ITK/Examples/ImageProcessing/BinaryImageToShapeLabelMapFilter

BinaryImageToShapeLabelMapFilter.cxx

<source lang="cpp">

1. include "itkImage.h"
2. include "itkImageFileWriter.h"
3. include "itkImageRegionIterator.h"
4. include "itkBinaryImageToShapeLabelMapFilter.h"

typedef itk::Image<unsigned char, 2> ImageType; static void CreateImage(ImageType::Pointer image);

int main(int, char *[]) {

 ImageType::Pointer image = ImageType::New();
 CreateImage(image);

 typedef itk::BinaryImageToShapeLabelMapFilter<ImageType> LabelMapFilterType;
 LabelMapFilterType::Pointer labelMapFilter = LabelMapFilterType::New();
 labelMapFilter->SetInput(image);
 labelMapFilter->Update();
 LabelMapFilterType::OutputImageType * labelMap = labelMapFilter->GetOutput();
  
 std::cout << "There are " << labelMap->GetNumberOfLabelObjects() << " objects." << std::endl;
 for(unsigned int i = 0; i < labelMap->GetNumberOfLabelObjects(); i++)
   {
   std::cout << "Object " << i << " has bounding box " << labelMap->GetNthLabelObject(i)->GetBoundingBox() << std::endl;
   }

 return EXIT_SUCCESS;

}

void CreateImage(ImageType::Pointer image) {

 ImageType::IndexType start;
 start.Fill(0);

 ImageType::SizeType size;
 size.Fill(20);

 ImageType::RegionType region;
 region.SetSize(size);
 region.SetIndex(start);
 image->SetRegions(region);
 image->Allocate();

 itk::ImageRegionIterator<ImageType> imageIterator(image,image->GetLargestPossibleRegion());

 // Make a square
 while(!imageIterator.IsAtEnd())
 {
   if((imageIterator.GetIndex()[0] > 5 && imageIterator.GetIndex()[0] < 10) &&
     (imageIterator.GetIndex()[1] > 5 && imageIterator.GetIndex()[1] < 10) )
       {
       imageIterator.Set(255);
       }
     else
       {
       imageIterator.Set(0);
       }

   ++imageIterator;
 }

} </source>

CMakeLists.txt

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

PROJECT(BinaryImageToShapeLabelMapFilter)

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

ADD_EXECUTABLE(BinaryImageToShapeLabelMapFilter BinaryImageToShapeLabelMapFilter.cxx) TARGET_LINK_LIBRARIES(BinaryImageToShapeLabelMapFilter ITKIO ITKBasicFilters ITKCommon ITKReview ) </source>