ITK/Examples/Iterators/ShapedNeighborhoodIteratorManual: Difference between revisions

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#include "itkShapedNeighborhoodIterator.h"
#include "itkShapedNeighborhoodIterator.h"
#include "itkImageRegionIterator.h"
#include "itkImageRegionIterator.h"
#include "itkNeighborhoodAlgorithm.h"


typedef itk::Image<unsigned char, 2>  ImageType;
typedef itk::Image<unsigned char, 2>  ImageType;
Line 19: Line 20:


   typedef itk::ShapedNeighborhoodIterator<ImageType> IteratorType;
   typedef itk::ShapedNeighborhoodIterator<ImageType> IteratorType;
 
  // a smaller region
  ImageType::RegionType region;
  ImageType::IndexType start;
  start[0] = 5;
  start[1] = 5;
  ImageType::SizeType size;
  size[0] = 3;
  size[1] = 4;
  region.SetSize(size);
  region.SetIndex(start);
  IteratorType iterator(radius, image, region);


   IteratorType::OffsetType top = {{0,-1}};
   IteratorType::OffsetType top = {{0,-1}};
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   IteratorType::OffsetType right = {{1,0}};
   IteratorType::OffsetType right = {{1,0}};
   IteratorType::OffsetType center = {{0,0}};
   IteratorType::OffsetType center = {{0,0}};
  iterator.ActivateOffset(top);
  iterator.ActivateOffset(bottom);
  iterator.ActivateOffset(left);
  iterator.ActivateOffset(right);
  iterator.ActivateOffset(center);


   iterator.GoToBegin();
    
   iterator.IsAtEnd();
 
   typedef itk::NeighborhoodAlgorithm
    ::ImageBoundaryFacesCalculator< ImageType > FaceCalculatorType;


   for(iterator.GoToBegin(); !iterator.IsAtEnd(); ++iterator) // Crashes here!
  FaceCalculatorType faceCalculator;
  FaceCalculatorType::FaceListType faceList;
  faceList = faceCalculator(image, image->GetLargestPossibleRegion(),
                            radius);
  FaceCalculatorType::FaceListType::iterator faceListIterator;
 
   for ( faceListIterator=faceList.begin(); faceListIterator != faceList.end(); ++faceListIterator)
     {
     {
     std::cout << "top: " << iterator[top] << std::endl;
     IteratorType iterator(radius, image, *faceListIterator);
    std::cout << "bottom: " << iterator[bottom] << std::endl;
    iterator.ActivateOffset(top);
    std::cout << "left: " << iterator[left] << std::endl;
    iterator.ActivateOffset(bottom);
    std::cout << "right: " << iterator[right] << std::endl;
    iterator.ActivateOffset(left);
    iterator.ActivateOffset(right);
    iterator.ActivateOffset(center);
 
    for(iterator.GoToBegin(); !iterator.IsAtEnd(); ++iterator) // Crashes here!
      {
      std::cout << "top: " << iterator[top] << std::endl;
      std::cout << "bottom: " << iterator[bottom] << std::endl;
      std::cout << "left: " << iterator[left] << std::endl;
      std::cout << "right: " << iterator[right] << std::endl;
      }
     }
     }


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     ++imageIterator;
     ++imageIterator;
     }
     }
 
 
}
}
</source>
</source>

Revision as of 15:19, 14 November 2010

Crashes when initializing the iterator loop?

ShapedNeighborhoodIterator.cxx

<source lang="cpp">

  1. include "itkImage.h"
  2. include "itkShapedNeighborhoodIterator.h"
  3. include "itkImageRegionIterator.h"
  4. include "itkNeighborhoodAlgorithm.h"

typedef itk::Image<unsigned char, 2> ImageType;

void CreateImage(ImageType::Pointer image);

int main(int, char*[]) {

 ImageType::Pointer image = ImageType::New();
 ImageType::SizeType radius;
 radius[0] = 1;
 radius[1] = 1;
 typedef itk::ShapedNeighborhoodIterator<ImageType> IteratorType;
 IteratorType::OffsetType top = Template:0,-1;
 IteratorType::OffsetType bottom = Template:0,1;
 IteratorType::OffsetType left = Template:-1,0;
 IteratorType::OffsetType right = Template:1,0;
 IteratorType::OffsetType center = Template:0,0;


 typedef itk::NeighborhoodAlgorithm
   ::ImageBoundaryFacesCalculator< ImageType > FaceCalculatorType;
 FaceCalculatorType faceCalculator;
 FaceCalculatorType::FaceListType faceList;
 faceList = faceCalculator(image, image->GetLargestPossibleRegion(),
                           radius);
 FaceCalculatorType::FaceListType::iterator faceListIterator;
 for ( faceListIterator=faceList.begin(); faceListIterator != faceList.end(); ++faceListIterator)
   {
   IteratorType iterator(radius, image, *faceListIterator);
   iterator.ActivateOffset(top);
   iterator.ActivateOffset(bottom);
   iterator.ActivateOffset(left);
   iterator.ActivateOffset(right);
   iterator.ActivateOffset(center);
   for(iterator.GoToBegin(); !iterator.IsAtEnd(); ++iterator) // Crashes here!
     {
     std::cout << "top: " << iterator[top] << std::endl;
     std::cout << "bottom: " << iterator[bottom] << std::endl;
     std::cout << "left: " << iterator[left] << std::endl;
     std::cout << "right: " << iterator[right] << std::endl;
     }
   }
 return EXIT_SUCCESS;

}

void CreateImage(ImageType::Pointer image) {

 // Create an image with 2 connected components
 ImageType::RegionType region;
 ImageType::IndexType start;
 start[0] = 0;
 start[1] = 0;
 ImageType::SizeType size;
 size[0] = 100;
 size[1] = 200;
 region.SetSize(size);
 region.SetIndex(start);
 image->SetRegions(region);
 image->Allocate();
 itk::ImageRegionIterator<ImageType> imageIterator(image,region);
 while(!imageIterator.IsAtEnd())
   {
   imageIterator.Set(0);
   ++imageIterator;
   }

} </source>

CMakeLists.txt

<source lang="cmake"> cmake_minimum_required(VERSION 2.6)

PROJECT(ShapedNeighborhoodIterator)

include_directories(/home/doriad/src/ITK/Wrapping/WrapITK/ExternalProjects/ItkVtkGlue/src/)

FIND_PACKAGE(VTK REQUIRED) INCLUDE(${VTK_USE_FILE})

FIND_PACKAGE(ITK REQUIRED) INCLUDE(${ITK_USE_FILE})

ADD_EXECUTABLE(ShapedNeighborhoodIterator ShapedNeighborhoodIterator.cxx) TARGET_LINK_LIBRARIES(ShapedNeighborhoodIterator vtkHybrid ITKNumerics ITKBasicFilters ITKCommon ITKIO)

</source>