itk::HistogramToEntropyImageFilter< THistogram > Class Template Reference

The class takes a histogram as an input and gives the entropy image as the output. A pixel, at position I, in the output image is given by. More...

Inheritance diagram for itk::HistogramToEntropyImageFilter< THistogram >:

[legend]Collaboration diagram for itk::HistogramToEntropyImageFilter< THistogram >:


Public Types
typedef HistogramToEntropyImageFilter	Self
typedef SmartPointer< Self >	Pointer
typedef SmartPointer< const Self >	ConstPointer
Static Public Member Functions
Pointer	New ()
Protected Member Functions
	HistogramToEntropyImageFilter ()
virtual	~HistogramToEntropyImageFilter ()

Detailed Description

The class takes a histogram as an input and gives the entropy image as the output. A pixel, at position I, in the output image is given by.

$f(I) = -p \log_2 p$

where

$p = \frac{q_I}{\sum_{i \in I} q_I}$

where $q_I$ is the frequency of measurement vector, I.

$p$ is the frequency of a measurement vector by the sum of all frequencies = Probability of the the measurement vector

The output image is of type double.

This is useful in plotting the joint histograms during registration.

See also:: HistogramToImageFilter, HistogramToLogProbabilityImageFilter, HistogramToIntensityImageFilter, HistogramToProbabilityImageFilter

template<class THistogram>

itk::HistogramToEntropyImageFilter< THistogram >::HistogramToEntropyImageFilter ( ) [inline, protected]

Definition at line 116 of file itkHistogramToEntropyImageFilter.h.

template<class THistogram>

virtual itk::HistogramToEntropyImageFilter< THistogram >::~HistogramToEntropyImageFilter ( ) [inline, protected, virtual]

Definition at line 117 of file itkHistogramToEntropyImageFilter.h.

template<class THistogram>

Pointer itk::HistogramToEntropyImageFilter< THistogram >::New ( ) [static]

Method for creation through the object factory.
Reimplemented from itk::HistogramToImageFilter< THistogram, TFunction >.

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

Generated at Thu May 25 01:09:21 2006 for ITK by