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HalftoneRemovalCommand Class

Detects and removes shaded regions from bi-tonal images.
Inheritance Hierarchy

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

The HalftoneRemovalCommand type exposes the following members.

Constructors
  NameDescription
Public methodHalftoneRemovalCommand
Initializes a new instance of the HalftoneRemovalCommand class
Protected methodHalftoneRemovalCommand(SerializationInfo, StreamingContext)
Initializes a new instance of the HalftoneRemovalCommand class
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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 propertyMinRegionSize
The minimum region size that will be detected as halftone.
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 propertyRegionOfInterest

Gets or sets a RegionOfInterest which will only process the indicated region of the image.

(Inherited from ImageRegionCommand.)
Public propertySpeedFactor
Determines the sample size of the image to process, affecting quality and speed.
Public propertySupportedPixelFormats
Gets a list of PixelFormats that this command will support without throwing an exception. This command supports Pixel1bppIndexed only.
(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.
(Inherited from ImageCommand.)
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 (Overrides ImageRegionCommandGetObjectData(SerializationInfo, StreamingContext).)
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 (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 (Overrides ImageCommandVerifyProperties(AtalaImage).)
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Remarks

Halftone removal is designed for regions that originate as shaded color or grayscale areas that when thresholded to black and white, end up with a halftone texture. OCR engines generally cannot recognize text that is surrounded by halftoning. This command can be used as pre-processing prior to OCR for improved OCR accuracy.

When applying this command, the resulting ImageResults is an instance of HalftoneRemovalResults containing the rectangular boundary of each detected halftone region.

See Also

Reference

HalftoneRemovalResults Class