itkVectorCurvatureNDAnisotropicDiffusionFunction.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkVectorCurvatureNDAnisotropicDiffusionFunction.h,v $
  Language:  C++
  Date:      $Date: 2002/12/17 17:50:35 $
  Version:   $Revision: 1.7 $

  Copyright (c) 2002 Insight 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 __itkVectorCurvatureNDAnisotropicDiffusionFunction_h_
#define __itkVectorCurvatureNDAnisotropicDiffusionFunction_h_

#include "itkVectorAnisotropicDiffusionFunction.h"
#include "itkNeighborhoodAlgorithm.h"
#include "itkVectorNeighborhoodInnerProduct.h"
#include "itkDerivativeOperator.h"

namespace itk {

template <class TImage>
class VectorCurvatureNDAnisotropicDiffusionFunction :
    public VectorAnisotropicDiffusionFunction<TImage>
{
public:
  typedef VectorCurvatureNDAnisotropicDiffusionFunction Self;
  typedef VectorAnisotropicDiffusionFunction<TImage> Superclass;
  typedef SmartPointer<Self> Pointer;
  typedef SmartPointer<const Self> ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro( VectorCurvatureNDAnisotropicDiffusionFunction,
                VectorAnisotropicDiffusionFunction );
  
  typedef typename Superclass::ImageType        ImageType;
  typedef typename Superclass::PixelType        PixelType;
  typedef typename Superclass::TimeStepType     TimeStepType;
  typedef typename Superclass::RadiusType       RadiusType;
  typedef typename Superclass::NeighborhoodType NeighborhoodType;
  typedef typename Superclass::FloatOffsetType  FloatOffsetType;
  typedef typename PixelType::ValueType ScalarValueType;
  
  itkStaticConstMacro(ImageDimension, unsigned int,
                      Superclass::ImageDimension);
  itkStaticConstMacro(VectorDimension, unsigned int,
                      Superclass::VectorDimension);

  virtual PixelType ComputeUpdate(const NeighborhoodType &neighborhood,
                                  void *globalData,
                                  const FloatOffsetType& offset = FloatOffsetType(0.0)
                                  ) const;

  virtual void InitializeIteration()
    {
      m_K = this->GetAverageGradientMagnitudeSquared() *
        this->GetConductanceParameter() * -1.0f;
    }
  
protected:
  VectorCurvatureNDAnisotropicDiffusionFunction();
  ~VectorCurvatureNDAnisotropicDiffusionFunction() {}
  void PrintSelf(std::ostream& os, Indent indent) const
    {  Superclass::PrintSelf(os,indent);   }

private:
  VectorCurvatureNDAnisotropicDiffusionFunction(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
  
  VectorNeighborhoodInnerProduct<ImageType> m_InnerProduct;

  std::slice  x_slice[ImageDimension];
  std::slice xa_slice[ImageDimension][ImageDimension];
  std::slice xd_slice[ImageDimension][ImageDimension];

  DerivativeOperator<ScalarValueType, itkGetStaticConstMacro(ImageDimension)> dx_op;

  double m_K;

  static double m_MIN_NORM;

  unsigned long m_Center;
  unsigned long m_Stride[ImageDimension];
};
  
}// end namespace itk

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

#endif

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