SphinxExamples/src/Filtering/Colormap/ApplyAColorMapToAnImage/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 "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkRescaleIntensityImageFilter.h"
#include "itkRGBPixel.h"
#include "itkScalarToRGBColormapImageFilter.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;
    }
 
  constexpr unsigned int Dimension = 2;
 
  using PixelType = unsigned char;
  using ImageType = itk::Image< PixelType, Dimension >;
 
  using ReaderType = itk::ImageFileReader< ImageType >;
  ReaderType::Pointer reader = ReaderType::New();
  reader->SetFileName( argv[1] );
 
  using RGBPixelType = itk::RGBPixel< unsigned char >;
  using RGBImageType = itk::Image< RGBPixelType, Dimension >;
 
  using RGBFilterType = itk::ScalarToRGBColormapImageFilter< ImageType, RGBImageType>;
  RGBFilterType::Pointer rgbfilter = RGBFilterType::New();
  rgbfilter->SetInput( reader->GetOutput() );
  rgbfilter->SetColormap( RGBFilterType::Hot );
 
  using WriterType = itk::ImageFileWriter< RGBImageType >;
  WriterType::Pointer writer = WriterType::New();
  writer->SetFileName( argv[2] );
  writer->SetInput( rgbfilter->GetOutput() );
 
  try
    {
    writer->Update();
    }
  catch( itk::ExceptionObject & error )
    {
    std::cerr << "Error: " << error << std::endl;
    return EXIT_FAILURE;
    }
 
  return EXIT_SUCCESS;
}