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| Crashes when initializing the iterator loop?
| | {{warning|1=The media wiki content on this page is no longer maintained.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. |
| | }} |
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| ==ShapedNeighborhoodIterator.cxx==
| | [https://itk.org/ITKExamples[ITK Sphinx Examples]] |
| <source lang="cpp">
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| #include "itkImage.h"
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| #include "itkShapedNeighborhoodIterator.h"
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| #include "itkImageRegionIterator.h"
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| | |
| #include <itkImageToVTKImageFilter.h>
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| #include "vtkImageViewer.h"
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| #include "vtkRenderWindowInteractor.h"
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| #include "vtkSmartPointer.h"
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| #include "vtkImageActor.h"
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| #include "vtkInteractorStyleImage.h"
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| #include "vtkRenderer.h"
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| | |
| typedef itk::Image<unsigned char, 2> ImageType;
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| | |
| void CreateImage(ImageType::Pointer image);
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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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| ImageType::SizeType radius;
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| radius[0] = 1;
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| radius[1] = 1;
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| | |
| typedef itk::ShapedNeighborhoodIterator<ImageType> IteratorType;
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| IteratorType iterator(radius, image, image->GetLargestPossibleRegion());
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| /*
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| // a smaller region
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| ImageType::RegionType region;
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| ImageType::IndexType start;
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| start[0] = 5;
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| start[1] = 5;
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| ImageType::SizeType size;
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| size[0] = 3;
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| size[1] = 4;
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| region.SetSize(size);
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| region.SetIndex(start);
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| IteratorType iterator(radius, image, region);
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| */
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|
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| IteratorType::OffsetType top = {{0,-1}};
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| IteratorType::OffsetType bottom = {{0,1}};
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| IteratorType::OffsetType left = {{-1,0}};
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| IteratorType::OffsetType right = {{1,0}};
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| iterator.ActivateOffset(top);
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| iterator.ActivateOffset(bottom);
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| iterator.ActivateOffset(left);
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| iterator.ActivateOffset(right);
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| | |
| for(iterator.GoToBegin(); !iterator.IsAtEnd(); ++iterator) // Crashes here!
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| {
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| std::cout << "top: " << iterator[top] << std::endl;
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| std::cout << "bottom: " << iterator[bottom] << std::endl;
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| std::cout << "left: " << iterator[left] << std::endl;
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| std::cout << "right: " << iterator[right] << std::endl;
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| }
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| | |
| // Visualize
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| typedef itk::ImageToVTKImageFilter<ImageType> ConnectorType;
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| ConnectorType::Pointer connector = ConnectorType::New();
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| connector->SetInput(image);
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| vtkSmartPointer<vtkImageActor> actor =
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| vtkSmartPointer<vtkImageActor>::New();
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| actor->SetInput(connector->GetOutput());
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| vtkSmartPointer<vtkRenderWindow> renderWindow =
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| vtkSmartPointer<vtkRenderWindow>::New();
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| vtkSmartPointer<vtkRenderWindowInteractor> interactor =
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| vtkSmartPointer<vtkRenderWindowInteractor>::New();
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| interactor->SetRenderWindow(renderWindow);
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| vtkSmartPointer<vtkRenderer> renderer =
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| vtkSmartPointer<vtkRenderer>::New();
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| renderWindow->AddRenderer(renderer);
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| renderer->AddActor(actor);
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| renderer->ResetCamera();
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| renderWindow->Render();
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| vtkSmartPointer<vtkInteractorStyleImage> style =
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| vtkSmartPointer<vtkInteractorStyleImage>::New();
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| interactor->SetInteractorStyle(style);
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| interactor->Start();
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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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| // Create an image with 2 connected components
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| ImageType::RegionType region;
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| ImageType::IndexType start;
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| start[0] = 0;
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| start[1] = 0;
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| ImageType::SizeType size;
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| unsigned int NumRows = 20;
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| unsigned int NumCols = 30;
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| size[0] = NumRows;
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| size[1] = NumCols;
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| region.SetSize(size);
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| region.SetIndex(start);
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| image->SetRegions(region);
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| image->Allocate();
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| itk::ImageRegionIterator<ImageType> imageIterator(image,region);
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| | |
| while(!imageIterator.IsAtEnd())
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| {
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| imageIterator.Set(0);
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| ++imageIterator;
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| }
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| /*
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| // Make a square
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| for(unsigned int r = 40; r < 100; r++)
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| {
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| for(unsigned int c = 40; c < 100; 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, 15);
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| }
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| }
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| */
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| }
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| </source>
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| | |
| ==CMakeLists.txt==
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| <source lang="cmake">
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| cmake_minimum_required(VERSION 2.6)
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| PROJECT(ShapedNeighborhoodIterator)
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| include_directories(/home/doriad/src/ITK/Wrapping/WrapITK/ExternalProjects/ItkVtkGlue/src/)
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|
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| FIND_PACKAGE(VTK REQUIRED)
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| INCLUDE(${VTK_USE_FILE})
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| FIND_PACKAGE(ITK REQUIRED)
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| INCLUDE(${ITK_USE_FILE})
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| ADD_EXECUTABLE(ShapedNeighborhoodIterator ShapedNeighborhoodIterator.cxx)
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| TARGET_LINK_LIBRARIES(ShapedNeighborhoodIterator vtkHybrid
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| ITKNumerics ITKBasicFilters ITKCommon ITKIO)
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| | |
| </source>
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