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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkMetaImageStreamingWriterIOTest.cxx,v $
Language: C++
Date: $Date: 2008-02-12 19:34:22 $
Version: $Revision: 1.4 $
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
#ifdef __BORLANDC__
#define ITK_LEAN_AND_MEAN
#endif
#include <fstream>
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkMetaImageIO.h"
int itkMetaImageStreamingWriterIOTest(int ac, char* av[])
{
if(ac<3)
{
std::cerr << "Usage: " << av[0] << " input output" << std::endl;
}
// We remove the output file
itksys::SystemTools::RemoveFile(av[2]);
typedef unsigned char PixelType;
typedef itk::Image<PixelType,3> ImageType;
itk::MetaImageIO::Pointer metaImageIO = itk::MetaImageIO::New();
typedef itk::ImageFileReader<ImageType> ReaderType;
typedef itk::ImageFileWriter< ImageType > WriterType;
ReaderType::Pointer reader = ReaderType::New();
reader->SetImageIO(metaImageIO);
reader->SetFileName(av[1]);
reader->SetUseStreaming(true);
metaImageIO->SetUseStreamedReading(true);
ImageType::RegionType region;
ImageType::SizeType size;
ImageType::SizeType fullsize;
ImageType::IndexType index;
unsigned int m_NumberOfPieces = 10;
// We decide how we want to read the image and we split accordingly
// The image is read slice by slice
reader->GenerateOutputInformation();
fullsize = reader->GetOutput()->GetLargestPossibleRegion().GetSize();
index.Fill(0);
size[0] = fullsize[0];
size[1] = fullsize[1];
size[2] = 0;
unsigned int zsize = fullsize[2]/m_NumberOfPieces;
// Setup the writer
WriterType::Pointer writer = WriterType::New();
writer->SetFileName(av[2]);
for(unsigned int i=0;i<m_NumberOfPieces;i++)
{
std::cout << "Reading piece " << i+1 << " of " << m_NumberOfPieces << std::endl;
index[2] += size[2];
// At the end we need to adjust the size to make sure
// we are reading everything
if(i == m_NumberOfPieces-1)
{
size[2] = fullsize[2]-index[2];
}
else
{
size[2] = zsize;
}
region.SetIndex(index);
region.SetSize(size);
reader->GetOutput()->SetRequestedRegion(region);
try
{
reader->Update();
}
catch (itk::ExceptionObject &ex)
{
std::cout << "ERROR : " << ex << std::endl;
return EXIT_FAILURE;
}
// Write the image
itk::ImageIORegion ioregion(3);
itk::ImageIORegion::IndexType index2;
index2.push_back(region.GetIndex()[0]);
index2.push_back(region.GetIndex()[1]);
index2.push_back(region.GetIndex()[2]);
ioregion.SetIndex(index2);
itk::ImageIORegion::SizeType size2;
size2.push_back(region.GetSize()[0]);
size2.push_back(region.GetSize()[1]);
size2.push_back(region.GetSize()[2]);
ioregion.SetSize(size2);
writer->SetIORegion(ioregion);
writer->SetInput(reader->GetOutput());
try
{
writer->Update();
}
catch( itk::ExceptionObject & err )
{
std::cerr << "ExceptionObject caught !" << std::endl;
std::cerr << err << std::endl;
return EXIT_FAILURE;
}
} // end for pieces
return EXIT_SUCCESS;
}
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