itkCurvesLevelSetFunction.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkCurvesLevelSetFunction.h,v $
  Language:  C++
  Date:      $Date: 2008-10-23 16:15:23 $
  Version:   $Revision: 1.4 $

  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 __itkCurvesLevelSetFunction_h
#define __itkCurvesLevelSetFunction_h

#include "itkSegmentationLevelSetFunction.h"

namespace itk {

template <class TImageType, class TFeatureImageType = TImageType>
class ITK_EXPORT CurvesLevelSetFunction
  : public SegmentationLevelSetFunction<TImageType, TFeatureImageType>
{
public:
  typedef CurvesLevelSetFunction                   Self;
  typedef SegmentationLevelSetFunction<TImageType> Superclass;
  typedef LevelSetFunction<TImageType>             SuperSuperclass;
  typedef SmartPointer<Self>                       Pointer;
  typedef SmartPointer<const Self>                 ConstPointer;
  typedef TFeatureImageType                        FeatureImageType;

  itkNewMacro(Self);

  itkTypeMacro( CurvesLevelSetFunction, SegmentationLevelSetFunction );

  typedef typename SuperSuperclass::PixelType        PixelType;
  typedef typename Superclass::ImageType             ImageType;
  typedef typename Superclass::NeighborhoodType      NeighborhoodType;
  typedef typename Superclass::ScalarValueType       ScalarValueType;
  typedef typename Superclass::FeatureScalarType     FeatureScalarType;
  typedef typename Superclass::RadiusType            RadiusType;
  typedef typename SuperSuperclass::FloatOffsetType  FloatOffsetType;
  typedef typename SuperSuperclass::GlobalDataStruct GlobalDataStruct;
  typedef typename Superclass::VectorImageType       VectorImageType;

  itkStaticConstMacro(ImageDimension, unsigned int,
                      Superclass::ImageDimension);

  virtual void CalculateSpeedImage();

  virtual void CalculateAdvectionImage();

  virtual ScalarValueType CurvatureSpeed(const NeighborhoodType & neighborhood,
                                         const FloatOffsetType & offset, GlobalDataStruct *gd ) const
  { return PropagationSpeed( neighborhood, offset, gd ); }

  void SetDerivativeSigma( const double v )
    { m_DerivativeSigma = v; }
  double GetDerivativeSigma()
    { return m_DerivativeSigma; }

  virtual void Initialize(const RadiusType &r);
  
protected:
  CurvesLevelSetFunction()
    {
    //Curvature term is the minimal curvature.
    this->UseMinimalCurvatureOn();
    this->SetAdvectionWeight( NumericTraits<ScalarValueType>::One );
    this->SetPropagationWeight( NumericTraits<ScalarValueType>::One );
    this->SetCurvatureWeight( NumericTraits<ScalarValueType>::One );
    
    m_DerivativeSigma = 1.0;
    }
  virtual ~CurvesLevelSetFunction() {}

  CurvesLevelSetFunction(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
  
  void PrintSelf(std::ostream& os, Indent indent) const
    {
    Superclass::PrintSelf(os, indent );
    os << indent << "DerivativeSigma: " << m_DerivativeSigma << std::endl;
    }

private:
  
  std::slice x_slice[ImageDimension];

  ::size_t m_Center;

  ::size_t m_xStride[ImageDimension];

  
  double m_DerivativeSigma;
  
};
  
} // end namespace itk

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

#endif

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