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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 <fstream>
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkTestingComparisonImageFilter.h"
#include "itkExtractImageFilter.h"
#include "itkTestingMacros.h"
using PixelType = unsigned char;
using ImageType = itk::Image<PixelType, 3>;
using ImagePointer = ImageType::Pointer;
namespace
{
bool
SameImage(ImagePointer testImage, ImagePointer baselineImage)
{
PixelType intensityTolerance = 0;
int radiusTolerance = 0;
unsigned long numberOfPixelTolerance = 0;
using DiffType = itk::Testing::ComparisonImageFilter<ImageType, ImageType>;
auto diff = DiffType::New();
diff->SetValidInput(baselineImage);
diff->SetTestInput(testImage);
diff->SetDifferenceThreshold(intensityTolerance);
diff->SetToleranceRadius(radiusTolerance);
diff->UpdateLargestPossibleRegion();
unsigned long status = diff->GetNumberOfPixelsWithDifferences();
if (status > numberOfPixelTolerance)
{
return false;
}
return true;
}
} // namespace
int
itkImageFileWriterPastingTest3(int argc, char * argv[])
{
if (argc < 3)
{
std::cerr << "Missing parameters." << std::endl;
std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv);
std::cerr << " input output" << std::endl;
return EXIT_FAILURE;
}
// We remove the output file
if (argc == 3)
{
itksys::SystemTools::RemoveFile(argv[2]);
}
else
{
// copy this file to over write
itksys::SystemTools::CopyAFile(argv[3], argv[2]);
}
using ReaderType = itk::ImageFileReader<ImageType>;
using WriterType = itk::ImageFileWriter<ImageType>;
ImageType::Pointer image;
// update just a specific region
// Then let the reader go out of scope to orphan the image to have
// no source.
{
auto reader = ReaderType::New();
reader->SetFileName(argv[1]);
reader->SetUseStreaming(true);
reader->UpdateOutputInformation();
ImageType::RegionType largestRegion = reader->GetOutput()->GetLargestPossibleRegion();
ImageType::RegionType ioRegion;
ImageType::IndexType ioIndex;
ioIndex[0] = largestRegion.GetIndex()[0] + largestRegion.GetSize()[0] / 3;
ioIndex[1] = largestRegion.GetIndex()[1] + largestRegion.GetSize()[1] / 3;
ioIndex[2] = largestRegion.GetIndex()[2] + largestRegion.GetSize()[2] / 3;
ImageType::SizeType ioSize;
ioSize[0] = largestRegion.GetSize()[0] / 3;
ioSize[1] = largestRegion.GetSize()[1] / 3;
ioSize[2] = largestRegion.GetSize()[2] / 3;
ioRegion = ImageType::RegionType(ioIndex, ioSize);
image = reader->GetOutput();
image->SetRequestedRegion(ioRegion);
image->Update();
}
// Setup the writer with an image which doesn't have a source
//
// We expect that the writer should respect the LargestPossibleRegion
auto writer = WriterType::New();
writer->SetFileName(argv[2]);
writer->SetInput(image);
// convert the buffered region of the image into an io region
itk::ImageIORegion ioRegion(3);
itk::ImageIORegionAdaptor<ImageType::ImageDimension>::Convert(
image->GetBufferedRegion(), ioRegion, image->GetLargestPossibleRegion().GetIndex());
writer->SetIORegion(ioRegion);
ITK_TRY_EXPECT_NO_EXCEPTION(writer->Update());
auto reader = ReaderType::New();
reader->SetFileName(argv[1]);
reader->UpdateOutputInformation();
auto readerTestImage = ReaderType::New();
readerTestImage->SetFileName(argv[2]);
readerTestImage->UpdateOutputInformation();
// Test that the size of the two images are the same
if (reader->GetOutput()->GetLargestPossibleRegion() != readerTestImage->GetOutput()->GetLargestPossibleRegion())
{
std::cerr << "Image size don't match!" << std::endl;
std::cerr << "Input size: " << reader->GetOutput()->GetLargestPossibleRegion()
<< "Output size: " << readerTestImage->GetOutput()->GetLargestPossibleRegion() << std::endl;
return EXIT_FAILURE;
}
// compare the two subregions
using ExtractImageFilterType = itk::ExtractImageFilter<ImageType, ImageType>;
auto extractTestImage = ExtractImageFilterType::New();
extractTestImage->SetInput(readerTestImage->GetOutput());
extractTestImage->SetDirectionCollapseToSubmatrix();
extractTestImage->SetExtractionRegion(image->GetBufferedRegion());
extractTestImage->InPlaceOn();
using ExtractImageFilterType = itk::ExtractImageFilter<ImageType, ImageType>;
auto extractBaselineImage = ExtractImageFilterType::New();
extractBaselineImage->SetInput(reader->GetOutput());
extractBaselineImage->SetDirectionCollapseToSubmatrix();
extractBaselineImage->SetExtractionRegion(image->GetBufferedRegion());
extractBaselineImage->InPlaceOn();
if (!SameImage(extractTestImage->GetOutput(), extractBaselineImage->GetOutput()))
{
std::cerr << "input paste and output paste regions don't match!\n";
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
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