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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: $RCSfile: itkVectorGradientNDAnisotropicDiffusionFunction.h,v $
Language: C++
Date: $Date: 2003-09-10 14:28:59 $
Version: $Revision: 1.12 $
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 __itkVectorGradientNDAnisotropicDiffusionFunction_h_
#define __itkVectorGradientNDAnisotropicDiffusionFunction_h_
#include "itkVectorAnisotropicDiffusionFunction.h"
#include "itkNeighborhoodAlgorithm.h"
#include "itkVectorNeighborhoodInnerProduct.h"
#include "itkDerivativeOperator.h"
namespace itk {
/** \class VectorGradientNDAnisotropicDiffusionFunction
*
* This class is a simple extension of the
* GradientNDAnisotropicDiffusionFunction to pixel types of multiple
* components. Vector components are diffused separately, but diffusion of
* each component is limited by a conductance term which depends on all
* components.
*
* For more information, please see GradientNDAnisotropicDiffusionFunction.
*
* \sa GradientNDAnisotropicDiffusionFunction
* \sa VectorCurvatureNDAnisotropicDiffusionFunction
* \sa AnisotropicDiffusionFunction
*/
template <class TImage>
class ITK_EXPORT VectorGradientNDAnisotropicDiffusionFunction :
public VectorAnisotropicDiffusionFunction<TImage>
{
public:
/** Standard class typedefs. */
typedef VectorGradientNDAnisotropicDiffusionFunction Self;
typedef VectorAnisotropicDiffusionFunction<TImage> Superclass;
typedef SmartPointer<Self> Pointer;
typedef SmartPointer<const Self> ConstPointer;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods) */
itkTypeMacro( VectorGradientNDAnisotropicDiffusionFunction,
ScalarAnisotropicDiffusionFunction );
/** Inherit some parameters from the superclass type. */
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;
/** Extract vector and image dimension from superclass. */
itkStaticConstMacro(ImageDimension, unsigned int,
Superclass::ImageDimension );
itkStaticConstMacro(VectorDimension, unsigned int,
Superclass::VectorDimension );
/** Type of a value in a vector (double, float, etc.) */
typedef typename PixelType::ValueType ScalarValueType;
/** Compute the equation value. */
virtual PixelType ComputeUpdate(const NeighborhoodType &neighborhood,
void * globalData,
const FloatOffsetType& offset = FloatOffsetType(0.0)
);
/** This method is called prior to each iteration of the solver. */
virtual void InitializeIteration()
{
m_K = this->GetAverageGradientMagnitudeSquared() * this->GetConductanceParameter() *
this->GetConductanceParameter() * -2.0f;
}
protected:
VectorGradientNDAnisotropicDiffusionFunction();
~VectorGradientNDAnisotropicDiffusionFunction() {}
private:
VectorGradientNDAnisotropicDiffusionFunction(const Self&); //purposely not implemented
void operator=(const Self&); //purposely not implemented
/** Inner product function. */
VectorNeighborhoodInnerProduct<ImageType> m_InnerProduct;
/** Slices for the ND neighborhood. */
std::slice x_slice[ImageDimension];
std::slice xa_slice[ImageDimension][ImageDimension];
std::slice xd_slice[ImageDimension][ImageDimension];
/** Derivative operators. */
DerivativeOperator<ScalarValueType,
itkGetStaticConstMacro(ImageDimension)> dx_op;
/** Modified global average gradient magnitude term. */
ScalarValueType m_K;
static double m_MIN_NORM;
unsigned long int m_Stride[ImageDimension];
unsigned long int m_Center;
};
}// end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkVectorGradientNDAnisotropicDiffusionFunction.txx"
#endif
#endif
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