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| ==ShapedNeighborhoodIterator_Manual.cxx== | | {{warning|1=The media wiki content on this page is no longer maintained.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 "itkShapedNeighborhoodIterator.h"
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| #include "itkImageRegionIterator.h"
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| #include "itkNeighborhoodAlgorithm.h"
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| | |
| // Notice that char type pixel values will not appear
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| // properly on the command prompt therefore for the
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| // demonstration purposes it is best to use the int | |
| // type, however in real applications iterators have | |
| // no problems with char type images.
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| //typedef itk::Image<unsigned char, 2> ImageType;
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| typedef itk::Image<unsigned int, 2> ImageType;
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|
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| void CreateImage(ImageType::Pointer image);
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|
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| int main(int, char*[])
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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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| typedef itk::ShapedNeighborhoodIterator<ImageType> IteratorType;
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|
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| itk::Size<2> radius;
| | [https://itk.org/ITKExamples[ITK Sphinx Examples]] |
| radius.Fill(1);
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| IteratorType iterator(radius, image, image->GetLargestPossibleRegion());
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| std::cout << "By default there are " << iterator.GetActiveIndexListSize() << " active indices." << std::endl;
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|
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| IteratorType::OffsetType top = {{0,-1}};
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| iterator.ActivateOffset(top);
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| IteratorType::OffsetType bottom = {{0,1}};
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| iterator.ActivateOffset(bottom);
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|
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| std::cout << "Now there are " << iterator.GetActiveIndexListSize() << " active indices." << std::endl;
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|
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| IteratorType::IndexListType indexList = iterator.GetActiveIndexList();
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| IteratorType::IndexListType::const_iterator listIterator = indexList.begin();
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| while (listIterator != indexList.end())
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| {
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| std::cout << *listIterator << " ";
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| ++listIterator;
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| }
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| std::cout << std::endl;
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|
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| // Note that ZeroFluxNeumannBoundaryCondition is used by default so even
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| // pixels outside of the image will have valid values (equivalent to their neighbors just inside the image)
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| for(iterator.GoToBegin(); !iterator.IsAtEnd(); ++iterator)
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| {
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| std::cout << "New position: " << std::endl;
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| IteratorType::ConstIterator ci = iterator.Begin();
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| | |
| while (! ci.IsAtEnd())
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| {
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| std::cout << "Centered at " << iterator.GetIndex() << std::endl;
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| std::cout << "Neighborhood index " << ci.GetNeighborhoodIndex()
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| << " is offset " << ci.GetNeighborhoodOffset()
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| << " and has value " << ci.Get()
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| << " The real index is " << iterator.GetIndex() + ci.GetNeighborhoodOffset() << std::endl;
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| ci++;
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| }
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| }
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|
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| std::cout << std::endl;
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|
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| return EXIT_SUCCESS;
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| }
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|
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| void CreateImage(ImageType::Pointer image)
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| {
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| ImageType::IndexType start;
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| start.Fill(0);
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|
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| ImageType::SizeType size;
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| size.Fill(10);
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|
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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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|
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| }
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| | |
| </source>
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| | |
| {{ITKCMakeLists|ShapedNeighborhoodIterator_Manual}}
| |
