Computes histogram-based statistics: Uniformity, UPP, Entropy, and Median. More...

#include <mitkHistogramStatisticsCalculator.h>

Public Types
typedef double	MeasurementType
	Measurement type used for histogram bins and statistics values. More...

typedef itk::Statistics::Histogram< MeasurementType >	HistogramType
	Histogram type used as input. More...

Public Member Functions
	HistogramStatisticsCalculator ()
	Default constructor. Initializes all statistics to zero. More...

void	SetHistogram (HistogramType::Pointer histogram)
	Set the histogram from which to compute statistics. More...

MeasurementType	GetUPP ()
	Get the Uniformity of Positive Pixels (UPP). More...

MeasurementType	GetUniformity ()
	Get the Uniformity of the histogram distribution. More...

MeasurementType	GetEntropy ()
	Get the Shannon entropy of the histogram distribution. More...

MeasurementType	GetMedian ()
	Get the approximated median from the histogram. More...

void	CalculateStatistics ()
	Compute all histogram statistics (Uniformity, UPP, Entropy, Median). More...

Detailed Description

Computes histogram-based statistics: Uniformity, UPP, Entropy, and Median.

This class takes an itk::Statistics::Histogram<double> as input and computes the following statistics from it:

Uniformity: sum of squared bin frequencies (normalized).
UPP (Uniformity of Positive Pixels): uniformity computed only over bins with positive measurement values.
Entropy: Shannon entropy of the histogram distribution.
Median: approximation of the median from histogram bin boundaries.

Call SetHistogram() followed by CalculateStatistics() before querying results.

See also: ImageStatisticsCalculator; ImageStatisticsContainer

Definition at line 39 of file mitkHistogramStatisticsCalculator.h.

Member Typedef Documentation

◆ HistogramType

typedef itk::Statistics::Histogram<MeasurementType> mitk::HistogramStatisticsCalculator::HistogramType

Histogram type used as input.

Definition at line 45 of file mitkHistogramStatisticsCalculator.h.

◆ MeasurementType

typedef double mitk::HistogramStatisticsCalculator::MeasurementType

Measurement type used for histogram bins and statistics values.

Definition at line 43 of file mitkHistogramStatisticsCalculator.h.

Constructor & Destructor Documentation

◆ HistogramStatisticsCalculator()

mitk::HistogramStatisticsCalculator::HistogramStatisticsCalculator ( )

Default constructor. Initializes all statistics to zero.

Member Function Documentation

◆ CalculateStatistics()

void mitk::HistogramStatisticsCalculator::CalculateStatistics ( )

Compute all histogram statistics (Uniformity, UPP, Entropy, Median).

Precondition: A histogram must have been set via SetHistogram().

◆ GetEntropy()

MeasurementType mitk::HistogramStatisticsCalculator::GetEntropy ( )

Get the Shannon entropy of the histogram distribution.

Returns: The Entropy value.

Precondition: CalculateStatistics() must have been called.

◆ GetMedian()

MeasurementType mitk::HistogramStatisticsCalculator::GetMedian ( )

Get the approximated median from the histogram.

Returns: The Median value.

Precondition: CalculateStatistics() must have been called.

◆ GetUniformity()

MeasurementType mitk::HistogramStatisticsCalculator::GetUniformity ( )

Get the Uniformity of the histogram distribution.

Returns: The Uniformity value (sum of squared normalized bin frequencies).

Precondition: CalculateStatistics() must have been called.

◆ GetUPP()

MeasurementType mitk::HistogramStatisticsCalculator::GetUPP ( )

Get the Uniformity of Positive Pixels (UPP).

Returns: The UPP value computed from the histogram.

Precondition: CalculateStatistics() must have been called.

◆ SetHistogram()

void mitk::HistogramStatisticsCalculator::SetHistogram ( HistogramType::Pointer histogram )

Set the histogram from which to compute statistics.

Parameters

[in] histogram Pointer to an itk::Statistics::Histogram<double>.

Precondition: histogram must not be nullptr.

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

mitkHistogramStatisticsCalculator.h

Public Types

Public Member Functions