SphinxExamples/src/Core/Common/IterateRegionWithoutWriteAccess/Code.cxx

/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#include "itkImage.h"
#include "itkImageFileReader.h"
#include "itkImageRegionConstIterator.h"
 
int
main(int argc, char * argv[])
{
  if (argc < 2)
  {
    std::cerr << "Required: filename" << std::endl;
    return EXIT_FAILURE;
  }
 
  using ImageType = itk::Image<unsigned char, 2>;
 
  using ReaderType = itk::ImageFileReader<ImageType>;
  ReaderType::Pointer reader = ReaderType::New();
  reader->SetFileName(argv[1]);
  reader->Update();
 
  ImageType::Pointer image = reader->GetOutput();
 
  ImageType::SizeType regionSize;
  regionSize[0] = 5;
  regionSize[1] = 4;
 
  ImageType::IndexType regionIndex;
  regionIndex[0] = 0;
  regionIndex[1] = 0;
 
  ImageType::RegionType region;
  region.SetSize(regionSize);
  region.SetIndex(regionIndex);
 
  itk::ImageRegionConstIterator<ImageType> imageIterator(image, region);
  // itk::ImageRegionConstIterator<ImageType> imageIterator(image,image->GetLargestPossibleRegion());
 
  while (!imageIterator.IsAtEnd())
  {
    // Get the value of the current pixel
    unsigned char val = imageIterator.Get();
    std::cout << (int)val << std::endl;
 
    ++imageIterator;
  }
 
  return EXIT_SUCCESS;
}