itkSegmentationLevelSetFunction.h

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

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkSegmentationLevelSetFunction.h,v $
  Language:  C++
  Date:      $Date: 2003/09/10 14:29:25 $
  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 __itkSegmentationLevelSetFunction_h_
#define __itkSegmentationLevelSetFunction_h_

#include "itkLevelSetFunction.h"
#include "itkLinearInterpolateImageFunction.h"
#include "itkVectorLinearInterpolateImageFunction.h"
#include "itkVectorCastImageFilter.h"

namespace itk {

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

  itkTypeMacro( SegmentationLevelSetFunction, LevelSetFunction );

  typedef typename Superclass::ImageType ImageType;
  typedef typename Superclass::RadiusType RadiusType;
  typedef TFeatureImageType FeatureImageType;
  typedef typename Superclass::FloatOffsetType FloatOffsetType;
  typedef typename Superclass::ScalarValueType ScalarValueType;
  typedef typename Superclass::NeighborhoodType NeighborhoodType;
  typedef typename FeatureImageType::PixelType FeatureScalarType;
  typedef typename ImageType::IndexType IndexType;
  typedef typename Superclass::VectorType VectorType;
  typedef typename Superclass::GlobalDataStruct GlobalDataStruct;

  typedef Image<VectorType, 
                ::itk::GetImageDimension<TImageType>::ImageDimension > VectorImageType;


  typedef LinearInterpolateImageFunction<ImageType>  InterpolatorType;

  typedef VectorLinearInterpolateImageFunction<VectorImageType> VectorInterpolatorType;
  
  typedef typename InterpolatorType::ContinuousIndexType ContinuousIndexType;
  
  itkStaticConstMacro(ImageDimension, unsigned int,Superclass::ImageDimension);

  virtual const FeatureImageType *GetFeatureImage() const
  { return m_FeatureImage.GetPointer(); }
  virtual void SetFeatureImage(const FeatureImageType *f)
  {    m_FeatureImage = f;  }
  
  virtual ImageType *GetSpeedImage() 
  { return m_SpeedImage.GetPointer(); }

  virtual VectorImageType *GetAdvectionImage() const
  { return m_AdvectionImage.GetPointer(); } 

  virtual void Initialize(const RadiusType &r);

  virtual void CalculateSpeedImage() {}

  virtual void CalculateAdvectionImage() {}

  virtual void AllocateSpeedImage();

  virtual void AllocateAdvectionImage();

  virtual void ReverseExpansionDirection();
  
protected:
  typename FeatureImageType::ConstPointer m_FeatureImage;

  typename ImageType::Pointer        m_SpeedImage;

  typename VectorImageType::Pointer  m_AdvectionImage;

  Functor::VectorCast< ITK_TYPENAME VectorInterpolatorType::OutputType,
                       VectorType > m_VectorCast;

  virtual ScalarValueType PropagationSpeed(const NeighborhoodType &,
                                           const FloatOffsetType &, GlobalDataStruct *gd) const;

  virtual VectorType AdvectionField(const NeighborhoodType &,
                                    const FloatOffsetType &, GlobalDataStruct *gd) const;
  
  
  virtual ~SegmentationLevelSetFunction() {}
  SegmentationLevelSetFunction()
  {
    m_SpeedImage = ImageType::New();
    m_AdvectionImage = VectorImageType::New();
    m_Interpolator = InterpolatorType::New();
    m_VectorInterpolator = VectorInterpolatorType::New();
  }

  typename InterpolatorType::Pointer m_Interpolator;
  typename VectorInterpolatorType::Pointer m_VectorInterpolator;
  
};

} // end namespace

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

#endif

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