SphinxExamples/src/IO/ImageBase/GenerateSlicesFromVolume/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 "itkRescaleIntensityImageFilter.h"
#include "itkNumericSeriesFileNames.h"
#include "itkImageSeriesWriter.h"
 
int
main(int argc, char * argv[])
{
  if (argc != 3)
  {
    std::cerr << "Usage: " << std::endl;
    std::cerr << argv[0];
    std::cerr << " <InputFileName> <OutputFileName>";
    std::cerr << std::endl;
    return EXIT_FAILURE;
  }
 
  const char * inputFileName = argv[1];
  const char * outputFileName = argv[2];
 
  std::string format = std::string(outputFileName) + std::string("-%d.png");
 
  constexpr unsigned int Dimension = 3;
 
  using PixelType = unsigned char;
  using InputImageType = itk::Image<PixelType, Dimension>;
 
  using ReaderType = itk::ImageFileReader<InputImageType>;
  ReaderType::Pointer reader = ReaderType::New();
  reader->SetFileName(inputFileName);
 
  using OutputPixelType = unsigned char;
  using RescaleImageType = itk::Image<OutputPixelType, Dimension>;
 
  using RescaleFilterType = itk::RescaleIntensityImageFilter<InputImageType, RescaleImageType>;
  RescaleFilterType::Pointer rescale = RescaleFilterType::New();
  rescale->SetInput(reader->GetOutput());
  rescale->SetOutputMinimum(0);
  rescale->SetOutputMaximum(255);
  rescale->UpdateLargestPossibleRegion();
 
  InputImageType::RegionType region = reader->GetOutput()->GetLargestPossibleRegion();
  InputImageType::SizeType   size = region.GetSize();
 
  itk::NumericSeriesFileNames::Pointer fnames = itk::NumericSeriesFileNames::New();
  fnames->SetStartIndex(0);
  fnames->SetEndIndex(size[2] - 1);
  fnames->SetIncrementIndex(1);
  fnames->SetSeriesFormat(format.c_str());
 
  using OutputImageType = itk::Image<OutputPixelType, 2>;
 
  using WriterType = itk::ImageSeriesWriter<RescaleImageType, OutputImageType>;
  WriterType::Pointer writer = WriterType::New();
  writer->SetInput(rescale->GetOutput());
  writer->SetFileNames(fnames->GetFileNames());
 
  try
  {
    writer->Update();
  }
  catch (itk::ExceptionObject & error)
  {
    std::cerr << "Error: " << error << std::endl;
    return EXIT_FAILURE;
  }
 
  return EXIT_SUCCESS;
}