itkShapePriorSegmentationLevelSetFunction.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkShapePriorSegmentationLevelSetFunction.h,v $
  Language:  C++
  Date:      $Date: 2009-01-27 19:30:16 $
  Version:   $Revision: 1.6 $

  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 __itkShapePriorSegmentationLevelSetFunction_h
#define __itkShapePriorSegmentationLevelSetFunction_h

#include "itkSegmentationLevelSetFunction.h"
#include "itkShapeSignedDistanceFunction.h"

namespace itk {

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

  itkNewMacro(Self);

  itkTypeMacro( ShapePriorSegmentationLevelSetFunction, SegmentationLevelSetFunction );

  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 Superclass::FloatOffsetType     FloatOffsetType;
  typedef typename Superclass::VectorImageType     VectorImageType;
  typedef typename Superclass::PixelType           PixelType;
  typedef typename Superclass::TimeStepType        TimeStepType;
  typedef typename Superclass::IndexType           IndexType;
  typedef typename Superclass::ContinuousIndexType ContinuousIndexType;

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

  typedef ShapeSignedDistanceFunction<double,
                                      itkGetStaticConstMacro(ImageDimension)> ShapeFunctionType;
  typedef typename ShapeFunctionType::ConstPointer           ShapeFunctionPointer;

  void SetShapePriorWeight( const ScalarValueType p )
    { m_ShapePriorWeight = p; }
  ScalarValueType GetShapePriorWeight() const
    { return m_ShapePriorWeight; }

  void SetShapeFunction( const ShapeFunctionType * ptr )
    { m_ShapeFunction = ptr; }
  const ShapeFunctionType * GetShapeFunction() const
    { return m_ShapeFunction; }


  virtual PixelType ComputeUpdate(const NeighborhoodType &neighborhood,
                                  void *globalData,
                                  const FloatOffsetType& = FloatOffsetType(0.0));
  
  virtual TimeStepType ComputeGlobalTimeStep( void *globalData ) const;

  typedef typename Superclass::GlobalDataStruct GlobalDataStruct;
  struct ShapePriorGlobalDataStruct : public GlobalDataStruct
    {
    ScalarValueType m_MaxShapePriorChange;
    };

  virtual void *GetGlobalDataPointer() const
    {
    ShapePriorGlobalDataStruct *ans = new ShapePriorGlobalDataStruct();
    ans->m_MaxAdvectionChange   = NumericTraits<ScalarValueType>::Zero;
    ans->m_MaxPropagationChange = NumericTraits<ScalarValueType>::Zero;
    ans->m_MaxCurvatureChange   = NumericTraits<ScalarValueType>::Zero;
    ans->m_MaxShapePriorChange  = NumericTraits<ScalarValueType>::Zero;
    return ans; 
    }

  virtual void ReleaseGlobalDataPointer(void *GlobalData) const
    { delete (ShapePriorGlobalDataStruct *) GlobalData; }
  
protected:
  ShapePriorSegmentationLevelSetFunction();
  virtual ~ShapePriorSegmentationLevelSetFunction() {}

  ShapePriorSegmentationLevelSetFunction(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
  
  void PrintSelf(std::ostream& os, Indent indent) const;

private:

  ShapeFunctionPointer   m_ShapeFunction;
  ScalarValueType        m_ShapePriorWeight;
  
};
  
} // end namespace itk

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

#endif