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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkSampleToHistogramFilterTest4.cxx,v $
Language: C++
Date: $Date: 2009-05-08 16:31:08 $
Version: $Revision: 1.2 $
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#if defined(_MSC_VER)
#pragma warning ( disable : 4786 )
#endif
#include "itkArray.h"
#include "itkListSample.h"
#include "itkHistogram.h"
#include "itkSampleToHistogramFilter.h"
int itkSampleToHistogramFilterTest4( int, char * [] )
{
const unsigned int numberOfComponents = 3;
//
// Note:
//
// The following two types are made different here.
//
// The purpose of this test is to verify that the
// MeasurementVectorType can use an integer type for its
// components, while the Histogram can use a float type for
// it measurement type.
//
typedef signed int VMeasurementType; // integer type for the samples
typedef float HMeasurementType; // float type for the histogram
typedef itk::Array< VMeasurementType > MeasurementVectorType;
typedef itk::Statistics::ListSample< MeasurementVectorType > SampleType;
typedef itk::Statistics::Histogram< HMeasurementType,
itk::Statistics::DenseFrequencyContainer2 > HistogramType;
typedef itk::Statistics::SampleToHistogramFilter<
SampleType, HistogramType > FilterType;
typedef FilterType::InputHistogramSizeObjectType InputHistogramSizeObjectType;
typedef FilterType::HistogramSizeType HistogramSizeType;
typedef FilterType::HistogramMeasurementType HistogramMeasurementType;
typedef FilterType::HistogramMeasurementVectorType HistogramMeasurementVectorType;
typedef FilterType::InputHistogramMeasurementObjectType InputHistogramMeasurementObjectType;
typedef FilterType::
InputHistogramMeasurementVectorObjectType InputHistogramMeasurementVectorObjectType;
FilterType::Pointer filter = FilterType::New();
SampleType::Pointer sample = SampleType::New();
HistogramMeasurementVectorType minimum( numberOfComponents );
HistogramMeasurementVectorType maximum( numberOfComponents );
minimum[0] = -17.5;
minimum[1] = -19.5;
minimum[2] = -24.5;
maximum[0] = 17.5;
maximum[1] = 19.5;
maximum[2] = 24.5;
HistogramSizeType histogramSize( numberOfComponents );
histogramSize[0] = 36;
histogramSize[1] = 40;
histogramSize[2] = 50;
MeasurementVectorType measure( numberOfComponents );
sample->SetMeasurementVectorSize( numberOfComponents );
// Populate the Sample
for( unsigned int i=0; i < histogramSize[0]; i++ )
{
measure[0] = static_cast< VMeasurementType >( minimum[0] + i );
for( unsigned int j=0; j < histogramSize[1]; j++ )
{
measure[1] = static_cast< VMeasurementType >( minimum[1] + j );
for( unsigned int k=0; k < histogramSize[2]; k++ )
{
measure[2] = static_cast< VMeasurementType >( minimum[2] + k );
sample->PushBack( measure );
}
}
}
filter->SetInput( sample );
// Test exception when calling Update() without having
// defined the size of the histogram in the filter.
try
{
filter->Update();
std::cerr << "Failure to throw expected exception due to lack";
std::cerr << " of calling SetHistogramSize() in the filter ";
return EXIT_FAILURE;
}
catch( itk::ExceptionObject & )
{
std::cout << "Expected exception received" << std::endl;
}
const HistogramType * histogram = filter->GetOutput();
if( histogram->Size() != 0 )
{
std::cerr << "Histogram Size should have been zero" << std::endl;
return EXIT_FAILURE;
}
filter->SetHistogramSize( histogramSize );
try
{
filter->Update();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
const unsigned int expectedHistogramSize1 =
histogramSize[0] * histogramSize[1] * histogramSize[2];
if( histogram->Size() != expectedHistogramSize1 )
{
std::cerr << "Histogram Size error" << std::endl;
std::cerr << "We expected " << expectedHistogramSize1 << std::endl;
std::cerr << "We received " << histogram->Size() << std::endl;
return EXIT_FAILURE;
}
HistogramType::ConstIterator histogramItr = histogram->Begin();
HistogramType::ConstIterator histogramEnd = histogram->End();
const unsigned int expectedFrequency1 = 1;
while( histogramItr != histogramEnd )
{
if( histogramItr.GetFrequency() != expectedFrequency1 )
{
std::cerr << "Histogram bin error for measure " << std::endl;
std::cerr << histogramItr.GetMeasurementVector() << std::endl;
std::cerr << "Expected frequency = " << expectedFrequency1 << std::endl;
std::cerr << "Computed frequency = " << histogramItr.GetFrequency() << std::endl;
}
++histogramItr;
}
std::cout << "Test passed." << std::endl;
return EXIT_SUCCESS;
}
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