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itk::AdaptiveHistogramEqualizationImageFilter< TImageType > Class Template Reference
[Image Enhancement Filters]

#include <itkAdaptiveHistogramEqualizationImageFilter.h>

Inheritance diagram for itk::AdaptiveHistogramEqualizationImageFilter< TImageType >:

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Collaboration diagram for itk::AdaptiveHistogramEqualizationImageFilter< TImageType >:

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List of all members.

Public Types

typedef AdaptiveHistogramEqualizationImageFilter Self
typedef ImageToImageFilter<
TImageType, TImageType > 
Superclass
typedef SmartPointer< SelfPointer
typedef SmartPointer< const
Self
constPointer
typedef TImageType ImageType
typedef ImageType::SizeType ImageSizeType

Public Member Functions

 itkStaticConstMacro (ImageDimension, unsigned int, TImageType::ImageDimension)
virtual const char * GetClassName () const
virtual void SetAlpha (float _arg)
virtual float GetAlpha ()
virtual void SetBeta (float _arg)
virtual float GetBeta ()
virtual void SetRadius (ImageSizeType _arg)
virtual const ImageSizeTypeGetRadius ()
virtual void SetUseLookupTable (bool _arg)
virtual bool GetUseLookupTable ()
virtual void UseLookupTableOn ()
virtual void UseLookupTableOff ()

Static Public Member Functions

Pointer New ()

Protected Member Functions

 AdaptiveHistogramEqualizationImageFilter ()
virtual ~AdaptiveHistogramEqualizationImageFilter ()
void PrintSelf (std::ostream &os, Indent indent) const
void GenerateData ()
void GenerateInputRequestedRegion ()

Detailed Description

template<class TImageType>
class itk::AdaptiveHistogramEqualizationImageFilter< TImageType >

/class AdaptiveHistogramEqualizationImageFilter /brief Power Law Adaptive Histogram Equalization

Histogram equalization modifies the contrast in an image. The AdaptiveHistogramEqualizationImageFilter is a superset of many contrast enhancing filters. By modifying its parameters (alpha, beta, and window), the AdaptiveHistogramEqualizationImageFilter can produce an adaptively equalized histogram or a version of unsharp mask (local mean subtraction). Instead of applying a strict histogram equalization in a window about a pixel, this filter prescribes a mapping function (power law) controlled by the parameters alpha and beta.

The parameter alpha controls how much the filter acts like the classical histogram equalization method (alpha=0) to how much the filter acts like an unsharp mask (alpha=1).

The parameter beta controls how much the filter acts like an unsharp mask (beta=0) to much the filter acts like pass through (beta=1, with alpha=1).

The parameter window controls the size of the region over which local statistics are calculated.

By altering alpha, beta and window, a host of equalization and unsharp masking filters is available.

For detail description, reference "Adaptive Image Contrast Enhancement using Generalizations of Histogram Equalization." J.Alex Stark. IEEE Transactions on Image Processing, May 2000.

Definition at line 60 of file itkAdaptiveHistogramEqualizationImageFilter.h.


Member Typedef Documentation

template<class TImageType>
typedef SmartPointer<const Self> itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::constPointer
 

Definition at line 69 of file itkAdaptiveHistogramEqualizationImageFilter.h.

template<class TImageType>
typedef ImageType::SizeType itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::ImageSizeType
 

Definition at line 82 of file itkAdaptiveHistogramEqualizationImageFilter.h.

Referenced by itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::~AdaptiveHistogramEqualizationImageFilter().

template<class TImageType>
typedef TImageType itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::ImageType
 

Image type typedef support. Definition at line 81 of file itkAdaptiveHistogramEqualizationImageFilter.h.

template<class TImageType>
typedef SmartPointer<Self> itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::Pointer
 

Reimplemented from itk::ImageToImageFilter< TImageType, TImageType >.

Definition at line 68 of file itkAdaptiveHistogramEqualizationImageFilter.h.

template<class TImageType>
typedef AdaptiveHistogramEqualizationImageFilter itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::Self
 

Standard class typedefs.

Reimplemented from itk::ImageToImageFilter< TImageType, TImageType >.

Definition at line 66 of file itkAdaptiveHistogramEqualizationImageFilter.h.

Referenced by itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::~AdaptiveHistogramEqualizationImageFilter().

template<class TImageType>
typedef ImageToImageFilter< TImageType, TImageType > itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::Superclass
 

Reimplemented from itk::ImageToImageFilter< TImageType, TImageType >.

Definition at line 67 of file itkAdaptiveHistogramEqualizationImageFilter.h.


Constructor & Destructor Documentation

template<class TImageType>
itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::AdaptiveHistogramEqualizationImageFilter  )  [inline, protected]
 

Definition at line 114 of file itkAdaptiveHistogramEqualizationImageFilter.h.

template<class TImageType>
virtual itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::~AdaptiveHistogramEqualizationImageFilter  )  [inline, protected, virtual]
 

Definition at line 121 of file itkAdaptiveHistogramEqualizationImageFilter.h.

References itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::ImageSizeType, and itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::Self.


Member Function Documentation

template<class TImageType>
void itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::GenerateData  )  [protected, virtual]
 

Standard pipeline method.

Reimplemented from itk::ImageSource< TImageType >.

template<class TImageType>
void itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::GenerateInputRequestedRegion  )  [protected, virtual]
 

Adaptive histogram equalization requires more input that it outputs. It needs request an input region that is padded by the radius.

See also:
ProcessObject::GenerateInputRequestedRegion()

Reimplemented from itk::ImageToImageFilter< TImageType, TImageType >.

template<class TImageType>
virtual float itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::GetAlpha  )  [virtual]
 

Set/Get the value of alpha. Alpha=0 produces the adaptive histogram equalization (provided beta=0). Alpha=1 produces an unsharp mask. Default is 0.3.

template<class TImageType>
virtual float itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::GetBeta  )  [virtual]
 

Set/Get the value of beta. If beta=1 (and alpha=1), then the output image matches the input image. As beta approaches 0, the filter behaves as an unsharp mask. Default is 0.3.

template<class TImageType>
virtual const char* itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::GetClassName  )  const [virtual]
 

Run-time type information (and related methods).

Reimplemented from itk::ImageToImageFilter< TImageType, TImageType >.

template<class TImageType>
virtual const ImageSizeType& itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::GetRadius  )  [virtual]
 

Set/Get the radius of the neighborhood used to compute local statistics. Radius sizes of 10 and 20 are common. Default is a radius of 5.

template<class TImageType>
virtual bool itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::GetUseLookupTable  )  [virtual]
 

Set/Get whether an optimized lookup table for the intensity mapping function is used. Default is off.

template<class TImageType>
itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::itkStaticConstMacro ImageDimension  ,
unsigned  int,
TImageType::ImageDimension 
 

template<class TImageType>
Pointer itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::New  )  [static]
 

Method for creation through the object factory.

Reimplemented from itk::Object.

template<class TImageType>
void itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::PrintSelf std::ostream &  os,
Indent  indent
const [protected, virtual]
 

Methods invoked by Print() to print information about the object including superclasses. Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from itk::ImageToImageFilter< TImageType, TImageType >.

template<class TImageType>
virtual void itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::SetAlpha float  _arg  )  [virtual]
 

Set/Get the value of alpha. Alpha=0 produces the adaptive histogram equalization (provided beta=0). Alpha=1 produces an unsharp mask. Default is 0.3.

template<class TImageType>
virtual void itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::SetBeta float  _arg  )  [virtual]
 

Set/Get the value of beta. If beta=1 (and alpha=1), then the output image matches the input image. As beta approaches 0, the filter behaves as an unsharp mask. Default is 0.3.

template<class TImageType>
virtual void itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::SetRadius ImageSizeType  _arg  )  [virtual]
 

Set/Get the radius of the neighborhood used to compute local statistics. Radius sizes of 10 and 20 are common. Default is a radius of 5.

template<class TImageType>
virtual void itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::SetUseLookupTable bool  _arg  )  [virtual]
 

Set/Get whether an optimized lookup table for the intensity mapping function is used. Default is off.

template<class TImageType>
virtual void itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::UseLookupTableOff  )  [virtual]
 

Set/Get whether an optimized lookup table for the intensity mapping function is used. Default is off.

template<class TImageType>
virtual void itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::UseLookupTableOn  )  [virtual]
 

Set/Get whether an optimized lookup table for the intensity mapping function is used. Default is off.


The documentation for this class was generated from the following file:
Generated at Sat Mar 31 02:40:25 2007 for ITK by doxygen 1.3.8 written by Dimitri van Heesch, © 1997-2000