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.
   *
   *=========================================================================*/
  
  #ifndef itkMaximumEntropyThresholdImageFilter_h
  #define itkMaximumEntropyThresholdImageFilter_h
  
  #include "itkHistogramThresholdImageFilter.h"
  #include "itkMaximumEntropyThresholdCalculator.h"
  
  namespace itk {
  
  /** \class MaximumEntropyThresholdImageFilter
   * \brief Threshold an image using the MaximumEntropy Threshold
   *
   * This filter creates a binary thresholded image that separates an
   * image into foreground and background components. The filter
   * computes the threshold using the MaximumEntropyThresholdCalculator and
   * applies that threshold to the input image using the
   * BinaryThresholdImageFilter.
   *
   * \author Richard Beare. Department of Medicine, Monash University,
   * Melbourne, Australia.
   * \author Gaetan Lehmann. Biologie du Developpement et de la Reproduction, INRA de Jouy-en-Josas, France.
   *
   * This implementation was taken from the Insight Journal paper:
   * https://hdl.handle.net/10380/3279  or
   * http://www.insight-journal.org/browse/publication/811
   *
   * \sa HistogramThresholdImageFilter
   *
   * \ingroup Multithreaded
   * \ingroup ITKThresholding
   */
  
  template<typename TInputImage, typename TOutputImage, typename TMaskImage=TOutputImage>
  class MaximumEntropyThresholdImageFilter :
      public HistogramThresholdImageFilter<TInputImage, TOutputImage, TMaskImage>
  {
  public:
    /** Standard Self typedef */
    typedef MaximumEntropyThresholdImageFilter                          Self;
    typedef HistogramThresholdImageFilter<TInputImage,TOutputImage,
                                          TMaskImage>                   Superclass;
    typedef SmartPointer<Self>                                          Pointer;
    typedef SmartPointer<const Self>                                    ConstPointer;
  
    /** Method for creation through the object factory. */
    itkNewMacro(Self);
  
    /** Runtime information support. */
    itkTypeMacro(MaximumEntropyThresholdImageFilter, HistogramThresholdImageFilter);
  
    typedef TInputImage                       InputImageType;
    typedef TOutputImage                      OutputImageType;
    typedef TMaskImage                        MaskImageType;
  
    /** Image pixel value typedef. */
    typedef typename InputImageType::PixelType   InputPixelType;
    typedef typename OutputImageType::PixelType  OutputPixelType;
    typedef typename MaskImageType::PixelType    MaskPixelType;
  
    /** Image related typedefs. */
    typedef typename InputImageType::Pointer  InputImagePointer;
    typedef typename OutputImageType::Pointer OutputImagePointer;
  
    typedef typename InputImageType::SizeType    InputSizeType;
    typedef typename InputImageType::IndexType   InputIndexType;
    typedef typename InputImageType::RegionType  InputImageRegionType;
    typedef typename OutputImageType::SizeType   OutputSizeType;
    typedef typename OutputImageType::IndexType  OutputIndexType;
    typedef typename OutputImageType::RegionType OutputImageRegionType;
    typedef typename MaskImageType::SizeType     MaskSizeType;
    typedef typename MaskImageType::IndexType    MaskIndexType;
    typedef typename MaskImageType::RegionType   MaskImageRegionType;
  
    typedef typename Superclass::HistogramType                        HistogramType;
    typedef MaximumEntropyThresholdCalculator< HistogramType, InputPixelType > CalculatorType;
  
    /** Image related typedefs. */
    itkStaticConstMacro(InputImageDimension, unsigned int,
                        InputImageType::ImageDimension );
    itkStaticConstMacro(OutputImageDimension, unsigned int,
                        OutputImageType::ImageDimension );
  
  protected:
    MaximumEntropyThresholdImageFilter()
      {
      this->SetCalculator( CalculatorType::New() );
      }
    ~MaximumEntropyThresholdImageFilter(){};
  
  private:
    ITK_DISALLOW_COPY_AND_ASSIGN(MaximumEntropyThresholdImageFilter);
  }; // end of class
  
  } // end namespace itk
  
  #endif
  