec, ysec, out var dx0, out var dy0, out var scale1, hwindow: int, harea: int, mblend: int, bandno: int);

Mosaic(Image, String, Int32, Int32, Int32, Int32, out Int32, out Int32, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>)

Mosaic two images

Declaration

public Image Mosaic(Image sec, string direction, int xref, int yref, int xsec, int ysec, out int dx0, out int dy0, int? hwindow = default(int? ), int? harea = default(int? ), int? mblend = default(int? ), int? bandno = default(int? ))

Parameters

Type	Name	Description
Image	sec	Secondary image
System.String	direction	Horizontal or vertcial mosaic
System.Int32	xref	Position of reference tie-point
System.Int32	yref	Position of reference tie-point
System.Int32	xsec	Position of secondary tie-point
System.Int32	ysec	Position of secondary tie-point
System.Int32	dx0	Detected integer offset
System.Int32	dy0	Detected integer offset
System.Nullable<System.Int32>	hwindow	Half window size
System.Nullable<System.Int32>	harea	Half area size
System.Nullable<System.Int32>	mblend	Maximum blend size
System.Nullable<System.Int32>	bandno	Band to search for features on

Returns

Type	Description
Image	A new Image

Examples

Image @out = ref.Mosaic(sec, direction, xref, yref, xsec, ysec, out var dx0, out var dy0, hwindow: int, harea: int, mblend: int, bandno: int);

Mosaic(Image, String, Int32, Int32, Int32, Int32, out Int32, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>)

Mosaic two images

Declaration

public Image Mosaic(Image sec, string direction, int xref, int yref, int xsec, int ysec, out int dx0, int? hwindow = default(int? ), int? harea = default(int? ), int? mblend = default(int? ), int? bandno = default(int? ))

Parameters

Type	Name	Description
Image	sec	Secondary image
System.String	direction	Horizontal or vertcial mosaic
System.Int32	xref	Position of reference tie-point
System.Int32	yref	Position of reference tie-point
System.Int32	xsec	Position of secondary tie-point
System.Int32	ysec	Position of secondary tie-point
System.Int32	dx0	Detected integer offset
System.Nullable<System.Int32>	hwindow	Half window size
System.Nullable<System.Int32>	harea	Half area size
System.Nullable<System.Int32>	mblend	Maximum blend size
System.Nullable<System.Int32>	bandno	Band to search for features on

Returns

Type	Description
Image	A new Image

Examples

Image @out = ref.Mosaic(sec, direction, xref, yref, xsec, ysec, out var dx0, hwindow: int, harea: int, mblend: int, bandno: int);

Mosaic(Image, String, Int32, Int32, Int32, Int32, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>, Nullable<Int32>)

Mosaic two images

Declaration

public Image Mosaic(Image sec, string direction, int xref, int yref, int xsec, int ysec, int? hwindow = default(int? ), int? harea = default(int? ), int? mblend = default(int? ), int? bandno = default(int? ))

Parameters

Type	Name	Description
Image	sec	Secondary image
System.String	direction	Horizontal or vertcial mosaic
System.Int32	xref	Position of reference tie-point
System.Int32	yref	Position of reference tie-point
System.Int32	xsec	Position of secondary tie-point
System.Int32	ysec	Position of secondary tie-point
System.Nullable<System.Int32>	hwindow	Half window size
System.Nullable<System.Int32>	harea	Half area size
System.Nullable<System.Int32>	mblend	Maximum blend size
System.Nullable<System.Int32>	bandno	Band to search for features on

Returns

Type	Description
Image	A new Image

Examples

Image @out = ref.Mosaic(sec, direction, xref, yref, xsec, ysec, hwindow: int, harea: int, mblend: int, bandno: int);

Mosaic1(Image, String, Int32, Int32, Int32, Int32, Int32, Int32, Int32, Int32, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, GObject, Nullable<Int32>, Nullable<Int32>)

First-order mosaic of two images

Declaration

public Image Mosaic1(Image sec, string direction, int xr1, int yr1, int xs1, int ys1, int xr2, int yr2, int xs2, int ys2, int? hwindow = default(int? ), int? harea = default(int? ), bool? search = default(bool? ), GObject interpolate = null, int? mblend = default(int? ), int? bandno = default(int? ))

Parameters

Type	Name	Description
Image	sec	Secondary image
System.String	direction	Horizontal or vertcial mosaic
System.Int32	xr1	Position of first reference tie-point
System.Int32	yr1	Position of first reference tie-point
System.Int32	xs1	Position of first secondary tie-point
System.Int32	ys1	Position of first secondary tie-point
System.Int32	xr2	Position of second reference tie-point
System.Int32	yr2	Position of second reference tie-point
System.Int32	xs2	Position of second secondary tie-point
System.Int32	ys2	Position of second secondary tie-point
System.Nullable<System.Int32>	hwindow	Half window size
System.Nullable<System.Int32>	harea	Half area size
System.Nullable<System.Boolean>	search	Search to improve tie-points
GObject	interpolate	Interpolate pixels with this
System.Nullable<System.Int32>	mblend	Maximum blend size
System.Nullable<System.Int32>	bandno	Band to search for features on

Returns

Type	Description
Image	A new Image

Examples

Image @out = ref.Mosaic1(sec, direction, xr1, yr1, xs1, ys1, xr2, yr2, xs2, ys2, hwindow: int, harea: int, search: bool, interpolate: GObject, mblend: int, bandno: int);

Msb(Nullable<Int32>)

Pick most-significant byte from an image

Declaration

public Image Msb(int? band = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	band	Band to msb

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Msb(band: int);

Multiply(Image)

Multiply two images

Declaration

public Image Multiply(Image right)

Parameters

Type	Name	Description
Image	right	Right-hand image argument

Returns

Type	Description
Image	A new Image

Examples

Image @out = left.Multiply(right);

NewFromArray(Object, Double, Double)

Create an image from a 1D or 2D array.

Declaration

public static Image NewFromArray(object array, double scale = 1, double offset = 0)

Parameters

Type	Name	Description
System.Object	array	Create the image from these values. 1D arrays become a single row of pixels.
System.Double	scale	Default to 1.0. What to divide each pixel by after convolution. Useful for integer convolution masks.
System.Double	offset	Default to 0.0. What to subtract from each pixel after convolution. Useful for integer convolution masks.

Returns

Type	Description
Image	A new Image

Remarks

A new one-band image with Double pixels is created from the array. These image are useful with the libvips convolution operator Conv(Image, String, Nullable<Int32>, Nullable<Int32>)

Exceptions

Type	Condition
VipsException	If unable to make image from array.

NewFromBuffer(Object, String, String, Nullable<Boolean>, VOption)

Load a formatted image from memory.

Declaration

public static Image NewFromBuffer(object data, string strOptions = "", string access = null, bool? fail = default(bool? ), VOption kwargs = null)

Parameters

Type	Name	Description
System.Object	data	The memory object to load the image from.
System.String	strOptions	Load options as a string. Use System.String.Empty for no options.
System.String	access	Hint the expected access pattern for the image.
System.Nullable<System.Boolean>	fail	If set True, the loader will fail with an error on the first serious error in the file. By default, libvips will attempt to read everything it can from a damanged image.
VOption	kwargs	Optional options that depend on the load operation.

Returns

Type	Description
Image	A new Image

Remarks

This behaves exactly as NewFromFile(String, Nullable<Boolean>, String, Nullable<Boolean>, VOption), but the image is loaded from the memory object rather than from a file. The memory object can be a string or buffer.

Exceptions

Type	Condition
VipsException	If unable to load from data.

NewFromFile(String, Nullable<Boolean>, String, Nullable<Boolean>, VOption)

Load an image from a file.

Declaration

public static Image NewFromFile(string vipsFilename, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ), VOption kwargs = null)

Parameters

Type	Name	Description
System.String	vipsFilename	The disc file to load the image from, with optional appended arguments.
System.Nullable<System.Boolean>	memory	If set True, load the image via memory rather than via a temporary disc file. See NewTempFile(String) for notes on where temporary files are created. Small images are loaded via memory by default, use VIPS_DISC_THRESHOLD to set the definition of small.
System.String	access	Hint the expected access pattern for the image.
System.Nullable<System.Boolean>	fail	If set True, the loader will fail with an error on the first serious error in the file. By default, libvips will attempt to read everything it can from a damanged image.
VOption	kwargs	Optional options that depend on the load operation.

Returns

Type	Description
Image	A new Image

Remarks

This method can load images in any format supported by vips. The filename can include load options, for example:

var image = Image.NewFromFile("fred.jpg[shrink=2]");

You can also supply options as keyword arguments, for example:

var image = Image.NewFromFile("fred.jpg", new VOption
{
    {"shrink", 2}
});

The full set of options available depend upon the load operation that will be executed. Try something like:

$ vips jpegload

at the command-line to see a summary of the available options for the JPEG loader.

Loading is fast: only enough of the image is loaded to be able to fill out the header. Pixels will only be decompressed when they are needed.

Exceptions

Type	Condition
VipsException	If unable to load from vipsFilename.

NewFromImage(Object)

Make a new image from an existing one.

Declaration

public Image NewFromImage(object value)

Parameters

Type	Name	Description
System.Object	value	The value for the pixels. Use a single number to make a one-band image; use an array constant to make a many-band image.

Returns

Type	Description
Image	A new Image

Remarks

A new image is created which has the same size, format, interpretation and resolution as this, but with every pixel set to value.

NewFromMemory(Array, Int32, Int32, Int32, String)

Wrap an image around a memory array.

Declaration

public static Image NewFromMemory(Array data, int width, int height, int bands, string format)

Parameters

Type	Name	Description
System.Array	data	A memoryview or buffer object.
System.Int32	width	Image width in pixels.
System.Int32	height	Image height in pixels.
System.Int32	bands	Number of bands
System.String	format	Band format.

Returns

Type	Description
Image	A new Image

Remarks

Wraps an Image around an area of memory containing a C-style array. For example, if the data memory array contains four bytes with the values 1, 2, 3, 4, you can make a one-band, 2x2 uchar image from it like this:

var image = Image.NewFromMemory(data, 2, 2, 1, "uchar");

A reference is kept to the data object, so it will not be garbage-collected until the returned image is garbage-collected.

This method is useful for efficiently transferring images from GDI+ into libvips.

See WriteToMemory() for the opposite operation.

Use Copy(Nullable<Int32>, Nullable<Int32>, Nullable<Int32>, String, String, String, Nullable<Double>, Nullable<Double>, Nullable<Int32>, Nullable<Int32>) to set other image attributes.

Exceptions

Type	Condition
VipsException	If unable to make image from data.

NewTempFile(String)

Make a new temporary image.

Declaration

public static Image NewTempFile(string format)

Parameters

Type	Name	Description
System.String	format	The format for the temp file, for example %s.v for a vips format file. The %s is substituted by the file path.

Returns

Type	Description
Image	A new Image

Remarks

Returns an image backed by a temporary file. When written to with Write(Image), a temporary file will be created on disc in the specified format. When the image is closed, the file will be deleted automatically.

The file is created in the temporary directory. This is set with the environment variable TMPDIR. If this is not set, then on Unix systems, vips will default to /tmp. On Windows, vips uses GetTempPath() to find the temporary directory.

vips uses g_mkstemp() to make the temporary filename. They generally look something like vips-12-EJKJFGH.v.

Exceptions

Type	Condition
VipsException	If unable to make temp file from format.

Niftiload(String, out Int32, Nullable<Boolean>, String, Nullable<Boolean>)

Load a NIFTI image

Declaration

public static Image Niftiload(string filename, out int flags, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Niftiload(filename, out var flags, memory: bool, access: string, fail: bool);

Niftiload(String, Nullable<Boolean>, String, Nullable<Boolean>)

Load a NIFTI image

Declaration

public static Image Niftiload(string filename, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Niftiload(filename, memory: bool, access: string, fail: bool);

Niftisave(String, Nullable<Int32>, Nullable<Boolean>, Double[])

Save image to nifti file

Declaration

public void Niftisave(string filename, int? pageHeight = default(int? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.String	filename	Filename to save to
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Examples

in.Niftisave(filename, pageHeight: int, strip: bool, background: double[]);

Openexrload(String, out Int32, Nullable<Boolean>, String, Nullable<Boolean>)

Load an OpenEXR image

Declaration

public static Image Openexrload(string filename, out int flags, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Openexrload(filename, out var flags, memory: bool, access: string, fail: bool);

Openexrload(String, Nullable<Boolean>, String, Nullable<Boolean>)

Load an OpenEXR image

Declaration

public static Image Openexrload(string filename, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Openexrload(filename, memory: bool, access: string, fail: bool);

Openslideload(String, out Int32, Nullable<Boolean>, String, Nullable<Int32>, Nullable<Boolean>, Nullable<Boolean>, String)

Load file with OpenSlide

Declaration

public static Image Openslideload(string filename, out int flags, bool? memory = default(bool? ), string access = null, int? level = default(int? ), bool? autocrop = default(bool? ), bool? fail = default(bool? ), string associated = null)

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	level	Load this level from the file
System.Nullable<System.Boolean>	autocrop	Crop to image bounds
System.Nullable<System.Boolean>	fail	Fail on first error
System.String	associated	Load this associated image

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Openslideload(filename, out var flags, memory: bool, access: string, level: int, autocrop: bool, fail: bool, associated: string);

Openslideload(String, Nullable<Boolean>, String, Nullable<Int32>, Nullable<Boolean>, Nullable<Boolean>, String)

Load file with OpenSlide

Declaration

public static Image Openslideload(string filename, bool? memory = default(bool? ), string access = null, int? level = default(int? ), bool? autocrop = default(bool? ), bool? fail = default(bool? ), string associated = null)

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	level	Load this level from the file
System.Nullable<System.Boolean>	autocrop	Crop to image bounds
System.Nullable<System.Boolean>	fail	Fail on first error
System.String	associated	Load this associated image

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Openslideload(filename, memory: bool, access: string, level: int, autocrop: bool, fail: bool, associated: string);

Pdfload(String, out Int32, Nullable<Boolean>, String, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, Nullable<Double>, Nullable<Double>, Double[])

Load PDF with libpoppler

Declaration

public static Image Pdfload(string filename, out int flags, bool? memory = default(bool? ), string access = null, int? page = default(int? ), int? n = default(int? ), bool? fail = default(bool? ), double? dpi = default(double? ), double? scale = default(double? ), double[] background = null)

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	page	Load this page from the file
System.Nullable<System.Int32>	n	Load this many pages
System.Nullable<System.Boolean>	fail	Fail on first error
System.Nullable<System.Double>	dpi	Render at this DPI
System.Nullable<System.Double>	scale	Scale output by this factor
System.Double[]	background	Background value

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Pdfload(filename, out var flags, memory: bool, access: string, page: int, n: int, fail: bool, dpi: double, scale: double, background: double[]);

Pdfload(String, Nullable<Boolean>, String, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, Nullable<Double>, Nullable<Double>, Double[])

Load PDF with libpoppler

Declaration

public static Image Pdfload(string filename, bool? memory = default(bool? ), string access = null, int? page = default(int? ), int? n = default(int? ), bool? fail = default(bool? ), double? dpi = default(double? ), double? scale = default(double? ), double[] background = null)

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	page	Load this page from the file
System.Nullable<System.Int32>	n	Load this many pages
System.Nullable<System.Boolean>	fail	Fail on first error
System.Nullable<System.Double>	dpi	Render at this DPI
System.Nullable<System.Double>	scale	Scale output by this factor
System.Double[]	background	Background value

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Pdfload(filename, memory: bool, access: string, page: int, n: int, fail: bool, dpi: double, scale: double, background: double[]);

PdfloadBuffer(Byte[], out Int32, Nullable<Boolean>, String, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, Nullable<Double>, Nullable<Double>, Double[])

Load PDF with libpoppler

Declaration

public static Image PdfloadBuffer(byte[] buffer, out int flags, bool? memory = default(bool? ), string access = null, int? page = default(int? ), int? n = default(int? ), bool? fail = default(bool? ), double? dpi = default(double? ), double? scale = default(double? ), double[] background = null)

Parameters

Type	Name	Description
System.Byte[]	buffer	Buffer to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	page	Load this page from the file
System.Nullable<System.Int32>	n	Load this many pages
System.Nullable<System.Boolean>	fail	Fail on first error
System.Nullable<System.Double>	dpi	Render at this DPI
System.Nullable<System.Double>	scale	Scale output by this factor
System.Double[]	background	Background value

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.PdfloadBuffer(buffer, out var flags, memory: bool, access: string, page: int, n: int, fail: bool, dpi: double, scale: double, background: double[]);

PdfloadBuffer(Byte[], Nullable<Boolean>, String, Nullable<Int32>, Nullable<Int32>, Nullable<Boolean>, Nullable<Double>, Nullable<Double>, Double[])

Load PDF with libpoppler

Declaration

public static Image PdfloadBuffer(byte[] buffer, bool? memory = default(bool? ), string access = null, int? page = default(int? ), int? n = default(int? ), bool? fail = default(bool? ), double? dpi = default(double? ), double? scale = default(double? ), double[] background = null)

Parameters

Type	Name	Description
System.Byte[]	buffer	Buffer to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Int32>	page	Load this page from the file
System.Nullable<System.Int32>	n	Load this many pages
System.Nullable<System.Boolean>	fail	Fail on first error
System.Nullable<System.Double>	dpi	Render at this DPI
System.Nullable<System.Double>	scale	Scale output by this factor
System.Double[]	background	Background value

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.PdfloadBuffer(buffer, memory: bool, access: string, page: int, n: int, fail: bool, dpi: double, scale: double, background: double[]);

Percent(Double)

Find threshold for percent of pixels

Declaration

public int Percent(double percent)

Parameters

Type	Name	Description
System.Double	percent	Percent of pixels

Returns

Type	Description
System.Int32	A int

Examples

int threshold = in.Percent(percent);

Perlin(Int32, Int32, Nullable<Int32>, Nullable<Boolean>)

Make a perlin noise image

Declaration

public static Image Perlin(int width, int height, int? cellSize = default(int? ), bool? uchar = default(bool? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Nullable<System.Int32>	cellSize	Size of Perlin cells
System.Nullable<System.Boolean>	uchar	Output an unsigned char image

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Perlin(width, height, cellSize: int, uchar: bool);

Phasecor(Image)

Calculate phase correlation

Declaration

public Image Phasecor(Image in2)

Parameters

Type	Name	Description
Image	in2	Second input image

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Phasecor(in2);

Pngload(String, out Int32, Nullable<Boolean>, String, Nullable<Boolean>)

Load png from file

Declaration

public static Image Pngload(string filename, out int flags, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Pngload(filename, out var flags, memory: bool, access: string, fail: bool);

Pngload(String, Nullable<Boolean>, String, Nullable<Boolean>)

Load png from file

Declaration

public static Image Pngload(string filename, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Pngload(filename, memory: bool, access: string, fail: bool);

PngloadBuffer(Byte[], out Int32, Nullable<Boolean>, String, Nullable<Boolean>)

Load png from buffer

Declaration

public static Image PngloadBuffer(byte[] buffer, out int flags, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.Byte[]	buffer	Buffer to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.PngloadBuffer(buffer, out var flags, memory: bool, access: string, fail: bool);

PngloadBuffer(Byte[], Nullable<Boolean>, String, Nullable<Boolean>)

Load png from buffer

Declaration

public static Image PngloadBuffer(byte[] buffer, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.Byte[]	buffer	Buffer to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.PngloadBuffer(buffer, memory: bool, access: string, fail: bool);

Pngsave(String, Nullable<Int32>, Nullable<Boolean>, Nullable<Int32>, String, Nullable<Int32>, Nullable<Boolean>, Nullable<Int32>, Nullable<Int32>, Nullable<Double>, Nullable<Boolean>, Double[])

Save image to png file

Declaration

public void Pngsave(string filename, int? compression = default(int? ), bool? interlace = default(bool? ), int? pageHeight = default(int? ), string profile = null, int? filter = default(int? ), bool? palette = default(bool? ), int? colours = default(int? ), int? q = default(int? ), double? dither = default(double? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.String	filename	Filename to save to
System.Nullable<System.Int32>	compression	Compression factor
System.Nullable<System.Boolean>	interlace	Interlace image
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.String	profile	ICC profile to embed
System.Nullable<System.Int32>	filter	libpng row filter flag(s)
System.Nullable<System.Boolean>	palette	Quantise to 8bpp palette
System.Nullable<System.Int32>	colours	Max number of palette colours
System.Nullable<System.Int32>	q	Quantisation quality
System.Nullable<System.Double>	dither	Amount of dithering
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Examples

in.Pngsave(filename, compression: int, interlace: bool, pageHeight: int, profile: string, filter: int, palette: bool, colours: int, q: int, dither: double, strip: bool, background: double[]);

PngsaveBuffer(Nullable<Int32>, Nullable<Boolean>, Nullable<Int32>, String, Nullable<Int32>, Nullable<Boolean>, Nullable<Int32>, Nullable<Int32>, Nullable<Double>, Nullable<Boolean>, Double[])

Save image to png buffer

Declaration

public byte[] PngsaveBuffer(int? compression = default(int? ), bool? interlace = default(bool? ), int? pageHeight = default(int? ), string profile = null, int? filter = default(int? ), bool? palette = default(bool? ), int? colours = default(int? ), int? q = default(int? ), double? dither = default(double? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.Nullable<System.Int32>	compression	Compression factor
System.Nullable<System.Boolean>	interlace	Interlace image
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.String	profile	ICC profile to embed
System.Nullable<System.Int32>	filter	libpng row filter flag(s)
System.Nullable<System.Boolean>	palette	Quantise to 8bpp palette
System.Nullable<System.Int32>	colours	Max number of palette colours
System.Nullable<System.Int32>	q	Quantisation quality
System.Nullable<System.Double>	dither	Amount of dithering
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Returns

Type	Description
System.Byte[]	An array of bytes

Examples

byte[] buffer = in.PngsaveBuffer(compression: int, interlace: bool, pageHeight: int, profile: string, filter: int, palette: bool, colours: int, q: int, dither: double, strip: bool, background: double[]);

Polar()

Return an image converted to polar coordinates.

Declaration

public Image Polar()

Returns

Type	Description
Image	A new Image

Ppmload(String, out Int32, Nullable<Boolean>, String, Nullable<Boolean>)

Load ppm from file

Declaration

public static Image Ppmload(string filename, out int flags, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Ppmload(filename, out var flags, memory: bool, access: string, fail: bool);

Ppmload(String, Nullable<Boolean>, String, Nullable<Boolean>)

Load ppm from file

Declaration

public static Image Ppmload(string filename, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Ppmload(filename, memory: bool, access: string, fail: bool);

Ppmsave(String, Nullable<Int32>, Nullable<Boolean>, Nullable<Boolean>, Nullable<Boolean>, Double[])

Save image to ppm file

Declaration

public void Ppmsave(string filename, int? pageHeight = default(int? ), bool? ascii = default(bool? ), bool? squash = default(bool? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.String	filename	Filename to save to
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.Nullable<System.Boolean>	ascii	save as ascii
System.Nullable<System.Boolean>	squash	save as one bit
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Examples

in.Ppmsave(filename, pageHeight: int, ascii: bool, squash: bool, strip: bool, background: double[]);

Premultiply(Nullable<Double>)

Premultiply image alpha

Declaration

public Image Premultiply(double? maxAlpha = default(double? ))

Parameters

Type	Name	Description
System.Nullable<System.Double>	maxAlpha	Maximum value of alpha channel

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Premultiply(maxAlpha: double);

Profile()

Find image profiles

Declaration

public object[] Profile()

Returns

Type	Description
System.Object[]	An array of objects

Examples

var output = in.Profile();

Project()

Find image projections

Declaration

public object[] Project()

Returns

Type	Description
System.Object[]	An array of objects

Examples

var output = in.Project();

Quadratic(Image, GObject)

Resample an image with a quadratic transform

Declaration

public Image Quadratic(Image coeff, GObject interpolate = null)

Parameters

Type	Name	Description
Image	coeff	Coefficient matrix
GObject	interpolate	Interpolate values with this

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Quadratic(coeff, interpolate: GObject);

Rad2float()

Unpack Radiance coding to float RGB

Declaration

public Image Rad2float()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Rad2float();

Radload(String, out Int32, Nullable<Boolean>, String, Nullable<Boolean>)

Load a Radiance image from a file

Declaration

public static Image Radload(string filename, out int flags, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Radload(filename, out var flags, memory: bool, access: string, fail: bool);

Radload(String, Nullable<Boolean>, String, Nullable<Boolean>)

Load a Radiance image from a file

Declaration

public static Image Radload(string filename, bool? memory = default(bool? ), string access = null, bool? fail = default(bool? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Boolean>	fail	Fail on first error

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Radload(filename, memory: bool, access: string, fail: bool);

Radsave(String, Nullable<Int32>, Nullable<Boolean>, Double[])

Save image to Radiance file

Declaration

public void Radsave(string filename, int? pageHeight = default(int? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.String	filename	Filename to save to
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Examples

in.Radsave(filename, pageHeight: int, strip: bool, background: double[]);

RadsaveBuffer(Nullable<Int32>, Nullable<Boolean>, Double[])

Save image to Radiance buffer

Declaration

public byte[] RadsaveBuffer(int? pageHeight = default(int? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Returns

Type	Description
System.Byte[]	An array of bytes

Examples

byte[] buffer = in.RadsaveBuffer(pageHeight: int, strip: bool, background: double[]);

Rank(Int32, Int32, Int32)

Rank filter

Declaration

public Image Rank(int width, int height, int index)

Parameters

Type	Name	Description
System.Int32	width	Window width in pixels
System.Int32	height	Window height in pixels
System.Int32	index	Select pixel at index

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Rank(width, height, index);

Rawsave(String, Nullable<Int32>, Nullable<Boolean>, Double[])

Save image to raw file

Declaration

public void Rawsave(string filename, int? pageHeight = default(int? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.String	filename	Filename to save to
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Examples

in.Rawsave(filename, pageHeight: int, strip: bool, background: double[]);

RawsaveFd(Int32, Nullable<Int32>, Nullable<Boolean>, Double[])

Write raw image to file descriptor

Declaration

public void RawsaveFd(int fd, int? pageHeight = default(int? ), bool? strip = default(bool? ), double[] background = null)

Parameters

Type	Name	Description
System.Int32	fd	File descriptor to write to
System.Nullable<System.Int32>	pageHeight	Set page height for multipage save
System.Nullable<System.Boolean>	strip	Strip all metadata from image
System.Double[]	background	Background value

Examples

in.RawsaveFd(fd, pageHeight: int, strip: bool, background: double[]);

Real()

Return the real part of a complex image.

Declaration

public Image Real()

Returns

Type	Description
Image	A new Image

Recomb(Image)

Linear recombination with matrix

Declaration

public Image Recomb(Image m)

Parameters

Type	Name	Description
Image	m	matrix of coefficients

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Recomb(m);

Rect()

Return an image converted to rectangular coordinates.

Declaration

public Image Rect()

Returns

Type	Description
Image	A new Image

Reduce(Double, Double, String, Nullable<Boolean>)

Reduce an image

Declaration

public Image Reduce(double hshrink, double vshrink, string kernel = null, bool? centre = default(bool? ))

Parameters

Type	Name	Description
System.Double	hshrink	Horizontal shrink factor
System.Double	vshrink	Vertical shrink factor
System.String	kernel	Resampling kernel
System.Nullable<System.Boolean>	centre	Use centre sampling convention

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Reduce(hshrink, vshrink, kernel: string, centre: bool);

Reduceh(Double, String, Nullable<Boolean>)

Shrink an image horizontally

Declaration

public Image Reduceh(double hshrink, string kernel = null, bool? centre = default(bool? ))

Parameters

Type	Name	Description
System.Double	hshrink	Horizontal shrink factor
System.String	kernel	Resampling kernel
System.Nullable<System.Boolean>	centre	Use centre sampling convention

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Reduceh(hshrink, kernel: string, centre: bool);

Reducev(Double, String, Nullable<Boolean>)

Shrink an image vertically

Declaration

public Image Reducev(double vshrink, string kernel = null, bool? centre = default(bool? ))

Parameters

Type	Name	Description
System.Double	vshrink	Vertical shrink factor
System.String	kernel	Resampling kernel
System.Nullable<System.Boolean>	centre	Use centre sampling convention

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Reducev(vshrink, kernel: string, centre: bool);

Relational(Image, String)

Relational operation on two images

Declaration

public Image Relational(Image right, string relational)

Parameters

Type	Name	Description
Image	right	Right-hand image argument
System.String	relational	relational to perform

Returns

Type	Description
Image	A new Image

Examples

Image @out = left.Relational(right, relational);

RelationalConst(String, Double[])

Relational operations against a constant

Declaration

public Image RelationalConst(string relational, double[] c)

Parameters

Type	Name	Description
System.String	relational	relational to perform
System.Double[]	c	Array of constants

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.RelationalConst(relational, c);

Remainder(Image)

Remainder after integer division of two images

Declaration

public Image Remainder(Image right)

Parameters

Type	Name	Description
Image	right	Right-hand image argument

Returns

Type	Description
Image	A new Image

Examples

Image @out = left.Remainder(right);

RemainderConst(Double[])

Remainder after integer division of an image and a constant

Declaration

public Image RemainderConst(double[] c)

Parameters

Type	Name	Description
System.Double[]	c	Array of constants

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.RemainderConst(c);

Remove(String)

Remove an item of metadata.

Declaration

public bool Remove(string name)

Parameters

Type	Name	Description
System.String	name	The name of the piece of metadata to remove.

Returns

Type	Description
System.Boolean

Remarks

The named metadata item is removed.

Replicate(Int32, Int32)

Replicate an image

Declaration

public Image Replicate(int across, int down)

Parameters

Type	Name	Description
System.Int32	across	Repeat this many times horizontally
System.Int32	down	Repeat this many times vertically

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Replicate(across, down);

Resize(Double, String, Nullable<Double>)

Resize an image

Declaration

public Image Resize(double scale, string kernel = null, double? vscale = default(double? ))

Parameters

Type	Name	Description
System.Double	scale	Scale image by this factor
System.String	kernel	Resampling kernel
System.Nullable<System.Double>	vscale	Vertical scale image by this factor

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Resize(scale, kernel: string, vscale: double);

Rint()

Return the nearest integral value.

Declaration

public Image Rint()

Returns

Type	Description
Image	A new Image

Rot(String)

Rotate an image

Declaration

public Image Rot(string angle)

Parameters

Type	Name	Description
System.String	angle	Angle to rotate image

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Rot(angle);

Rot180()

Rotate 180 degrees.

Declaration

public Image Rot180()

Returns

Type	Description
Image	A new Image

Rot270()

Rotate 270 degrees clockwise.

Declaration

public Image Rot270()

Returns

Type	Description
Image	A new Image

Rot45(String)

Rotate an image

Declaration

public Image Rot45(string angle = null)

Parameters

Type	Name	Description
System.String	angle	Angle to rotate image

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Rot45(angle: string);

Rot90()

Rotate 90 degrees clockwise.

Declaration

public Image Rot90()

Returns

Type	Description
Image	A new Image

Rotate(Double, GObject, Double[], Nullable<Double>, Nullable<Double>, Nullable<Double>, Nullable<Double>)

Rotate an image by a number of degrees

Declaration

public Image Rotate(double angle, GObject interpolate = null, double[] background = null, double? odx = default(double? ), double? ody = default(double? ), double? idx = default(double? ), double? idy = default(double? ))

Parameters

Type	Name	Description
System.Double	angle	Rotate anticlockwise by this many degrees
GObject	interpolate	Interpolate pixels with this
System.Double[]	background	Background value
System.Nullable<System.Double>	odx	Horizontal output displacement
System.Nullable<System.Double>	ody	Vertical output displacement
System.Nullable<System.Double>	idx	Horizontal input displacement
System.Nullable<System.Double>	idy	Vertical input displacement

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Rotate(angle, interpolate: GObject, background: double[], odx: double, ody: double, idx: double, idy: double);

Round(String)

Perform a round function on an image

Declaration

public Image Round(string round)

Parameters

Type	Name	Description
System.String	round	rounding operation to perform

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Round(round);

ScaleImage(Nullable<Double>, Nullable<Boolean>)

Scale an image to 0 - 255.

Declaration

public Image ScaleImage(double? exp = default(double? ), bool? log = default(bool? ))

Parameters

Type	Name	Description
System.Nullable<System.Double>	exp	Exponent for log scale
System.Nullable<System.Boolean>	log	Log scale

Returns

Type	Description
Image	A new Image

Remarks

This is the libvips scale operation, renamed to avoid a clash with the scale for convolution masks.

Examples

Image @out = in.Scale(exp: double, log: bool);

ScRGB2BW(Nullable<Int32>)

Convert scRGB to BW

Declaration

public Image ScRGB2BW(int? depth = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	depth	Output device space depth in bits

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.ScRGB2BW(depth: int);

ScRGB2sRGB(Nullable<Int32>)

Convert an scRGB image to sRGB

Declaration

public Image ScRGB2sRGB(int? depth = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	depth	Output device space depth in bits

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.ScRGB2sRGB(depth: int);

ScRGB2XYZ()

Transform scRGB to XYZ

Declaration

public Image ScRGB2XYZ()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.ScRGB2XYZ();

Sequential(Nullable<Int32>)

Check sequential access

Declaration

public Image Sequential(int? tileHeight = default(int? ))

Parameters

Type	Name	Description
System.Nullable<System.Int32>	tileHeight	Tile height in pixels

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Sequential(tileHeight: int);

Set(String, Object)

Set the value of an item of metadata.

Declaration

public override void Set(string name, object value)

Parameters

Type	Name	Description
System.String	name	The name of the piece of metadata to set the value of.
System.Object	value	The value to set as a C# value. It is converted to the type of the metadata item, if possible.

Overrides

VipsObject.Set(String, Object)

Remarks

Sets the value of an item of metadata. The metadata item must already exist.

Exceptions

Type	Condition
System.Exception	If metadata item name does not exist.

SetType(IntPtr, String, Object)

Set the type and value of an item of metadata.

Declaration

public void SetType(IntPtr gtype, string name, object value)

Parameters

Type	Name	Description
System.IntPtr	gtype	The GType of the metadata item to create.
System.String	name	The name of the piece of metadata to create.
System.Object	value	The value to set as a C# value. It is converted to the GType, if possible.

Remarks

Sets the type and value of an item of metadata. Any old item of the same name is removed. See GValue for types.

Sharpen(Nullable<Double>, Nullable<Double>, Nullable<Double>, Nullable<Double>, Nullable<Double>, Nullable<Double>)

Unsharp masking for print

Declaration

public Image Sharpen(double? sigma = default(double? ), double? x1 = default(double? ), double? y2 = default(double? ), double? y3 = default(double? ), double? m1 = default(double? ), double? m2 = default(double? ))

Parameters

Type	Name	Description
System.Nullable<System.Double>	sigma	Sigma of Gaussian
System.Nullable<System.Double>	x1	Flat/jaggy threshold
System.Nullable<System.Double>	y2	Maximum brightening
System.Nullable<System.Double>	y3	Maximum darkening
System.Nullable<System.Double>	m1	Slope for flat areas
System.Nullable<System.Double>	m2	Slope for jaggy areas

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Sharpen(sigma: double, x1: double, y2: double, y3: double, m1: double, m2: double);

Shrink(Double, Double)

Shrink an image

Declaration

public Image Shrink(double hshrink, double vshrink)

Parameters

Type	Name	Description
System.Double	hshrink	Horizontal shrink factor
System.Double	vshrink	Vertical shrink factor

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Shrink(hshrink, vshrink);

Shrinkh(Int32)

Shrink an image horizontally

Declaration

public Image Shrinkh(int hshrink)

Parameters

Type	Name	Description
System.Int32	hshrink	Horizontal shrink factor

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Shrinkh(hshrink);

Shrinkv(Int32)

Shrink an image vertically

Declaration

public Image Shrinkv(int vshrink)

Parameters

Type	Name	Description
System.Int32	vshrink	Vertical shrink factor

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Shrinkv(vshrink);

Sign()

Unit vector of pixel

Declaration

public Image Sign()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Sign();

Similarity(Nullable<Double>, Nullable<Double>, GObject, Double[], Nullable<Double>, Nullable<Double>, Nullable<Double>, Nullable<Double>)

Similarity transform of an image

Declaration

public Image Similarity(double? scale = default(double? ), double? angle = default(double? ), GObject interpolate = null, double[] background = null, double? odx = default(double? ), double? ody = default(double? ), double? idx = default(double? ), double? idy = default(double? ))

Parameters

Type	Name	Description
System.Nullable<System.Double>	scale	Scale by this factor
System.Nullable<System.Double>	angle	Rotate anticlockwise by this many degrees
GObject	interpolate	Interpolate pixels with this
System.Double[]	background	Background value
System.Nullable<System.Double>	odx	Horizontal output displacement
System.Nullable<System.Double>	ody	Vertical output displacement
System.Nullable<System.Double>	idx	Horizontal input displacement
System.Nullable<System.Double>	idy	Vertical input displacement

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Similarity(scale: double, angle: double, interpolate: GObject, background: double[], odx: double, ody: double, idx: double, idy: double);

Sin()

Return the sine of an image in degrees.

Declaration

public Image Sin()

Returns

Type	Description
Image	A new Image

Sines(Int32, Int32, Nullable<Boolean>, Nullable<Double>, Nullable<Double>)

Make a 2D sine wave

Declaration

public static Image Sines(int width, int height, bool? uchar = default(bool? ), double? hfreq = default(double? ), double? vfreq = default(double? ))

Parameters

Type	Name	Description
System.Int32	width	Image width in pixels
System.Int32	height	Image height in pixels
System.Nullable<System.Boolean>	uchar	Output an unsigned char image
System.Nullable<System.Double>	hfreq	Horizontal spatial frequency
System.Nullable<System.Double>	vfreq	Vertical spatial frequency

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Sines(width, height, uchar: bool, hfreq: double, vfreq: double);

Smartcrop(Int32, Int32, String)

Extract an area from an image

Declaration

public Image Smartcrop(int width, int height, string interesting = null)

Parameters

Type	Name	Description
System.Int32	width	Width of extract area
System.Int32	height	Height of extract area
System.String	interesting	How to measure interestingness

Returns

Type	Description
Image	A new Image

Examples

Image @out = input.Smartcrop(width, height, interesting: string);

Sobel()

Sobel edge detector

Declaration

public Image Sobel()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Sobel();

Spcor(Image)

Spatial correlation

Declaration

public Image Spcor(Image ref)

Parameters

Type	Name	Description
Image	ref	Input reference image

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Spcor(@ref);

Spectrum()

Make displayable power spectrum

Declaration

public Image Spectrum()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Spectrum();

SRGB2HSV()

Transform sRGB to HSV

Declaration

public Image SRGB2HSV()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.SRGB2HSV();

SRGB2scRGB()

Convert an sRGB image to scRGB

Declaration

public Image SRGB2scRGB()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.SRGB2scRGB();

Stats()

Find many image stats

Declaration

public Image Stats()

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Stats();

Stdif(Int32, Int32, Nullable<Double>, Nullable<Double>, Nullable<Double>, Nullable<Double>)

Statistical difference

Declaration

public Image Stdif(int width, int height, double? s0 = default(double? ), double? b = default(double? ), double? m0 = default(double? ), double? a = default(double? ))

Parameters

Type	Name	Description
System.Int32	width	Window width in pixels
System.Int32	height	Window height in pixels
System.Nullable<System.Double>	s0	New deviation
System.Nullable<System.Double>	b	Weight of new deviation
System.Nullable<System.Double>	m0	New mean
System.Nullable<System.Double>	a	Weight of new mean

Returns

Type	Description
Image	A new Image

Examples

Image @out = in.Stdif(width, height, s0: double, b: double, m0: double, a: double);

Subsample(Int32, Int32, Nullable<Boolean>)

Subsample an image

Declaration

public Image Subsample(int xfac, int yfac, bool? point = default(bool? ))

Parameters

Type	Name	Description
System.Int32	xfac	Horizontal subsample factor
System.Int32	yfac	Vertical subsample factor
System.Nullable<System.Boolean>	point	Point sample

Returns

Type	Description
Image	A new Image

Examples

Image @out = input.Subsample(xfac, yfac, point: bool);

Subtract(Image)

Subtract two images

Declaration

public Image Subtract(Image right)

Parameters

Type	Name	Description
Image	right	Right-hand image argument

Returns

Type	Description
Image	A new Image

Examples

Image @out = left.Subtract(right);

Sum(Image[])

Sum an array of images

Declaration

public static Image Sum(Image[] in)

Parameters

Type	Name	Description
Image[]	in	Array of input images

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Sum(@in);

Svgload(String, out Int32, Nullable<Boolean>, String, Nullable<Double>, Nullable<Boolean>, Nullable<Double>)

Load SVG with rsvg

Declaration

public static Image Svgload(string filename, out int flags, bool? memory = default(bool? ), string access = null, double? dpi = default(double? ), bool? fail = default(bool? ), double? scale = default(double? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Double>	dpi	Render at this DPI
System.Nullable<System.Boolean>	fail	Fail on first error
System.Nullable<System.Double>	scale	Scale output by this factor

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Svgload(filename, out var flags, memory: bool, access: string, dpi: double, fail: bool, scale: double);

Svgload(String, Nullable<Boolean>, String, Nullable<Double>, Nullable<Boolean>, Nullable<Double>)

Load SVG with rsvg

Declaration

public static Image Svgload(string filename, bool? memory = default(bool? ), string access = null, double? dpi = default(double? ), bool? fail = default(bool? ), double? scale = default(double? ))

Parameters

Type	Name	Description
System.String	filename	Filename to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Double>	dpi	Render at this DPI
System.Nullable<System.Boolean>	fail	Fail on first error
System.Nullable<System.Double>	scale	Scale output by this factor

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Svgload(filename, memory: bool, access: string, dpi: double, fail: bool, scale: double);

SvgloadBuffer(Byte[], out Int32, Nullable<Boolean>, String, Nullable<Double>, Nullable<Boolean>, Nullable<Double>)

Load SVG with rsvg

Declaration

public static Image SvgloadBuffer(byte[] buffer, out int flags, bool? memory = default(bool? ), string access = null, double? dpi = default(double? ), bool? fail = default(bool? ), double? scale = default(double? ))

Parameters

Type	Name	Description
System.Byte[]	buffer	Buffer to load from
System.Int32	flags	Flags for this file
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Double>	dpi	Render at this DPI
System.Nullable<System.Boolean>	fail	Fail on first error
System.Nullable<System.Double>	scale	Scale output by this factor

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.SvgloadBuffer(buffer, out var flags, memory: bool, access: string, dpi: double, fail: bool, scale: double);

SvgloadBuffer(Byte[], Nullable<Boolean>, String, Nullable<Double>, Nullable<Boolean>, Nullable<Double>)

Load SVG with rsvg

Declaration

public static Image SvgloadBuffer(byte[] buffer, bool? memory = default(bool? ), string access = null, double? dpi = default(double? ), bool? fail = default(bool? ), double? scale = default(double? ))

Parameters

Type	Name	Description
System.Byte[]	buffer	Buffer to load from
System.Nullable<System.Boolean>	memory	Force open via memory
System.String	access	Required access pattern for this file
System.Nullable<System.Double>	dpi	Render at this DPI
System.Nullable<System.Boolean>	fail	Fail on first error
System.Nullable<System.Double>	scale	Scale output by this factor

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.SvgloadBuffer(buffer, memory: bool, access: string, dpi: double, fail: bool, scale: double);

System(String, out Image, Image[], String, String)

Run an external command

Declaration

public static void System(string cmdFormat, out Image out, Image[] in = null, string outFormat = null, string inFormat = null)

Parameters

Type	Name	Description
System.String	cmdFormat	Command to run
Image	out	Output image
Image[]	in	Array of input images
System.String	outFormat	Format for output filename
System.String	inFormat	Format for input filename

Examples

NetVips.Image.System(cmdFormat, out var @out, @in: Image[], outFormat: string, inFormat: string);

System(String, out Image, out String, Image[], String, String)

Run an external command

Declaration

public static void System(string cmdFormat, out Image out, out string log, Image[] in = null, string outFormat = null, string inFormat = null)

Parameters

Type	Name	Description
System.String	cmdFormat	Command to run
Image	out	Output image
System.String	log	Command log
Image[]	in	Array of input images
System.String	outFormat	Format for output filename
System.String	inFormat	Format for input filename

Examples

NetVips.Image.System(cmdFormat, out var @out, out var log, @in: Image[], outFormat: string, inFormat: string);

System(String, Image[], String, String)

Run an external command

Declaration

public static void System(string cmdFormat, Image[] in = null, string outFormat = null, string inFormat = null)

Parameters

Type	Name	Description
System.String	cmdFormat	Command to run
Image[]	in	Array of input images
System.String	outFormat	Format for output filename
System.String	inFormat	Format for input filename

Examples

NetVips.Image.System(cmdFormat, @in: Image[], outFormat: string, inFormat: string);

Tan()

Return the tangent of an image in degrees.

Declaration

public Image Tan()

Returns

Type	Description
Image	A new Image

Text(String, out Int32, String, Nullable<Int32>, Nullable<Int32>, String, Nullable<Int32>, Nullable<Int32>, String)

Make a text image

Declaration

public static Image Text(string text, out int autofitDpi, string font = null, int? width = default(int? ), int? height = default(int? ), string align = null, int? dpi = default(int? ), int? spacing = default(int? ), string fontfile = null)

Parameters

Type	Name	Description
System.String	text	Text to render
System.Int32	autofitDpi	DPI selected by autofit
System.String	font	Font to render with
System.Nullable<System.Int32>	width	Maximum image width in pixels
System.Nullable<System.Int32>	height	Maximum image height in pixels
System.String	align	Align on the low, centre or high edge
System.Nullable<System.Int32>	dpi	DPI to render at
System.Nullable<System.Int32>	spacing	Line spacing
System.String	fontfile	Load this font file

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Text(text, out var autofitDpi, font: string, width: int, height: int, align: string, dpi: int, spacing: int, fontfile: string);

Text(String, String, Nullable<Int32>, Nullable<Int32>, String, Nullable<Int32>, Nullable<Int32>, String)

Make a text image

Declaration

public static Image Text(string text, string font = null, int? width = default(int? ), int? height = default(int? ), string align = null, int? dpi = default(int? ), int? spacing = default(int? ), string fontfile = null)

Parameters

Type	Name	Description
System.String	text	Text to render
System.String	font	Font to render with
System.Nullable<System.Int32>	width	Maximum image width in pixels
System.Nullable<System.Int32>	height	Maximum image height in pixels
System.String	align	Align on the low, centre or high edge
System.Nullable<System.Int32>	dpi	DPI to render at
System.Nullable<System.Int32>	spacing	Line spacing
System.String	fontfile	Load this font file

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Text(text, font: string, width: int, height: int, align: string, dpi: int, spacing: int, fontfile: string);

Thumbnail(String, Int32, Nullable<Int32>, String, Nullable<Boolean>, String, Nullable<Boolean>, String, String, String)

Generate thumbnail from file

Declaration

public static Image Thumbnail(string filename, int width, int? height = default(int? ), string size = null, bool? autoRotate = default(bool? ), string crop = null, bool? linear = default(bool? ), string importProfile = null, string exportProfile = null, string intent = null)

Parameters

Type	Name	Description
System.String	filename	Filename to read from
System.Int32	width	Size to this width
System.Nullable<System.Int32>	height	Size to this height
System.String	size	Only upsize, only downsize, or both
System.Nullable<System.Boolean>	autoRotate	Use orientation tags to rotate image upright
System.String	crop	Reduce to fill target rectangle, then crop
System.Nullable<System.Boolean>	linear	Reduce in linear light
System.String	importProfile	Fallback import profile
System.String	exportProfile	Fallback export profile
System.String	intent	Rendering intent

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.Thumbnail(filename, width, height: int, size: string, autoRotate: bool, crop: string, linear: bool, importProfile: string, exportProfile: string, intent: string);

ThumbnailBuffer(Byte[], Int32, Nullable<Int32>, String, Nullable<Boolean>, String, Nullable<Boolean>, String, String, String)

Generate thumbnail from buffer

Declaration

public static Image ThumbnailBuffer(byte[] buffer, int width, int? height = default(int? ), string size = null, bool? autoRotate = default(bool? ), string crop = null, bool? linear = default(bool? ), string importProfile = null, string exportProfile = null, string intent = null)

Parameters

Type	Name	Description
System.Byte[]	buffer	Buffer to load from
System.Int32	width	Size to this width
System.Nullable<System.Int32>	height	Size to this height
System.String	size	Only upsize, only downsize, or both
System.Nullable<System.Boolean>	autoRotate	Use orientation tags to rotate image upright
System.String	crop	Reduce to fill target rectangle, then crop
System.Nullable<System.Boolean>	linear	Reduce in linear light
System.String	importProfile	Fallback import profile
System.String	exportProfile	Fallback export profile
System.String	intent	Rendering intent

Returns

Type	Description
Image	A new Image

Examples

Image @out = NetVips.Image.ThumbnailBuffer(buffer, width, height: int, size: string, autoRotate: bool, crop: string, linear: bool, importProfile: string, exportProfile: string, intent: string);