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 "itkMaximumEntropyThresholdImageFilter.h"
  
  #include "itkImageFileReader.h"
  #include "itkImageFileWriter.h"
  #include "itkSimpleFilterWatcher.h"
  #include "itkTestingMacros.h"
  
  int itkMaximumEntropyThresholdImageFilterTest(int argc, char* argv[] )
  {
    if( argc < 3 )
      {
      std::cerr << "Usage: " << itkNameOfTestExecutableMacro(argv);
      std::cerr << " inputImageFile outputImageFile";
      std::cerr << std::endl;
      return EXIT_FAILURE;
      }
  
    using InputPixelType = short;
    using OutputPixelType = unsigned char;
  
    using InputImageType = itk::Image< InputPixelType,  2 >;
    using OutputImageType = itk::Image< OutputPixelType, 2 >;
  
    using FilterType = itk::MaximumEntropyThresholdImageFilter<
                 InputImageType, OutputImageType >;
  
    using ReaderType = itk::ImageFileReader< InputImageType >;
  
    using WriterType = itk::ImageFileWriter< OutputImageType >;
  
    ReaderType::Pointer reader = ReaderType::New();
    FilterType::Pointer filter = FilterType::New();
    WriterType::Pointer writer = WriterType::New();
  
    itk::SimpleFilterWatcher watcher(filter);
  
    filter->SetInsideValue( 255 );
    TEST_SET_GET_VALUE( 255, filter->GetInsideValue() );
  
    filter->SetOutsideValue( 0 );
    TEST_SET_GET_VALUE( 0, filter->GetOutsideValue() );
  
    reader->SetFileName( argv[1] );
    filter->SetInput( reader->GetOutput() );
    // filter->SetNumberOfHistogramBins (std::stoi(argv[3]));
    writer->SetInput( filter->GetOutput() );
  
    filter->Update();
    std::cout << "Computed Threshold is: "
              << itk::NumericTraits<FilterType::InputPixelType>::PrintType(filter->GetThreshold())
              << std::endl;
    writer->SetFileName( argv[2] );
    writer->Update();
  
    return EXIT_SUCCESS;
  }
  