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| ==ExtractImageFilter.cxx== | | {{warning|1=The media wiki content on this page is no longer maintained.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">
| | }} |
| // This is different from CropImageFilter only in the way | |
| // that the region to crop is specified. | |
| #include "itkImage.h"
| |
| #include <itkImageFileReader.h>
| |
| #include <itkExtractImageFilter.h>
| |
| | |
| int main(int argc, char *argv[])
| |
| {
| |
| typedef itk::Image<unsigned char, 2> ImageType;
| |
| | |
| ImageType::IndexType start;
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| start.Fill(0);
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| | |
| ImageType::SizeType size;
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| size.Fill(10);
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| | |
| ImageType::RegionType region(start, size); | |
|
| |
| ImageType::Pointer image = ImageType::New();
| |
| image->SetRegions(region);
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| image->Allocate();
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| image->FillBuffer(5);
| |
| | |
| std::cout << "Image largest region: " << image->GetLargestPossibleRegion() << std::endl;
| |
| | |
| ImageType::IndexType desiredStart;
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| desiredStart.Fill(3);
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| | |
| ImageType::SizeType desiredSize;
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| desiredSize.Fill(4);
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| | |
| ImageType::RegionType desiredRegion(desiredStart, desiredSize);
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| | |
| std::cout << "desiredRegion: " << desiredRegion << std::endl;
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|
| |
| typedef itk::ExtractImageFilter< ImageType, ImageType > FilterType;
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| FilterType::Pointer filter = FilterType::New();
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| filter->SetExtractionRegion(desiredRegion);
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| filter->SetInput(image);
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| filter->SetDirectionCollapseToIdentity(); // This is required.
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| filter->Update();
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|
| |
| ImageType::Pointer output = filter->GetOutput();
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| output->DisconnectPipeline();
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| output->FillBuffer(2);
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| | |
| itk::Index<2> index;
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| index.Fill(5);
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| | |
| std::cout << "new largest region: " << output->GetLargestPossibleRegion() << std::endl;
| |
| std::cout << "new: " << (int)output->GetPixel(index) << std::endl;
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| std::cout << "Original: " << (int)image->GetPixel(index) << std::endl;
| |
| | |
| return EXIT_SUCCESS;
| |
| }
| |
| | |
| </source>
| |
| | |
| {{ITKCMakeLists|ExtractImageFilter|}}
| |
