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 itkMovingHistogramErodeImageFilter_h
  #define itkMovingHistogramErodeImageFilter_h
  
  #include "itkMovingHistogramMorphologyImageFilter.h"
  
  namespace itk
  {
  /**
   * \class MovingHistogramErodeImageFilter
   * \brief gray scale erosion of an image
   *
   * Erode an image using grayscale morphology. Erode takes the
   * minimum of all the pixels identified by the structuring element.
   *
   * The structuring element is assumed to be composed of binary
   * values (zero or one). Only elements of the structuring element
   * having values > 0 are candidates for affecting the center pixel.
   *
   * \sa MorphologyImageFilter, GrayscaleFunctionMorphologicalGradientImageFilter, BinaryMorphologicalGradientImageFilter
   * \ingroup ImageEnhancement  MathematicalMorphologyImageFilters
   * \ingroup ITKMathematicalMorphology
   */
  
  template< typename TInputImage, typename TOutputImage, typename TKernel >
  class MovingHistogramErodeImageFilter:
    public MovingHistogramMorphologyImageFilter< TInputImage, TOutputImage, TKernel,
                                                 typename Function::MorphologyHistogram< typename TInputImage::PixelType,
                                                                                         typename std::less< typename
                                                                                                             TInputImage
                                                                                                             ::PixelType > > >
  {
  public:
    /** Standard class typedefs. */
    typedef MovingHistogramErodeImageFilter Self;
    typedef MovingHistogramMorphologyImageFilter< TInputImage, TOutputImage, TKernel,
                                                  typename Function::MorphologyHistogram< typename TInputImage::PixelType,
                                                                                          typename std::less< typename
                                                                                                              TInputImage
                                                                                                              ::PixelType > > >  Superclass;
    typedef SmartPointer< Self >       Pointer;
    typedef SmartPointer< const Self > ConstPointer;
  
    /** Standard New method. */
    itkNewMacro(Self);
  
    /** Runtime information support. */
    itkTypeMacro(MovingHistogramErodeImageFilter,
                 MovingHistogramMorphologyImageFilter);
  
    /** Image related typedefs. */
    typedef TInputImage                                InputImageType;
    typedef TOutputImage                               OutputImageType;
    typedef typename TInputImage::RegionType           RegionType;
    typedef typename TInputImage::SizeType             SizeType;
    typedef typename TInputImage::IndexType            IndexType;
    typedef typename TInputImage::PixelType            PixelType;
    typedef typename TInputImage::OffsetType           OffsetType;
    typedef typename Superclass::OutputImageRegionType OutputImageRegionType;
    typedef typename TOutputImage::PixelType           OutputPixelType;
  
    /** Image related typedefs. */
    itkStaticConstMacro(ImageDimension, unsigned int,
                        TInputImage::ImageDimension);
  
  protected:
    MovingHistogramErodeImageFilter()
    {
      this->m_Boundary = NumericTraits< PixelType >::max();
    }
  
    ~MovingHistogramErodeImageFilter() {}
  
  private:
    ITK_DISALLOW_COPY_AND_ASSIGN(MovingHistogramErodeImageFilter);
  };                                               // end of class
  } // end namespace itk
  
  #endif
  