Power Law Adaptive Histogram Equalization. More...

#include <itkAdaptiveHistogramEqualizationImageFilter.h>

Inheritance diagram for itk::AdaptiveHistogramEqualizationImageFilter< TImageType >:

Collaboration diagram for itk::AdaptiveHistogramEqualizationImageFilter< TImageType >:

Public Types
typedef SmartPointer< const Self >	ConstPointer
typedef ImageType::SizeType	ImageSizeType
typedef TImageType	ImageType
typedef SmartPointer< Self >	Pointer
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.

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Adaptive histogram equalization

Definition at line 66 of file itkAdaptiveHistogramEqualizationImageFilter.h.

Member Typedef Documentation

template<class TImageType >

typedef SmartPointer< const Self > itk::AdaptiveHistogramEqualizationImageFilter< TImageType >::ConstPointer

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

Definition at line 77 of file itkAdaptiveHistogramEqualizationImageFilter.h.

template<class TImageType >

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

Definition at line 90 of file itkAdaptiveHistogramEqualizationImageFilter.h.

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

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

Definition at line 76 of file itkAdaptiveHistogramEqualizationImageFilter.h.

template<class TImageType >

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

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

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

Definition at line 75 of file itkAdaptiveHistogramEqualizationImageFilter.h.

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]

Definition at line 122 of file itkAdaptiveHistogramEqualizationImageFilter.h.

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:

itkAdaptiveHistogramEqualizationImageFilter.h

Public Types

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Private Member Functions

Private Attributes

Detailed Description

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

Member Typedef Documentation

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation

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