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itkGradientNDAnisotropicDiffusionFunction.h

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00001 /*=========================================================================
00002 
00003   Program:   Insight Segmentation & Registration Toolkit
00004   Module:    $RCSfile: itkGradientNDAnisotropicDiffusionFunction.h,v $
00005   Language:  C++
00006   Date:      $Date: 2002/12/17 17:50:35 $
00007   Version:   $Revision: 1.10 $
00008 
00009   Copyright (c) 2002 Insight Consortium. All rights reserved.
00010   See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
00011 
00012      This software is distributed WITHOUT ANY WARRANTY; without even 
00013      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
00014      PURPOSE.  See the above copyright notices for more information.
00015 
00016 =========================================================================*/
00017 #ifndef __itkGradientNDAnisotropicDiffusionFunction_h_
00018 #define __itkGradientNDAnisotropicDiffusionFunction_h_
00019 
00020 #include "itkScalarAnisotropicDiffusionFunction.h"
00021 #include "itkNeighborhoodAlgorithm.h"
00022 #include "itkNeighborhoodInnerProduct.h"
00023 #include "itkDerivativeOperator.h"
00024 
00025 namespace itk {
00026 
00058 template <class TImage>
00059 class GradientNDAnisotropicDiffusionFunction :
00060     public ScalarAnisotropicDiffusionFunction<TImage>
00061 {
00062 public:
00064   typedef GradientNDAnisotropicDiffusionFunction Self;
00065   typedef ScalarAnisotropicDiffusionFunction<TImage> Superclass;
00066   typedef SmartPointer<Self> Pointer;
00067   typedef SmartPointer<const Self> ConstPointer;
00068 
00070   itkNewMacro(Self);
00071 
00073   itkTypeMacro( GradientNDAnisotropicDiffusionFunction,
00074                 ScalarAnisotropicDiffusionFunction );
00075   
00077   typedef typename Superclass::ImageType        ImageType;
00078   typedef typename Superclass::PixelType        PixelType;
00079   typedef typename Superclass::TimeStepType     TimeStepType;
00080   typedef typename Superclass::RadiusType       RadiusType;
00081   typedef typename Superclass::NeighborhoodType NeighborhoodType;
00082   typedef typename Superclass::FloatOffsetType  FloatOffsetType;
00083 
00085   itkStaticConstMacro(ImageDimension, unsigned int,Superclass::ImageDimension);
00086 
00088   virtual PixelType ComputeUpdate(const NeighborhoodType &neighborhood,
00089                                   void *globalData,
00090                                   const FloatOffsetType& offset = FloatOffsetType(0.0)
00091                                   ) const;
00092 
00094   virtual void InitializeIteration()
00095     {
00096       m_K = static_cast<PixelType>(this->GetAverageGradientMagnitudeSquared() *
00097                                    this->GetConductanceParameter() * -1.0f);
00098     }
00099   
00100 protected:
00101   GradientNDAnisotropicDiffusionFunction();
00102   ~GradientNDAnisotropicDiffusionFunction() {}
00103 
00104   void PrintSelf(std::ostream& os, Indent indent) const
00105     {      Superclass::PrintSelf(os,indent);    }
00106   
00108   NeighborhoodInnerProduct<ImageType> m_InnerProduct;
00109 
00111   std::slice  x_slice[ImageDimension];
00112   std::slice xa_slice[ImageDimension][ImageDimension];
00113   std::slice xd_slice[ImageDimension][ImageDimension];
00114 
00116   DerivativeOperator<PixelType, itkGetStaticConstMacro(ImageDimension)> dx_op;
00117 
00119   PixelType m_K;
00120 
00121   unsigned long m_Center;
00122   unsigned long m_Stride[ImageDimension];
00123 
00124   static double m_MIN_NORM;
00125   
00126 private:
00127   GradientNDAnisotropicDiffusionFunction(const Self&); //purposely not implemented
00128   void operator=(const Self&); //purposely not implemented
00129 
00130 };
00131   
00132 }// end namespace itk
00133 
00134 #ifndef ITK_MANUAL_INSTANTIATION
00135 #include "itkGradientNDAnisotropicDiffusionFunction.txx"
00136 #endif
00137 
00138 #endif

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