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| ==ScaleTransform.cxx== | | {{warning|1=The media wiki content on this page is no longer maintained.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"
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| #include "itkScaleTransform.h"
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| #include "itkImageFileReader.h"
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| #include "itkImageFileWriter.h"
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| #include "itkResampleImageFilter.h"
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|
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| typedef itk::Image<unsigned char, 2> ImageType;
| | [https://itk.org/ITKExamples[ITK Sphinx Examples]] |
| | |
| static void CreateImage(ImageType::Pointer image);
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| | |
| int main(int argc, char *argv[])
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| {
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| ImageType::Pointer image = ImageType::New();
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| CreateImage(image);
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|
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| std::cout << "input size: " << image->GetLargestPossibleRegion().GetSize() << std::endl;
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| | |
| std::cout << "Writing input... " << std::endl;
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| typedef itk::ImageFileWriter<ImageType> WriterType;
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| WriterType::Pointer inputWriter = WriterType::New();
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| inputWriter->SetFileName("input.png");
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| inputWriter->SetInput(image);
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| inputWriter->Update();
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| | |
| //typedef itk::ScaleTransform<float, 2> TransformType; // This does not work with 'float'
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| typedef itk::ScaleTransform<double, 2> TransformType;
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| TransformType::Pointer scaleTransform = TransformType::New();
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| itk::FixedArray<float, 2> scale;
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| scale[0] = 1.5; // newWidth/oldWidth
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| scale[1] = 1.5;
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| scaleTransform->SetScale(scale);
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| | |
| itk::Size<2> newSize;
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| newSize[0] = scale[0] * image->GetLargestPossibleRegion().GetSize()[0];
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| newSize[1] = scale[1] * image->GetLargestPossibleRegion().GetSize()[1];
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|
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| itk::Point<float,2> center;
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| center[0] = image->GetLargestPossibleRegion().GetSize()[0]/2;
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| center[1] = image->GetLargestPossibleRegion().GetSize()[1]/2;
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|
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| scaleTransform->SetCenter(center);
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|
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| std::cout << "Resampling... " << std::endl;
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| typedef itk::ResampleImageFilter<ImageType, ImageType> ResampleImageFilterType;
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| ResampleImageFilterType::Pointer resampleFilter = ResampleImageFilterType::New();
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| resampleFilter->SetTransform(scaleTransform);
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| resampleFilter->SetInput(image);
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| resampleFilter->SetSize(newSize);
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| resampleFilter->Update();
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| | |
| std::cout << "output size: " << resampleFilter->GetOutput()->GetLargestPossibleRegion().GetSize() << std::endl;
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|
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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(resampleFilter->GetOutput());
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| outputWriter->Update();
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| | |
| return EXIT_SUCCESS;
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| }
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| | |
| void CreateImage(ImageType::Pointer image)
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| {
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| itk::Index<2> start;
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| start.Fill(0);
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| itk::Size<2> size;
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| 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|ScaleTransform}}
| |
