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/*=========================================================================
*
* Copyright NumFOCUS
*
* 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
*
* https://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"
#include "itkTestingMacros.h"
int
itkLargeImageWriteConvertReadTest(int argc, char * argv[])
{
if (argc < 3)
{
std::cout << "Usage: " << itkNameOfTestExecutableMacro(argv) << " outputFileName numberOfPixelsInOneDimension"
<< std::endl;
return EXIT_FAILURE;
}
using OutputPixelType = unsigned char;
using OutputImageType = itk::Image<OutputPixelType, 2>;
using InputImageType = itk::Image<unsigned short, 2>;
using WriterType = itk::ImageFileWriter<OutputImageType>;
using ReaderType = itk::ImageFileReader<InputImageType>;
itk::TimeProbesCollectorBase chronometer;
{ // begin write block
auto image = OutputImageType::New();
OutputImageType::RegionType region;
OutputImageType::IndexType index;
OutputImageType::SizeType size;
const size_t numberOfPixelsInOneDimension = atol(argv[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;
using IteratorType = itk::ImageRegionIterator<OutputImageType>;
IteratorType itr(image, region);
itr.GoToBegin();
OutputPixelType pixelValue{};
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
{
auto writer = WriterType::New();
writer->SetInput(image);
writer->SetFileName(argv[1]);
chronometer.Start("Write");
writer->Update();
chronometer.Stop("Write");
}
catch (const 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;
auto reader = ReaderType::New();
reader->SetFileName(argv[1]);
try
{
chronometer.Start("Read");
reader->Update();
chronometer.Stop("Read");
}
catch (const 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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