itkBinaryErodeImageFilter.h

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/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkBinaryErodeImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2003/09/10 14:28:44 $
  Version:   $Revision: 1.15 $

  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.

     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.

=========================================================================*/
#ifndef __itkBinaryErodeImageFilter_h
#define __itkBinaryErodeImageFilter_h

#include "itkMorphologyImageFilter.h"

namespace itk {

template<class TInputImage, class TOutputImage, class TKernel>
class ITK_EXPORT BinaryErodeImageFilter : 
    public MorphologyImageFilter<TInputImage, TOutputImage, TKernel>
{
public:
  typedef BinaryErodeImageFilter Self;
  typedef MorphologyImageFilter<TInputImage, TOutputImage, TKernel>
  Superclass;
  typedef SmartPointer<Self>        Pointer;
  typedef SmartPointer<const Self>  ConstPointer;
  
  itkNewMacro(Self);  

  itkTypeMacro(BinaryErodeImageFilter, MorphologyImageFilter);
  
  typedef typename Superclass::PixelType PixelType;

  typedef ConstNeighborhoodIterator<TInputImage>  NeighborhoodIteratorType ;

  typedef TKernel KernelType;
  
  typedef typename KernelType::ConstIterator KernelIteratorType ;
  
  itkSetMacro(ErodeValue, PixelType);

  itkGetMacro(ErodeValue, PixelType);
  
protected:
  BinaryErodeImageFilter();
  ~BinaryErodeImageFilter() {};
  void PrintSelf(std::ostream& os, Indent indent) const;

  PixelType Evaluate(const NeighborhoodIteratorType &nit,
                     const KernelIteratorType kernelBegin,
                     const KernelIteratorType kernelEnd);

  virtual void BeforeThreadedGenerateData();

private:
  BinaryErodeImageFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented

  PixelType m_ErodeValue;
  
  // Cache whether the center pixel of the kernel is on (for
  // optimization).
  bool m_KernelCenterPixelOn;

} ; // end of class

} // end namespace itk
  
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkBinaryErodeImageFilter.txx"
#endif

#endif

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