Examples/Filtering/LaplacianSharpeningImageFilter.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 "itkLaplacianSharpeningImageFilter.h"
#include "itkImageFileReader.h"
#include "itkImageFileWriter.h"
#include "itkRescaleIntensityImageFilter.h"

int main(int argc, char* argv[])
{
  if( argc < 3)
    {
    std::cerr << "Usage: " << std::endl;
    std::cerr << argv[0] << " inputImage outputImage " << std::endl;
    return EXIT_FAILURE;
    }

  const char * inputFilename  = argv[1];
  const char * outputFilename = argv[2];

  using CharPixelType = unsigned char;
  constexpr unsigned int Dimension = 2;

  using CharImageType = itk::Image<CharPixelType, Dimension>;

  using ReaderType = itk::ImageFileReader< CharImageType >;
  using WriterType = itk::ImageFileWriter< CharImageType >;

  using RescaleFilter = itk::RescaleIntensityImageFilter<CharImageType, CharImageType>;

  using LaplacianSharpeningFilter = itk::LaplacianSharpeningImageFilter<
                              CharImageType,
                              CharImageType >;


  //Setting the IO
  ReaderType::Pointer reader = ReaderType::New();
  WriterType::Pointer writer = WriterType::New();
  RescaleFilter::Pointer rescale = RescaleFilter::New();

  //Setting the ITK pipeline filter

  LaplacianSharpeningFilter::Pointer lapFilter = LaplacianSharpeningFilter::New();

  reader->SetFileName( inputFilename  );
  writer->SetFileName( outputFilename );

  //Sharpen with the laplacian
  lapFilter->SetInput( reader->GetOutput() );

  // Rescale and cast to unsigned char
  rescale->SetInput( lapFilter->GetOutput() );
  writer->SetInput( rescale->GetOutput() );

  rescale->SetOutputMinimum(   0 );
  rescale->SetOutputMaximum( 255 );

  try
    {
    writer->Update();
    }
  catch( itk::ExceptionObject & err )
    {
    std::cout << "ExceptionObject caught !" << std::endl;
    std::cout << err << std::endl;
    return EXIT_FAILURE;
    }

  return EXIT_SUCCESS;

}