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| ==ResampleImageFilter.cxx== | | {{warning|1=The media wiki content on this page is no longer maintained. The examples presented on the https://itk.org/Wiki/* pages likely require ITK version 4.13 or earlier releases. In many cases, the examples on this page no longer conform to the best practices for modern ITK versions. |
| <source lang="cpp">
| | }} |
| #include "itkImage.h"
| |
| #include "itkIdentityTransform.h"
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| #include "itkImageFileWriter.h"
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| #include "itkResampleImageFilter.h"
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|
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|
| | | [https://itk.org/ITKExamples[ITK Sphinx Examples]] |
| typedef itk::Image<unsigned char, 2> ImageType;
| |
| | |
| static void CreateImage(ImageType::Pointer image);
| |
| | |
| int main(int argc, char *argv[])
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| {
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| // Create input image
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| ImageType::Pointer input = ImageType::New();
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| CreateImage(input);
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| ImageType::SizeType inputSize = input->GetLargestPossibleRegion().GetSize();
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| | |
| std::cout << "Input size: " << inputSize << std::endl;
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| | |
| typedef itk::ImageFileWriter<ImageType> WriterType;
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| WriterType::Pointer writer = WriterType::New();
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| writer->SetFileName("input.png");
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| writer->SetInput(input);
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| writer->Update();
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| | |
| // Resize
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| ImageType::SizeType outputSize;
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| outputSize.Fill(200);
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| ImageType::SpacingType outputSpacing;
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| outputSpacing[0] = input->GetSpacing()[0] * (static_cast<double>(inputSize[0]) / static_cast<double>(outputSize[0]));
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| outputSpacing[1] = input->GetSpacing()[1] * (static_cast<double>(inputSize[1]) / static_cast<double>(outputSize[1]));
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|
| |
| typedef itk::IdentityTransform<double, 2> TransformType;
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| typedef itk::ResampleImageFilter<ImageType, ImageType> ResampleImageFilterType;
| |
| ResampleImageFilterType::Pointer resample = ResampleImageFilterType::New();
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| resample->SetInput(input);
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| resample->SetSize(outputSize);
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| resample->SetOutputSpacing(outputSpacing);
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| resample->SetTransform(TransformType::New());
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| resample->UpdateLargestPossibleRegion();
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|
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| ImageType::Pointer output = resample->GetOutput();
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|
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| std::cout << "Output size: " << output->GetLargestPossibleRegion().GetSize() << std::endl;
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| | |
| std::cout << "Writing output... " << std::endl;
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| WriterType::Pointer outputWriter = WriterType::New();
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| outputWriter->SetFileName("output.png");
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| outputWriter->SetInput(output);
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| outputWriter->Update();
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| | |
| return EXIT_SUCCESS;
| |
| }
| |
| | |
| void CreateImage(ImageType::Pointer image)
| |
| {
| |
| // Allocate empty image
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| itk::Index<2> start; start.Fill(0);
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| itk::Size<2> size; size.Fill(100);
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| ImageType::RegionType region(start, size);
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| image->SetRegions(region);
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| image->Allocate();
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| image->FillBuffer(0);
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| | |
| // Make a white square
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| for(unsigned int r = 40; r < 60; r++)
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| {
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| for(unsigned int c = 40; c < 60; c++)
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| {
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| ImageType::IndexType pixelIndex;
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| pixelIndex[0] = r;
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| pixelIndex[1] = c;
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| image->SetPixel(pixelIndex, 255);
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| }
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| }
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| }
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| | |
| </source>
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| | |
| {{ITKCMakeLists|{{SUBPAGENAME}}}}
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