SphinxExamples/src/Filtering/ImageGrid/PadImageByWrapping/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
 *
 *         https://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 "itkRescaleIntensityImageFilter.h"
#include "itkWrapPadImageFilter.h"
#include "itkImageRegionIterator.h"
 
using ImageType = itk::Image<unsigned char, 2>;
 
static void
CreateImage(ImageType::Pointer image);
 
int
main()
{
  auto image = ImageType::New();
  CreateImage(image);
 
  using WrapPadImageFilterType = itk::WrapPadImageFilter<ImageType, ImageType>;
 
  ImageType::SizeType lowerBound;
  lowerBound[0] = 20;
  lowerBound[1] = 30;
 
  ImageType::SizeType upperBound;
  upperBound[0] = 50;
  upperBound[1] = 40;
 
  auto padFilter = WrapPadImageFilterType::New();
  padFilter->SetInput(image);
  padFilter->SetPadLowerBound(lowerBound);
  padFilter->SetPadUpperBound(upperBound);
  padFilter->Update();
 
  return EXIT_SUCCESS;
}
 
void
CreateImage(ImageType::Pointer image)
{
  // Create an image
  ImageType::RegionType region;
  ImageType::IndexType  start;
  start[0] = 0;
  start[1] = 0;
 
  ImageType::SizeType size;
  size[0] = 200;
  size[1] = 100;
 
  region.SetSize(size);
  region.SetIndex(start);
 
  image->SetRegions(region);
  image->Allocate();
  itk::ImageRegionIterator<ImageType> imageIterator(image, image->GetLargestPossibleRegion());
 
  while (!imageIterator.IsAtEnd())
  {
    imageIterator.Set(imageIterator.GetIndex()[0]);
    ++imageIterator;
  }
}