itkLaplacianOperator.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkLaplacianOperator.h,v $
  Language:  C++
  Date:      $Date: 2009-02-05 19:05:00 $
  Version:   $Revision: 1.11 $

  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 __itkLaplacianOperator_h
#define __itkLaplacianOperator_h

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

namespace itk {

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

  typedef LaplacianOperator Self;

  typedef NeighborhoodOperator<TPixel, VDimension, TAllocator>  Superclass;

  typedef typename Superclass::PixelType PixelType;
  typedef typename Superclass::SizeType  SizeType;

  LaplacianOperator()
    {
    for (unsigned i = 0; i < VDimension; ++i)
      {
      m_DerivativeScalings[i] = 1.0;
      }
    }

  LaplacianOperator(const Self& other)
    : NeighborhoodOperator<TPixel, VDimension, TAllocator>(other) 
    {
    for (unsigned i = 0; i < VDimension; ++i)
      {
      m_DerivativeScalings[i] = other.m_DerivativeScalings[i];
      }
    }

  void CreateOperator();  

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

  virtual void PrintSelf(std::ostream &os, Indent i) const  
  { 
    os << i << "LaplacianOperator { this=" << this
       << "}" << std::endl;
    Superclass::PrintSelf(os, i.GetNextIndent());
  }

  void SetDerivativeScalings( const double *s );

protected:
  typedef typename Superclass::CoefficientVector CoefficientVector;

  CoefficientVector GenerateCoefficients();

  void Fill(const CoefficientVector &);

private:
  double m_DerivativeScalings[VDimension];

};

} // namespace itk

// Define instantiation macro for this template.
#define ITK_TEMPLATE_LaplacianOperator(_, EXPORT, x, y) namespace itk { \
  _(2(class EXPORT LaplacianOperator< ITK_TEMPLATE_2 x >)) \
  namespace Templates { typedef LaplacianOperator< ITK_TEMPLATE_2 x > \
                                                  LaplacianOperator##y; } \
  }

#if ITK_TEMPLATE_EXPLICIT
# include "Templates/itkLaplacianOperator+-.h"
#endif

#if ITK_TEMPLATE_TXX
# include "itkLaplacianOperator.txx"
#endif

#endif