|
|
| Line 1: |
Line 1: |
| ==ExtractImageFilter.cxx== | | {{warning|1=The media wiki content on this page is no longer maintained.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, char *[])
| |
| {
| |
| typedef itk::Image<unsigned char, 2> ImageType;
| |
| | |
| ImageType::IndexType start;
| |
| start.Fill(0);
| |
| | |
| ImageType::SizeType size;
| |
| size.Fill(10);
| |
| | |
| ImageType::RegionType region(start, size); | |
|
| |
| ImageType::Pointer image = ImageType::New();
| |
| image->SetRegions(region);
| |
| image->Allocate();
| |
| image->FillBuffer(5);
| |
| | |
| std::cout << "Image largest region: " << image->GetLargestPossibleRegion() << std::endl;
| |
| | |
| ImageType::IndexType desiredStart;
| |
| desiredStart.Fill(3);
| |
| | |
| ImageType::SizeType desiredSize;
| |
| desiredSize.Fill(4);
| |
| | |
| ImageType::RegionType desiredRegion(desiredStart, desiredSize);
| |
| | |
| std::cout << "desiredRegion: " << desiredRegion << std::endl;
| |
|
| |
| typedef itk::ExtractImageFilter< ImageType, ImageType > FilterType;
| |
| FilterType::Pointer filter = FilterType::New();
| |
| filter->SetExtractionRegion(desiredRegion);
| |
| filter->SetInput(image);
| |
| #if ITK_VERSION_MAJOR >= 4
| |
| filter->SetDirectionCollapseToIdentity(); // This is required.
| |
| #endif
| |
| filter->Update();
| |
|
| |
| ImageType::Pointer output = filter->GetOutput();
| |
| output->DisconnectPipeline();
| |
| output->FillBuffer(2);
| |
| | |
| itk::Index<2> index;
| |
| index.Fill(5);
| |
| | |
| std::cout << "new largest region: " << output->GetLargestPossibleRegion() << std::endl;
| |
| std::cout << "new: " << (int)output->GetPixel(index) << std::endl;
| |
| std::cout << "Original: " << (int)image->GetPixel(index) << std::endl;
| |
| | |
| return EXIT_SUCCESS;
| |
| }
| |
| </source>
| |
| | |
| {{ITKCMakeLists|{{SUBPAGENAME}}}}
| |
