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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkHistogramToEntropyImageFilterTest2.cxx
Language: C++
Date: $Date$
Version: $Revision$
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 "itkImage.h"
#include "itkImageToHistogramFilter.h"
#include "itkMinimumMaximumImageFilter.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkJoinImageFilter.h"
#include "itkHistogramToEntropyImageFilter.h"
int itkHistogramToEntropyImageFilterTest2( int argc, char * argv [] )
{
if( argc < 3 )
{
std::cerr << "Missing command line arguments" << std::endl;
std::cerr << "Usage : " << argv[0] << " inputScalarImageFileName outputImage" << std::endl;
return EXIT_FAILURE;
}
const unsigned int Dimension = 2;
typedef unsigned char PixelComponentType;
typedef itk::Image< PixelComponentType, Dimension > ScalarImageType;
typedef itk::ImageFileReader< ScalarImageType > ReaderType;
ReaderType::Pointer reader1 = ReaderType::New();
ReaderType::Pointer reader2 = ReaderType::New();
reader1->SetFileName( argv[1] );
reader2->SetFileName( argv[2] );
try
{
reader1->Update();
reader2->Update();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << "Problem encoutered while reading image file : " << argv[1] << std::endl;
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
typedef itk::JoinImageFilter< ScalarImageType, ScalarImageType > JoinFilterType;
JoinFilterType::Pointer joinFilter = JoinFilterType::New();
typedef JoinFilterType::OutputImageType ArrayImageType;
joinFilter->SetInput1( reader1->GetOutput() );
joinFilter->SetInput2( reader2->GetOutput() );
typedef itk::Statistics::ImageToHistogramFilter< ArrayImageType >
HistogramFilterType;
typedef HistogramFilterType::HistogramMeasurementVectorType HistogramMeasurementVectorType;
const unsigned int NumberOfComponents = 2;
itk::MinimumMaximumImageFilter<ScalarImageType>::Pointer minmaxFilter
= itk::MinimumMaximumImageFilter<ScalarImageType>::New();
HistogramMeasurementVectorType imageMin( NumberOfComponents );
HistogramMeasurementVectorType imageMax( NumberOfComponents );
minmaxFilter->SetInput( reader1->GetOutput() );
minmaxFilter->Update();
imageMin[0] = minmaxFilter->GetMinimum();
imageMax[0] = minmaxFilter->GetMaximum();
minmaxFilter->SetInput( reader2->GetOutput() );
minmaxFilter->Update();
imageMin[1] = minmaxFilter->GetMinimum();
imageMax[1] = minmaxFilter->GetMaximum();
HistogramFilterType::Pointer histogramFilter = HistogramFilterType::New();
histogramFilter->SetInput( joinFilter->GetOutput() );
HistogramFilterType::HistogramSizeType numberOfBins( NumberOfComponents );
numberOfBins[0] = static_cast<unsigned int>( imageMax[0] - imageMin[0] + 1 );
numberOfBins[1] = static_cast<unsigned int>( imageMax[1] - imageMin[1] + 1 );
histogramFilter->SetHistogramSize( numberOfBins );
histogramFilter->SetMarginalScale(1.0);
histogramFilter->SetHistogramBinMinimum( imageMin );
histogramFilter->SetHistogramBinMaximum( imageMax );
histogramFilter->Update();
typedef HistogramFilterType::HistogramType HistogramType;
const HistogramType * histogram = histogramFilter->GetOutput();
typedef itk::HistogramToEntropyImageFilter< HistogramType, NumberOfComponents > HistogramToImageFilterType;
HistogramToImageFilterType::Pointer histogramToImageFilter = HistogramToImageFilterType::New();
histogramToImageFilter->SetInput( histogram );
typedef HistogramToImageFilterType::OutputImageType OutputImageType;
typedef itk::ImageFileWriter< OutputImageType > WriterType;
WriterType::Pointer writer = WriterType::New();
writer->SetFileName( argv[3] );
writer->SetInput( histogramToImageFilter->GetOutput() );
try
{
writer->Update();
}
catch( itk::ExceptionObject & excp )
{
std::cerr << excp << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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