ITK  4.1.0
Insight Segmentation and Registration Toolkit
Public Types | Public Member Functions | Static Public Member Functions | Static Public Attributes | Protected Member Functions | Private Member Functions | Private Attributes
itk::AdaptiveHistogramEqualizationImageFilter< TImageType > Class Template Reference

#include <itkAdaptiveHistogramEqualizationImageFilter.h>

+ Inheritance diagram for itk::AdaptiveHistogramEqualizationImageFilter< TImageType >:
+ Collaboration diagram for itk::AdaptiveHistogramEqualizationImageFilter< TImageType >:

List of all members.

Public Types

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

Public Member Functions

virtual ::itk::LightObject::Pointer CreateAnother (void) const
virtual const char * GetNameOfClass () const
virtual void SetAlpha (float _arg)
virtual float GetAlpha () const
virtual void SetBeta (float _arg)
virtual float GetBeta () const

Static Public Member Functions

static Pointer New ()

Static Public Attributes

static const unsigned int ImageDimension = TImageType::ImageDimension

Protected Member Functions

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

Private Member Functions

 AdaptiveHistogramEqualizationImageFilter (const Self &)
void operator= (const Self &)
float CumulativeFunction (float u, float v)

Private Attributes

float m_Alpha
float m_Beta
bool m_UseLookupTable
virtual void SetUseLookupTable (bool _arg)
virtual bool GetUseLookupTable () const
virtual void UseLookupTableOn ()
virtual void UseLookupTableOff ()
 AdaptiveHistogramEqualizationImageFilter ()

Detailed Description

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

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.

Wiki Examples:

Definition at line 66 of file itkAdaptiveHistogramEqualizationImageFilter.h.


Member Typedef Documentation

template<class TImageType >
typedef SmartPointer< const Self > itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::ConstPointer
template<class TImageType >
typedef ImageType::SizeType itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::ImageSizeType
template<class TImageType >
typedef TImageType itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::ImageType

Image type typedef support.

Definition at line 86 of file itkAdaptiveHistogramEqualizationImageFilter.h.

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

Standard class typedefs

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

Definition at line 74 of file itkAdaptiveHistogramEqualizationImageFilter.h.

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

Constructor & Destructor Documentation

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

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

Definition at line 113 of file itkAdaptiveHistogramEqualizationImageFilter.h.

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

Member Function Documentation

template<class TImageType >
virtual::itk::LightObject::Pointer itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::CreateAnother ( void  ) const [virtual]

Create an object from an instance, potentially deferring to a factory. This method allows you to create an instance of an object that is exactly the same type as the referring object. This is useful in cases where an object has been cast back to a base class.

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

template<class TImageType >
float itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::CumulativeFunction ( float  u,
float  v 
) [private]

A function which is used in GenerateData().

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

Standard pipeline method

Reimplemented from itk::ImageSource< TImageType >.

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

Run-time type information (and related methods).

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

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

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

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

Method for creation through the object factory.

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

template<class TImageType >
void itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::operator= ( const Self ) [private]

PushBackInput(), PushFronInput() in the public section force the input to be the type expected by an ImageToImageFilter. However, these methods end of "hiding" the versions from the superclass (ProcessObject) whose arguments are DataObjects. Here, we re-expose the versions from ProcessObject to avoid warnings about hiding methods from the superclass.

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

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::BoxImageFilter< 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 >::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.


Member Data Documentation

template<class TImageType >
const unsigned int itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::ImageDimension = TImageType::ImageDimension [static]

Image related typedefs.

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

Definition at line 80 of file itkAdaptiveHistogramEqualizationImageFilter.h.

template<class TImageType >
float itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::m_Alpha [private]

The beta parameter of the AdaptiveHistogramEqualization.

Definition at line 138 of file itkAdaptiveHistogramEqualizationImageFilter.h.

template<class TImageType >
float itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::m_Beta [private]

The alpha parameter of the AdaptiveHistogramEqualization.

Definition at line 141 of file itkAdaptiveHistogramEqualizationImageFilter.h.

template<class TImageType >
bool itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::m_UseLookupTable [private]

Should we use a lookup table to optimize the use of the intensity mapping function?

Definition at line 145 of file itkAdaptiveHistogramEqualizationImageFilter.h.


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