itkForwardDifferenceOperator.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkForwardDifferenceOperator.h,v $
  Language:  C++
  Date:      $Date: 2008-10-16 23:25:41 $
  Version:   $Revision: 1.17 $

  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 __itkForwardDifferenceOperator_h
#define __itkForwardDifferenceOperator_h

#include "itkNeighborhoodOperator.h"
#include "itkExceptionObject.h"

namespace itk {

template<class TPixel, unsigned int VDimension=2,
  class TAllocator = NeighborhoodAllocator<TPixel> >
class ITK_EXPORT ForwardDifferenceOperator
  : public NeighborhoodOperator<TPixel, VDimension, TAllocator>
{
public:

  typedef ForwardDifferenceOperator                               Self;
  typedef NeighborhoodOperator<TPixel, VDimension, TAllocator>    Superclass;

  typedef typename Superclass::PixelType PixelType;

  ForwardDifferenceOperator() {}

  ForwardDifferenceOperator(const Self& other)
    : NeighborhoodOperator<TPixel, VDimension, TAllocator>(other) { }

  Self &operator=(const Self& other)
  {
    Superclass::operator=(other);
    return *this;
  }

protected:
  typedef typename Superclass::CoefficientVector CoefficientVector;

  CoefficientVector GenerateCoefficients();

  void Fill(const CoefficientVector &coeff)

    { this->FillCenteredDirectional(coeff); }

};
  

} // namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkForwardDifferenceOperator.txx"
#endif

#endif