SoHistogramEqualizationProcessing Class Reference
[Grayscale Transforms]

SoHistogramEqualizationProcessing engine More...

#include <ImageViz/Engines/ImageFiltering/GrayscaleTransforms/SoHistogramEqualizationProcessing.h>

Inheritance diagram for SoHistogramEqualizationProcessing:

List of all members.

Public Types
enum	RangeMode {   MIN_MAX = 0,   OTHER = 1 }
Public Member Functions
	SoHistogramEqualizationProcessing ()
Public Attributes
SoSFEnum	computeMode
SoSFImageDataAdapter	inImage
SoSFEnum	rangeMode
SoSFVec2i32	intensityRangeInput
SoSFVec2i32	intensityRangeOutput
SoImageVizEngineOutput < SoSFImageDataAdapter, SoImageDataAdapter * >	outImage

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Detailed Description

SoHistogramEqualizationProcessing engine

The SoHistogramEqualizationProcessing engine performs a histogram equalization.

This engine performs a histogram equalization of image I onto image O. For example, if an image contains n pixels and uses M gray values, there is an average of n/M pixels per gray level. An image is correctly contrasted if the number of pixels is closed to this mean value for each gray level value.

The aim of histogram equalization is to transform the histogram to make it uniform. In Figure a, the histogram is very condensed, and the image is poorly contrasted. In Figure b, the histogram is more widely distributed, and the image has a better contrast.

Histogram equalization

SEE ALSO

SoMatchContrastProcessing, SoBackgroundImageProcessing2d, SoMathematicalFunctionProcessing.

FILE FORMAT/DEFAULT

HistogramEqualizationProcessing {

computeMode	MODE_AUTO
inImage	NULL
rangeMode	MIN_MAX
intensityRangeInput	0 255
intensityRangeOutput	0 255

}

Library references: equalize

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Member Enumeration Documentation

enum SoHistogramEqualizationProcessing::RangeMode

Enumerator:

MIN_MAX	With this option the histogram is computed between the minimum and the maximum of the image.
OTHER	With this option the histogram is computed between user-defined bounds [a,b].

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Constructor & Destructor Documentation

SoHistogramEqualizationProcessing::SoHistogramEqualizationProcessing

(

)

Constructor.

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Member Data Documentation

SoSFEnum SoHistogramEqualizationProcessing::computeMode

Select the compute Mode (2D or 3D or AUTO) Use enum ComputeMode.

Default is MODE_AUTO

SoSFImageDataAdapter SoHistogramEqualizationProcessing::inImage

The input image.

Default value is NULL. Supported types include: grayscale binary label image.

SoSFVec2i32 SoHistogramEqualizationProcessing::intensityRangeInput

The input intensity range.

Default value is SbVec2i32(0,255).

SoSFVec2i32 SoHistogramEqualizationProcessing::intensityRangeOutput

The output intensity range.

Default value is SbVec2i32(0,255).

SoImageVizEngineOutput<SoSFImageDataAdapter,SoImageDataAdapter*> SoHistogramEqualizationProcessing::outImage

The output image.

Default value is NULL. Supported types include: grayscale binary label color image.

SoSFEnum SoHistogramEqualizationProcessing::rangeMode

Select the input intensity range mode.

Use enum RangeMode. Default is MIN_MAX

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The documentation for this class was generated from the following file:

• ImageViz/Engines/ImageFiltering/GrayscaleTransforms/SoHistogramEqualizationProcessing.h