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DitherCommand Class

This command is used for converting color or gray images to black and white using halftoning techniques to simulate gray in the final image. This command operates best on photographic images.

Dithering is done using either Ordered Dithering or Floyd-Steinberg Error Diffusion dithering.

With Ordered Dithering, the dithering matrix is fully replaceable and can be made to simulate custom halftone screens.

Inheritance Hierarchy
SystemObject
  Atalasoft.Imaging.ImageProcessingImageCommand
    Atalasoft.Imaging.ImageProcessing.DocumentDitherCommand

Namespace:  Atalasoft.Imaging.ImageProcessing.Document
Assembly:  Atalasoft.dotImage (in Atalasoft.dotImage.dll) Version: 11.0.0.0.0.297 (.NET 4.5.2, x86)
Syntax
[SerializableAttribute]
public class DitherCommand : ImageCommand, 
	ISerializable

The DitherCommand type exposes the following members.

Constructors
  NameDescription
Public methodDitherCommand
Constructs a new DitherCommand to convert multi-bit images to 1 bit per pixel images using ordered dithering as the method.
Public methodDitherCommand(DitheringMethod)
Constructs a new DitherCommand to convert multi-bit images to 1 bit per pixel images using the supplied method.
Protected methodDitherCommand(SerializationInfo, StreamingContext)
Creates a new instance of DitherCommand from serialization information.
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Properties
  NameDescription
Public propertyApplyToAnyPixelFormat
Reports whether or not this command will be applied to any supplied PixelFormat image
(Inherited from ImageCommand.)
Public propertyCanApplyToAnyPixelFormat
Returns true if the command can be applied to any PixelFormat.
(Inherited from ImageCommand.)
Public propertyInPlaceProcessing
Gets a value indicating if the source image data is processed in-place as opposed to returning a new image.
(Inherited from ImageCommand.)
Public propertyMatrix
Gets or sets the matrix to use for ordered dithering. The matrix must have either 4, 16, 64, or 256 elements in it representing 2x2, 4x4, 8x8 or 16x16 matrices, respectively.
Public propertyMethod
Set or get the method to be used for dithering.
Public propertyProgress
Gets or sets the ProgressEventHandler delegate which can be used to view or cancel the progress of the current process.
(Inherited from ImageCommand.)
Public propertySerpentine
Set or get whether or not Floyd Steinberg dithering will operate in alternating left to right/right to left patterns or simply left to right.
Public propertyStatic memberStandard16x16
Returns a standard 16x16 ordered dithering matrix.
Public propertyStatic memberStandard2x2
Returns a standard 2x2 ordered dithering matrix.
Public propertyStatic memberStandard4x4
Returns a standard 4x4 ordered dithering matrix.
Public propertyStatic memberStandard8x8
Returns a standard 8x8 ordered dithering matrix.
Public propertySupportedPixelFormats
Returns the set of PixelFormats that are supported by this image command.
(Overrides ImageCommandSupportedPixelFormats.)
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Methods
  NameDescription
Public methodApply
Apply the command to the given image.
(Inherited from ImageCommand.)
Public methodApplyToImage Obsolete.
Applies the command to the source AtalaImage.
(Inherited from ImageCommand.)
Protected methodConstructChangedSourceImage
The method is called by the default implementation of Apply. It determines if it is necessary to create a copy of the source image in a different pixel format and if so, determines the best new pixel format and allocates that image.
(Inherited from ImageCommand.)
Protected methodConstructFinalImage
Called by the default implementation of Apply, ConstructFinalImage constructs the image that will be used as the destination image for the command.
(Overrides ImageCommandConstructFinalImage(AtalaImage).)
Protected methodConstructImageResults
Constructs the results object for this command.
(Inherited from ImageCommand.)
Public methodEquals
Determines whether the specified object is equal to the current object.
(Inherited from Object.)
Protected methodFinalize
Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.
(Inherited from Object.)
Protected methodGetChangedPixelFormat
This method is called to change the pixel format of the source image.
(Inherited from ImageCommand.)
Public methodGetHashCode
Serves as the default hash function.
(Inherited from Object.)
Public methodGetObjectData
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Protected methodImageCommandGetObjectData
Aggregates ImageCommand data into the supplied SerializationInfo object.
(Inherited from ImageCommand.)
Public methodIsPixelFormatSupported
Returns a value indicating if the specified pixel format is supported.
(Inherited from ImageCommand.)
Protected methodMemberwiseClone
Creates a shallow copy of the current Object.
(Inherited from Object.)
Protected methodPerformActualCommand
PerformActualCommand does the actual work of the image processing command.
(Overrides ImageCommandPerformActualCommand(AtalaImage, AtalaImage, Rectangle, ImageResults).)
Protected methodSelectBestAlternatePixelFormat
Choose the best pixel format to use for this command when the supplied source image's pixel format is unacceptable.
(Inherited from ImageCommand.)
Protected methodSelectPreferredPixelFormat
Chooses a pixel format that is preferred for this command.
(Inherited from ImageCommand.)
Public methodToString
Returns a string that represents the current object.
(Inherited from Object.)
Protected methodVerifyImage
Verify the integrity of an AtalaImage.
(Inherited from ImageCommand.)
Protected methodVerifyProperties
Verify the integrity of properties in the command before processing an image.
(Overrides ImageCommandVerifyProperties(AtalaImage).)
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See Also