Lookup class for histogram intensity matching. More...

#include <cmtkTypedArrayFunctionHistogramMatching.h>

Inheritance diagram for cmtk::TypedArrayFunctionHistogramMatching:

Collaboration diagram for cmtk::TypedArrayFunctionHistogramMatching:

Public Types
typedef TypedArrayFunctionHistogramMatching	Self
	This class.
typedef Histogram< unsigned int >	HistogramType
	Histogram type.
Public Member Functions
	TypedArrayFunctionHistogramMatching (const TypedArray &variableArray, const TypedArray &fixedArray, const size_t numberOfHistogramBins=Self::DefaultNumberOfHistogramBins)
	Constructor: build lookup from two data arrays.
	TypedArrayFunctionHistogramMatching (const Self::HistogramType &variableHistogram, const Self::HistogramType &fixedHistogram)
	Constructor: build lookup from two histograms.
virtual Types::DataItem	operator() (const Types::DataItem valueIn) const
	Map a single value from the variable array to its new value.
Static Public Attributes
static const size_t	DefaultNumberOfHistogramBins = 1024
	Default number of histogram bins.
Private Member Functions
void	CreateLookup ()
	Create lookup from histograms.
Private Attributes
HistogramType::SmartPtr	m_FixedArrayHistogram
	Fixed array histogram.
HistogramType::SmartPtr	m_VariableArrayHistogram
	Variable array histogram.
std::vector< unsigned int >	m_Lookup
	Lookup table that translates between the two histograms.

Detailed Description

Lookup class for histogram intensity matching.

This class provides a lookup table that is computed from the histograms of two cmtk::TypedArray objects. The lookup can then be applied to the "variable" array so that its distribution afterwards matches, as closely as possible, the distribution of the "fixed" array.

To apply histogram matching to "variableArray" based on the distribution of "fixedArray", use the following:

  variableArray->ApplyFunction( cmtk::TypedArrayFunctionHistogramMatching( variableArray, fixedArray ) );
 *

The variable array for setting up the matching function need not be the same as the array that the function is applied to:

  variableArray->ApplyFunction( cmtk::TypedArrayFunctionHistogramMatching( testArray, fixedArray ) );
 *

Inherit from base class.

Definition at line 66 of file cmtkTypedArrayFunctionHistogramMatching.h.

Member Typedef Documentation

typedef Histogram<unsigned int> cmtk::TypedArrayFunctionHistogramMatching::HistogramType

Histogram type.

Definition at line 79 of file cmtkTypedArrayFunctionHistogramMatching.h.

typedef TypedArrayFunctionHistogramMatching cmtk::TypedArrayFunctionHistogramMatching::Self

This class.

Definition at line 73 of file cmtkTypedArrayFunctionHistogramMatching.h.

Constructor & Destructor Documentation

cmtk::TypedArrayFunctionHistogramMatching::TypedArrayFunctionHistogramMatching	(	const TypedArray &	variableArray,
		const TypedArray &	fixedArray,
		const size_t	numberOfHistogramBins = `Self::DefaultNumberOfHistogramBins`
	)

Constructor: build lookup from two data arrays.

Definition at line 39 of file cmtkTypedArrayFunctionHistogramMatching.cxx.

References cmtk::Histogram< T >::ConvertToCumulative(), and cmtk::TypedArray::GetHistogram().

cmtk::TypedArrayFunctionHistogramMatching::TypedArrayFunctionHistogramMatching	(	const Self::HistogramType &	variableHistogram,
		const Self::HistogramType &	fixedHistogram
	)