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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkLargeImageWriteReadTest.cxx,v $
Language: C++
Date: $Date: 2010-01-28 15:48:48 $xgoto-l
Version: $Revision: 1.8 $
Copyright (c) 2002 Insight 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 "itkImageFileWriter.h"
#include "itkImageFileReader.h"
#include "itkImageRegionIterator.h"
#include "itkTimeProbesCollectorBase.h"
namespace {
template <typename TImageType>
int ActualTest( std::string filename, typename TImageType::SizeType size )
{
typedef TImageType ImageType;
typedef typename ImageType::PixelType PixelType;
typedef itk::ImageFileWriter< ImageType > WriterType;
typedef itk::ImageFileReader< ImageType > ReaderType;
typedef itk::ImageRegionIterator< ImageType > IteratorType;
typedef itk::ImageRegionConstIterator< ImageType > ConstIteratorType;
typename ImageType::RegionType region;
typename ImageType::IndexType index;
PixelType pixelValue;
itk::TimeProbesCollectorBase chronometer;
{ // begin write block
typename ImageType::Pointer image = ImageType::New();
index.Fill(0);
region.SetSize(size);
region.SetIndex(index);
image->SetRegions(region);
size_t numberOfPixels = 1;
for (unsigned int i = 0; i < ImageType::ImageDimension; ++i )
{
numberOfPixels *= region.GetSize( i );
}
const unsigned long sizeInMegaBytes = static_cast< unsigned long >(
( sizeof(PixelType) * numberOfPixels ) / ( 1024.0 * 1024.0 ) );
std::cout << "Trying to allocate an image of size " << sizeInMegaBytes << " Mb " << std::endl;
chronometer.Start("Allocate");
image->Allocate();
chronometer.Stop("Allocate");
std::cout << "Initializing pixel values " << std::endl;
IteratorType itr( image, region );
itr.GoToBegin();
pixelValue = itk::NumericTraits< PixelType >::Zero;
chronometer.Start("Initializing");
while( !itr.IsAtEnd() )
{
itr.Set( pixelValue );
++pixelValue;
++itr;
}
chronometer.Stop("Initializing");
std::cout << "Trying to write the image to disk" << std::endl;
try
{
typename WriterType::Pointer writer = WriterType::New();
writer->SetInput(image);
writer->SetFileName( filename );
chronometer.Start("Write");
writer->Update();
chronometer.Stop("Write");
}
catch (itk::ExceptionObject &ex)
{
std::cout << ex << std::endl;
return EXIT_FAILURE;
}
} // end write block to free the memory
std::cout << "Trying to read the image back from disk" << std::endl;
typename ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName( filename );
try
{
chronometer.Start("Read");
reader->Update();
chronometer.Stop("Read");
}
catch (itk::ExceptionObject &ex)
{
std::cout << ex << std::endl;
return EXIT_FAILURE;
}
typename ImageType::ConstPointer readImage = reader->GetOutput();
ConstIteratorType ritr( readImage, region );
// IteratorType oitr( image, region );
ritr.GoToBegin();
// oitr.GoToBegin();
std::cout << "Comparing the pixel values.. :" << std::endl;
pixelValue = itk::NumericTraits< PixelType >::Zero;
chronometer.Start("Compare");
while( !ritr.IsAtEnd() )
{
// if( ( oitr.Get() != ritr.Get() ) || ( oitr.Get() != pixelValue ) )
if( ritr.Get() != pixelValue )
{
std::cerr << "Pixel comparison failed at index = " << ritr.GetIndex() << std::endl;
std::cerr << "Expected pixel value " << pixelValue << std::endl;
// std::cerr << "Original Image pixel value " << oitr.Get() << std::endl;
std::cerr << "Read Image pixel value " << ritr.Get() << std::endl;
return EXIT_FAILURE;
}
++pixelValue;
// ++oitr;
++ritr;
}
chronometer.Stop("Compare");
chronometer.Report( std::cout );
std::cout << std::endl;
std::cout << "Test PASSED !" << std::endl;
return EXIT_SUCCESS;
}
}
int itkLargeImageWriteReadTest(int ac, char* argv[])
{
if (ac < 3)
{
std::cout << "usage: itkIOTests itkLargeImageWriteReadTest outputFileName numberOfPixelsInOneDimension [numberOfZslices]" << std::endl;
return EXIT_FAILURE;
}
const std::string filename = argv[1];
if ( ac == 3 )
{
const unsigned int Dimension = 2;
typedef unsigned short PixelType;
typedef itk::Image< PixelType, Dimension> ImageType;
ImageType::SizeType size;
size.Fill( atol( argv[2] ) );
return ActualTest< ImageType >( filename, size );
}
else
{
const unsigned int Dimension = 3;
typedef unsigned short PixelType;
typedef itk::Image< PixelType, Dimension> ImageType;
ImageType::SizeType size;
size.Fill( atol( argv[2] ) );
size[2] = atol( argv[3] );
return ActualTest< ImageType >( filename, size );
}
}
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