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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.
*
*=========================================================================*/
#include "itkImageFileWriter.h"
#include "itkImageFileReader.h"
#include "itkTimeProbesCollectorBase.h"
int itkLargeImageWriteConvertReadTest(int ac, char* av[])
{
if (ac < 3)
{
std::cout << "usage: itkIOTests itkLargeImageWriteConvertReadTest outputFileName numberOfPixelsInOneDimension" << std::endl;
return EXIT_FAILURE;
}
typedef unsigned char OutputPixelType;
typedef itk::Image<OutputPixelType,2> OutputImageType;
typedef itk::Image<unsigned short,2> InputImageType;
typedef itk::ImageFileWriter< OutputImageType > WriterType;
typedef itk::ImageFileReader< InputImageType > ReaderType;
itk::TimeProbesCollectorBase chronometer;
{ // begin write block
OutputImageType::Pointer image = OutputImageType::New();
OutputImageType::RegionType region;
OutputImageType::IndexType index;
OutputImageType::SizeType size;
const size_t numberOfPixelsInOneDimension = atol( av[2] );
size.Fill( static_cast<OutputImageType::SizeValueType>( numberOfPixelsInOneDimension ) );
index.Fill(0);
region.SetSize(size);
region.SetIndex(index);
image->SetRegions(region);
chronometer.Start("Allocate");
image->Allocate();
chronometer.Stop("Allocate");
std::cout << "Initializing pixel values " << std::endl;
typedef itk::ImageRegionIterator< OutputImageType > IteratorType;
IteratorType itr( image, region );
itr.GoToBegin();
OutputPixelType pixelValue = itk::NumericTraits< OutputPixelType >::ZeroValue();
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
{
WriterType::Pointer writer = WriterType::New();
writer->SetInput(image);
writer->SetFileName(av[1]);
chronometer.Start("Write");
writer->Update();
chronometer.Stop("Write");
}
catch (itk::ExceptionObject &ex)
{
std::cout << ex << std::endl;
return EXIT_FAILURE;
}
} // end writing block so data is freed
std::cout << "Trying to read the image back from disk" << std::endl;
ReaderType::Pointer reader = ReaderType::New();
reader->SetFileName(av[1]);
try
{
chronometer.Start("Read");
reader->Update();
chronometer.Stop("Read");
}
catch (itk::ExceptionObject &ex)
{
std::cout << ex << std::endl;
return EXIT_FAILURE;
}
InputImageType::ConstPointer readImage = reader->GetOutput();
chronometer.Report( std::cout );
std::cout << std::endl;
std::cout << "Test PASSED !" << std::endl;
return EXIT_SUCCESS;
}
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