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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: 2008-10-16 16:45:08 $
00007   Version:   $Revision: 1.17 $
00008 
00009   Copyright (c) Insight Software 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 ITK_EXPORT 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::PixelRealType    PixelRealType;
00080   typedef typename Superclass::TimeStepType     TimeStepType;
00081   typedef typename Superclass::RadiusType       RadiusType;
00082   typedef typename Superclass::NeighborhoodType NeighborhoodType;
00083   typedef typename Superclass::FloatOffsetType  FloatOffsetType;
00084 
00086   itkStaticConstMacro(ImageDimension, unsigned int,Superclass::ImageDimension);
00087 
00089   virtual PixelType ComputeUpdate(const NeighborhoodType &neighborhood,
00090                                   void *globalData,
00091                                   const FloatOffsetType& offset = FloatOffsetType(0.0)
00092     );
00093 
00095   virtual void InitializeIteration()
00096     {
00097     m_K = static_cast<PixelType>(this->GetAverageGradientMagnitudeSquared() *
00098                                  this->GetConductanceParameter() * this->GetConductanceParameter() * -2.0f);
00099     }
00100 
00101 protected:
00102   GradientNDAnisotropicDiffusionFunction();
00103   ~GradientNDAnisotropicDiffusionFunction() {}
00104 
00106   NeighborhoodInnerProduct<ImageType> m_InnerProduct;
00107 
00109   std::slice  x_slice[ImageDimension];
00110   std::slice xa_slice[ImageDimension][ImageDimension];
00111   std::slice xd_slice[ImageDimension][ImageDimension];
00112 
00114   DerivativeOperator<PixelType, itkGetStaticConstMacro(ImageDimension)> dx_op;
00115 
00117   PixelType m_K;
00118 
00119   unsigned long m_Center;
00120   unsigned long m_Stride[ImageDimension];
00121 
00122   static double m_MIN_NORM;
00123   
00124 private:
00125   GradientNDAnisotropicDiffusionFunction(const Self&); //purposely not implemented
00126   void operator=(const Self&); //purposely not implemented
00127 
00128 };
00129   
00130 }// end namespace itk
00131 
00132 #ifndef ITK_MANUAL_INSTANTIATION
00133 #include "itkGradientNDAnisotropicDiffusionFunction.txx"
00134 #endif
00135 
00136 #endif
00137 

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