text: /*=========================================================================
   *
   *  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 "itkImageFileReader.h"
  #include "itkImageFileWriter.h"
  #include "itkSimpleFilterWatcher.h"
  #include "itkHMaximaImageFilter.h"
  #include "itkHMinimaImageFilter.h"
  #include "itkTestingMacros.h"
  
  int itkHMaximaMinimaImageFilterTest( int argc, char * argv[] )
  {
    if( argc < 4 )
      {
      std::cerr << "Missing parameters." << std::endl;
      std::cerr << "Usage: " << std::endl;
      std::cerr << itkNameOfTestExecutableMacro(argv) << " inputImageFile";
      std::cerr << " outputImageFile height" << std::endl;
      return EXIT_FAILURE;
      }
  
    //
    //  The following code defines the input and output pixel types and their
    //  associated image types.
    //
    constexpr unsigned int Dimension = 2;
  
    using InputPixelType = unsigned short;
    using InternalPixelType = short;
    using OutputPixelType = unsigned char;
  
    using InputImageType = itk::Image< InputPixelType, Dimension >;
    using InternalImageType = itk::Image< InternalPixelType, Dimension >;
    using OutputImageType = itk::Image< OutputPixelType, Dimension >;
  
    // Readers/writers
    using ReaderType = itk::ImageFileReader< InputImageType  >;
    using WriterType = itk::ImageFileWriter< OutputImageType >;
  
    // Define the itk::HMaximaImageFilter filter type
    using HMaximaFilterType = itk::HMaximaImageFilter<
                              InputImageType,
                              InternalImageType >;
    // Define the itk::HMinimaImageFilter filter type
    using HMinimaFilterType = itk::HMinimaImageFilter<
                              InternalImageType,
                              OutputImageType >;
  
  
    // Creation of reader and writer filters
    ReaderType::Pointer reader = ReaderType::New();
    WriterType::Pointer writer = WriterType::New();
  
    // Create the filters
    HMaximaFilterType::Pointer hMaximaFilter = HMaximaFilterType::New();
    HMinimaFilterType::Pointer hMinimaFilter = HMinimaFilterType::New();
  
    itk::SimpleFilterWatcher watchHmaxima( hMaximaFilter, "HMaximaImageFilter" );
    itk::SimpleFilterWatcher watchHminima( hMinimaFilter, "HMinimaImageFilter" );
  
    // Set up the input and output files
    reader->SetFileName( argv[1] );
    writer->SetFileName( argv[2] );
  
    // Set up the filters
    hMaximaFilter->SetInput( reader->GetOutput() );
    hMaximaFilter->SetHeight( static_cast< InputPixelType >( std::stod( argv[3] ) ) );
  
    hMinimaFilter->SetInput( hMaximaFilter->GetOutput() );
    hMinimaFilter->SetHeight( static_cast< InputPixelType >( std::stod( argv[3] ) ) );
  
    // Run the filter
    writer->SetInput( hMinimaFilter->GetOutput() );
  
    TRY_EXPECT_NO_EXCEPTION( writer->Update() );
  
  
    std::cout << "Test finished." << std::endl;
    return EXIT_SUCCESS;
  }
  