SphinxExamples/src/Filtering/ImageIntensity/TransformVectorValuedImagePixels/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 "itkVectorRescaleIntensityImageFilter.h"
#include "itkCastImageFilter.h"
 
int
main(int argc, char * argv[])
{
  if (argc < 3)
  {
    std::cerr << "Required: input output" << std::endl;
    return EXIT_FAILURE;
  }
 
  std::string inputFilename = argv[1];
  std::string outputFilename = argv[2];
 
  using FloatImageType = itk::Image<itk::CovariantVector<float, 3>, 2>;
  using UnsignedCharImageType = itk::Image<itk::CovariantVector<unsigned char, 3>, 2>;
 
  using ReaderType = itk::ImageFileReader<FloatImageType>;
  ReaderType::Pointer reader = ReaderType::New();
  reader->SetFileName(inputFilename);
  reader->Update();
 
  using VectorRescaleFilterType = itk::VectorRescaleIntensityImageFilter<FloatImageType, UnsignedCharImageType>;
  VectorRescaleFilterType::Pointer rescaleFilter = VectorRescaleFilterType::New();
  rescaleFilter->SetInput(reader->GetOutput());
  rescaleFilter->SetOutputMaximumMagnitude(255);
  rescaleFilter->Update();
 
  using WriterType = itk::ImageFileWriter<UnsignedCharImageType>;
  WriterType::Pointer writer = WriterType::New();
  writer->SetFileName(outputFilename);
  writer->SetInput(rescaleFilter->GetOutput());
  writer->Update();
 
  return EXIT_SUCCESS;
}