ITK/Examples/ImageProcessing/BinaryImageToShapeLabelMapFilter: Difference between revisions

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==BinaryImageToShapeLabelMapFilter.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{{warning|1=The media wiki content on this page is no longer maintained.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 releasesIn many cases, the examples on this page no longer conform to the best practices for modern ITK versions.
<source lang="cpp">
}}
#include "itkImage.h"
#include "itkImageFileWriter.h"
#include "itkImageRegionIterator.h"
#include "itkBinaryImageToShapeLabelMapFilter.h"
 
typedef itk::Image<unsigned char, 2>  ImageType;
void CreateImage(ImageType::Pointer image);
 
int main(int, char *[])
{
  ImageType::Pointer image = ImageType::New();
  CreateImage(image);
 
  typedef itk::BinaryImageToShapeLabelMapFilter<ImageType> BinaryImageToShapeLabelMapFilterType;
  BinaryImageToShapeLabelMapFilterType::Pointer binaryImageToShapeLabelMapFilter = BinaryImageToShapeLabelMapFilterType::New();
  binaryImageToShapeLabelMapFilter->SetInput(image);
  binaryImageToShapeLabelMapFilter->Update();
 
  // The output of this filter is an itk::ShapeLabelMap, which contains itk::ShapeLabelObject's
  std::cout << "There are " << binaryImageToShapeLabelMapFilter->GetOutput()->GetNumberOfLabelObjects() << " objects." << std::endl;
 
  // Loop over all of the blobs
  for(unsigned int i = 0; i < binaryImageToShapeLabelMapFilter->GetOutput()->GetNumberOfLabelObjects(); i++)
    {
    BinaryImageToShapeLabelMapFilterType::OutputImageType::LabelObjectType* labelObject = binaryImageToShapeLabelMapFilter->GetOutput()->GetNthLabelObject(i);
    // Output the bounding box (an example of one possible property) of the ith region
    std::cout << "Object " << i << " has bounding box " << labelObject->GetBoundingBox() << std::endl;
    }
 
  return EXIT_SUCCESS;
}
 
void CreateImage(ImageType::Pointer image)
{
  // Create a black image with a white square
  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;
    }
 
  typedef  itk::ImageFileWriter< ImageType  > WriterType;
  WriterType::Pointer writer = WriterType::New();
  writer->SetFileName("image.png");
  writer->SetInput(image);
  writer->Update();
}
 
</source>
 
{{ITKCMakeLists|BinaryImageToShapeLabelMapFilter}}

Latest revision as of 20:28, 4 June 2019

Warning: 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.