ITK/Examples/Segmentation/OtsuThresholdImageFilter

#include "itkImage.h"
#include "itkImageFileWriter.h"
#include "itkOtsuThresholdImageFilter.h"
#include "itkImageRegionIterator.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::OtsuThresholdImageFilter <ImageType, ImageType>
          OtsuThresholdImageFilterType;
  OtsuThresholdImageFilterType::Pointer otsuFilter
          = OtsuThresholdImageFilterType::New();
  otsuFilter->SetInput(image);
  otsuFilter->Update();
 
  return EXIT_SUCCESS;
}
 
void CreateImage(ImageType::Pointer image)
{
  // Create an image
  ImageType::IndexType start;
  start.Fill(0);
 
  ImageType::SizeType size;
  size.Fill(100);
 
  ImageType::RegionType region;
  region.SetSize(size);
  region.SetIndex(start);
 
  image->SetRegions(region);
  image->Allocate();
 
  // Make the whole image white
  itk::ImageRegionIterator<ImageType> iterator(image,image->GetLargestPossibleRegion());
 
  /*
   //Create a square
  while(!iterator.IsAtEnd())
    {
    iterator.Set(255);
    ++iterator;
    }
  */
}