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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkNrrdImageIOTest_h
#define itkNrrdImageIOTest_h
#include <fstream>
#include "itkImageRegionIterator.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkNrrdImageIO.h"
#include "itkImage.h"
#include "itkRandomImageSource.h"
template <typename TPixelType, unsigned int VImageDimension>
typename itk::Image<TPixelType, VImageDimension>::Pointer
itkNrrdImageIOTestGenerateRandomImage(unsigned int size)
{
typedef itk::Image<TPixelType, VImageDimension> ImageType;
typename itk::RandomImageSource<ImageType>::Pointer source
= itk::RandomImageSource<ImageType>::New();
typename ImageType::SizeType sz;
typename ImageType::SpacingType spacing;
typename ImageType::PointType origin;
for (unsigned int i = 0; i < VImageDimension; i++)
{
sz[i] = size;
spacing[i] = static_cast<float>(i+1);
origin[i] = static_cast<float>(i);
}
source->SetSize(sz);
source->SetOrigin(origin);
source->SetSpacing(spacing);
source->Update();
return (source->GetOutput());
}
template<typename TPixelType, unsigned int VImageDimension>
int itkNrrdImageIOTestReadWriteTest(std::string fn, unsigned int size,
std::string inputFile, bool compression=false)
{
typedef itk::Image<TPixelType, VImageDimension> ImageType;
typename itk::ImageFileReader<ImageType>::Pointer reader
= itk::ImageFileReader<ImageType>::New();
typename itk::ImageFileWriter<ImageType>::Pointer writer
= itk::ImageFileWriter<ImageType>::New();
itk::NrrdImageIO::Pointer io = itk::NrrdImageIO::New();
reader->SetImageIO(io);
writer->SetImageIO(io);
typename ImageType::Pointer image;
if (inputFile != "null")
{
typename itk::ImageFileReader<ImageType>::Pointer tmpReader
= itk::ImageFileReader<ImageType>::New();
tmpReader->SetImageIO(io);
tmpReader->SetFileName(inputFile.c_str());
try
{
tmpReader->Update();
std::cout << "DONE READING INPUT IMAGE" << std::endl;
}
catch(itk::ExceptionObject &e)
{
std::cerr << e << std::endl;
return EXIT_FAILURE;
}
image = tmpReader->GetOutput();
}
else
{
// Generate a random image.
image = itkNrrdImageIOTestGenerateRandomImage<TPixelType, VImageDimension>(size);
}
// Write, then read the image.
try
{
writer->SetFileName(fn.c_str());
if (compression==true)
{ writer->UseCompressionOn(); }
else
{ writer->UseCompressionOff();}
reader->SetFileName(fn.c_str());
//writer->SetFileName("testDebug.mhd");
//reader->SetFileName("testDebug.mhd");
}
catch(itk::ExceptionObject &e)
{
std::cerr << e << std::endl;
return EXIT_FAILURE;
}
writer->SetInput(image);
image->Print(std::cout);
std::cout << "----------" << std::endl;
try
{
writer->Update();
std::cout << "DONE WRITING TEST IMAGE" << std::endl;
reader->Update();
std::cout << "DONE READING TEST IMAGE" << std::endl;
}
catch (itk::ExceptionObject & e)
{
std::cerr << "Exception in file reader or writer " << std::endl;
std::cerr << e.GetDescription() << std::endl;
std::cerr << e.GetLocation() << std::endl;
return EXIT_FAILURE;
}
// Print the image information.
reader->GetOutput()->Print(std::cout);
std::cout << std::endl;
// Compare input and output images.
itk::ImageRegionIterator<ImageType> a(image, image->GetRequestedRegion());
itk::ImageRegionIterator<ImageType> b(reader->GetOutput(),
reader->GetOutput()->GetRequestedRegion());
for (a.GoToBegin(), b.GoToBegin(); ! a.IsAtEnd(); ++a, ++b)
{
if ( itk::Math::NotExactlyEquals(b.Get(), a.Get()) )
{
std::cerr << "At index " << b.GetIndex() << " value " << b.Get() << " should be " << a.Get() << std::endl;
return EXIT_FAILURE;
}
}
return EXIT_SUCCESS;
}
#endif // itkNrrdImageIOTest_h_
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