itkCurvatureAnisotropicDiffusionImageFilter.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkCurvatureAnisotropicDiffusionImageFilter.h,v $
  Language:  C++
  Date:      $Date: 2003/09/10 14:28:46 $
  Version:   $Revision: 1.29 $

  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 __itkCurvatureAnisotropicDiffusionImageFilter_h_
#define __itkCurvatureAnisotropicDiffusionImageFilter_h_

#include "itkAnisotropicDiffusionImageFilter.h"
#include "itkCurvatureNDAnisotropicDiffusionFunction.h"
#include "itkMacro.h"
namespace itk {

template <class TInputImage, class TOutputImage>
class ITK_EXPORT CurvatureAnisotropicDiffusionImageFilter
  : public AnisotropicDiffusionImageFilter<TInputImage, TOutputImage>
{
public:
  typedef CurvatureAnisotropicDiffusionImageFilter Self;
  typedef AnisotropicDiffusionImageFilter<TInputImage, TOutputImage>
  Superclass;
  typedef SmartPointer<Self> Pointer;
  typedef SmartPointer<const Self> ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(CurvatureAnisotropicDiffusionImageFilter,
               AnisotropicDiffusionImageFilter);
  
  typedef typename Superclass::UpdateBufferType UpdateBufferType;
  
  itkStaticConstMacro(ImageDimension, unsigned int,
                      Superclass::ImageDimension);
  
protected:
  CurvatureAnisotropicDiffusionImageFilter()
  {
    typename CurvatureNDAnisotropicDiffusionFunction<UpdateBufferType>::Pointer q
      = CurvatureNDAnisotropicDiffusionFunction<UpdateBufferType>::New();
    this->SetDifferenceFunction(q);
  }
  ~CurvatureAnisotropicDiffusionImageFilter() {}

  virtual void InitializeIteration()
  {
    Superclass::InitializeIteration();
    if (this->GetTimeStep() >  0.5 / pow(2.0, static_cast<double>(ImageDimension))  )
      {
      itkWarningMacro(<< "Anisotropic diffusion is using a time step which may introduce instability into the solution." );
      }
  }
  
private:
  CurvatureAnisotropicDiffusionImageFilter(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented

};

} // end namspace itk

#endif

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