SphinxExamples/src/Filtering/ImageCompare/CombineTwoImagesWithCheckerBoardPattern/Code.cxx

/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  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 "itkCheckerBoardImageFilter.h"
#include "itkImageFileWriter.h"

int main(int argc, char *argv[])
{
  if( argc != 2 )
    {
    std::cerr << "Usage:" << std::endl;
    std::cerr << argv[0] << " <OutputImage>" << std::endl;
    return EXIT_FAILURE;
    }

  const unsigned int Dimension = 2;

  typedef unsigned char                       PixelType;
  typedef itk::Image< PixelType, Dimension >  ImageType;

  ImageType::IndexType start;
  start.Fill(0);

  ImageType::SizeType size;
  size.Fill(100);

  ImageType::RegionType region;
  region.SetSize(size);
  region.SetIndex(start);

  ImageType::Pointer image1 = ImageType::New();
  image1->SetRegions(region);
  image1->Allocate();
  image1->FillBuffer( 0 );

  ImageType::Pointer image2 = ImageType::New();
  image2->SetRegions(region);
  image2->Allocate();
  image2->FillBuffer( 255 );

  typedef itk::CheckerBoardImageFilter< ImageType > CheckerBoardFilterType;
  CheckerBoardFilterType::Pointer checkerBoardFilter =
    CheckerBoardFilterType::New();
  checkerBoardFilter->SetInput1(image1);
  checkerBoardFilter->SetInput2(image2);

  typedef itk::ImageFileWriter< ImageType > WriterType;
  WriterType::Pointer writer = WriterType::New();
  writer->SetInput( checkerBoardFilter->GetOutput() );
  writer->SetFileName( argv[1] );

  try
    {
    writer->Update();
    }
  catch( itk::ExceptionObject & error )
    {
    std::cerr << "Error: " << error << std::endl;
    return EXIT_FAILURE;
    }

  return EXIT_SUCCESS;
}