SphinxExamples/src/Filtering/ImageGrid/Create3DVolume/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 "itkImageFileWriter.h"
#include "itkTileImageFilter.h"
 
int
main(int argc, char * argv[])
{
  if (argc < 3)
  {
    std::cerr << "Usage: " << std::endl;
    std::cerr << argv[0];
    std::cerr << "<input1> <input2> <input3> ... <output>";
    std::cerr << std::endl;
    return EXIT_FAILURE;
  }
 
  constexpr unsigned int InputDimension = 2;
  constexpr unsigned int OutputDimension = 3;
 
  using PixelType = unsigned char;
  using InputImageType = itk::Image<PixelType, InputDimension>;
  using OutputImageType = itk::Image<PixelType, OutputDimension>;
 
  using ReaderType = itk::ImageFileReader<InputImageType>;
  ReaderType::Pointer reader = ReaderType::New();
 
  using FilterType = itk::TileImageFilter<InputImageType, OutputImageType>;
  FilterType::Pointer filter = FilterType::New();
 
  itk::FixedArray<unsigned int, OutputDimension> layout;
  layout[0] = 2;
  layout[1] = 2;
  layout[2] = 0;
 
  filter->SetLayout(layout);
 
  for (int ii = 1; ii < argc - 1; ++ii)
  {
    reader->SetFileName(argv[ii]);
 
    try
    {
      reader->Update();
    }
    catch (itk::ExceptionObject & e)
    {
      std::cerr << e << std::endl;
      return EXIT_FAILURE;
    }
 
    InputImageType::Pointer input = reader->GetOutput();
    input->DisconnectPipeline();
 
    filter->SetInput(ii - 1, input);
  }
 
  constexpr PixelType defaultValue = 128;
 
  filter->SetDefaultPixelValue(defaultValue);
 
  using WriterType = itk::ImageFileWriter<OutputImageType>;
  WriterType::Pointer writer = WriterType::New();
  writer->SetFileName(argv[argc - 1]);
  writer->SetInput(filter->GetOutput());
 
  try
  {
    writer->Update();
  }
  catch (itk::ExceptionObject & error)
  {
    std::cerr << "Error: " << error << std::endl;
    return EXIT_FAILURE;
  }
 
  return EXIT_SUCCESS;
}