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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 "itkChangeInformationImageFilter.h"
#include "itkCyclicShiftImageFilter.h"
#include "itkImageFileReader.h"
#include <iostream>
#include "itkTestingMacros.h"
int
itkCyclicShiftImageFilterTest(int argc, char * argv[])
{
if (argc != 4)
{
std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv) << " inputImage shiftX shiftY" << std::endl;
return EXIT_FAILURE;
}
constexpr unsigned int Dimension = 2;
using PixelType = unsigned char;
using ImageType = itk::Image<PixelType, Dimension>;
using ReaderType = itk::ImageFileReader<ImageType>;
using ChangeInfoFilterType = itk::ChangeInformationImageFilter<ImageType>;
using CyclicShiftFilterType = itk::CyclicShiftImageFilter<ImageType>;
auto reader = ReaderType::New();
reader->SetFileName(argv[1]);
// Change the origin of the image to make sure we can handle that case.
ChangeInfoFilterType::OutputImageOffsetType newOrigin;
newOrigin[0] = -52;
newOrigin[1] = 37;
auto changeInfoFilter = ChangeInfoFilterType::New();
changeInfoFilter->ChangeRegionOn();
changeInfoFilter->SetOutputOffset(newOrigin);
changeInfoFilter->SetInput(reader->GetOutput());
CyclicShiftFilterType::OffsetType shift;
shift[0] = std::stoi(argv[2]);
shift[1] = std::stoi(argv[3]);
auto shiftFilter = CyclicShiftFilterType::New();
shiftFilter->SetShift(shift);
shiftFilter->SetInput(changeInfoFilter->GetOutput());
if (shift != shiftFilter->GetShift())
{
std::cerr << "Got unexpected shift " << shiftFilter->GetShift() << " from filter."
<< "Expected " << shift << std::endl;
return EXIT_FAILURE;
}
shiftFilter->Print(std::cout);
// Iterate over the input, map the indices to their indices in the
// output of the filter, and make sure the values match.
shiftFilter->UpdateLargestPossibleRegion();
itk::ImageRegionConstIteratorWithIndex<ImageType> inputIter(reader->GetOutput(),
reader->GetOutput()->GetLargestPossibleRegion());
ImageType::RegionType imageRegion = reader->GetOutput()->GetLargestPossibleRegion();
ImageType::SizeType imageSize = imageRegion.GetSize();
bool success = true;
const ImageType * shiftFilterOutput = shiftFilter->GetOutput();
for (; !inputIter.IsAtEnd(); ++inputIter)
{
ImageType::IndexType inputIndex = inputIter.GetIndex();
CyclicShiftFilterType::IndexType outputIndex(inputIndex);
for (unsigned int i = 0; i < Dimension; ++i)
{
outputIndex[i] = (outputIndex[i] + shift[i]) % imageSize[i];
if (outputIndex[i] < 0)
{
outputIndex[i] += imageSize[i];
}
outputIndex[i] += newOrigin[i];
}
PixelType inputPixel = inputIter.Get();
PixelType outputPixel = shiftFilterOutput->GetPixel(outputIndex);
if (inputPixel != outputPixel)
{
std::cerr << "Mismatch pixel value: inputIndex " << inputIter.GetIndex() << ", inputPixel "
<< static_cast<itk::NumericTraits<PixelType>::PrintType>(inputPixel) << ", outputIndex " << outputIndex
<< ", outputPixel " << static_cast<itk::NumericTraits<PixelType>::PrintType>(outputPixel) << std::endl;
success = false;
}
}
if (!success)
{
std::cerr << "Unexpected pixel mismatch(es)." << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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