WikiExamples/Morphology/FlatStructuringElement.cxx

#include "itkImageFileReader.h"
#include "itkFlatStructuringElement.h"
#include "itkBinaryErodeImageFilter.h"

#include "QuickView.h"

int main(int argc, char *argv[])
{
  if(argc < 2)
    {
    std::cerr << argv[0] << " InputImageFile [radius]" << std::endl;
    return EXIT_FAILURE;
    }

  unsigned int radius = 2;
  if (argc > 2)
    {
    radius = atoi(argv[2]);
    }

  using ImageType = itk::Image<unsigned char, 2>;
  using ReaderType = itk::ImageFileReader<ImageType>;
  ReaderType::Pointer reader = ReaderType::New();
  reader->SetFileName(argv[1]);

  using StructuringElementType = itk::FlatStructuringElement<2>;
  StructuringElementType::RadiusType elementRadius;
  elementRadius.Fill(radius);

  StructuringElementType structuringElement = StructuringElementType::Box(elementRadius);

  using BinaryErodeImageFilterType = itk::BinaryErodeImageFilter <ImageType, ImageType, StructuringElementType>;

  BinaryErodeImageFilterType::Pointer erodeFilter
    = BinaryErodeImageFilterType::New();
  erodeFilter->SetInput(reader->GetOutput());
  erodeFilter->SetKernel(structuringElement);
  erodeFilter->SetErodeValue(255);

  QuickView viewer;
  viewer.AddImage(reader->GetOutput());
  viewer.AddImage(erodeFilter->GetOutput());
  viewer.Visualize();

  return EXIT_SUCCESS;
}