itkCannySegmentationLevelSetFunction.h

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/*=========================================================================
 *
 *  Copyright Insight Software Consortium
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *  See the License for the specific language governing permissions and
 *  limitations under the License.
 *
 *=========================================================================*/
#ifndef __itkCannySegmentationLevelSetFunction_h
#define __itkCannySegmentationLevelSetFunction_h

#include "itkSegmentationLevelSetFunction.h"
#include "itkCastImageFilter.h"
#include "itkCannyEdgeDetectionImageFilter.h"
#include "itkDanielssonDistanceMapImageFilter.h"

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

  itkNewMacro(Self);

  itkTypeMacro(CannySegmentationLevelSetFunction, SegmentationLevelSetFunction);

  typedef typename Superclass::ImageType         ImageType;
  typedef typename Superclass::ScalarValueType   ScalarValueType;
  typedef typename Superclass::VectorImageType   VectorImageType;
  typedef typename Superclass::FeatureScalarType FeatureScalarType;
  typedef typename Superclass::RadiusType        RadiusType;

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

  void SetThreshold(ScalarValueType v)
  { m_Threshold = v; }
  ScalarValueType GetThreshold() const
  { return m_Threshold; }

  void SetVariance(double v)
  { m_Variance = v; }
  double GetVariance() const
  { return m_Variance; }

  virtual void CalculateSpeedImage();

  virtual void CalculateAdvectionImage();

  virtual void CalculateDistanceImage();

  virtual void Initialize(const RadiusType & r)
  {
    Superclass::Initialize(r);

    this->SetAdvectionWeight(-1.0 * NumericTraits< ScalarValueType >::One);
    this->SetPropagationWeight(-1.0 * NumericTraits< ScalarValueType >::One);
    this->SetCurvatureWeight(NumericTraits< ScalarValueType >::One);
  }

  ImageType * GetCannyImage()
  { return m_Canny->GetOutput(); }
protected:
  CannySegmentationLevelSetFunction()
  {
    m_Variance = 0.0;
    m_Threshold = NumericTraits< ScalarValueType >::Zero;
    m_Caster = CastImageFilter< FeatureImageType, ImageType >::New();
    m_Canny = CannyEdgeDetectionImageFilter< ImageType, ImageType >::New();
    m_Distance = DanielssonDistanceMapImageFilter< ImageType, ImageType >::New();
  }

  virtual ~CannySegmentationLevelSetFunction() {}

  CannySegmentationLevelSetFunction(const Self &); //purposely not implemented
  void operator=(const Self &);                    //purposely not implemented

private:
  ScalarValueType m_Variance;
  double          m_Threshold;

  typename CannyEdgeDetectionImageFilter< ImageType, ImageType >::Pointer m_Canny;

  typename DanielssonDistanceMapImageFilter< ImageType, ImageType >::Pointer m_Distance;

  typename CastImageFilter< FeatureImageType, ImageType >::Pointer m_Caster;

  template <class DummyImagePointerType>
  void AssignCannyInput(typename FeatureImageType::Pointer &feature,
                        DummyImagePointerType &)
  {
    m_Caster->SetInput(feature);
    m_Canny->SetInput( m_Caster->GetOutput() );
  }

  void AssignCannyInput(typename FeatureImageType::Pointer &feature,
                        typename FeatureImageType::Pointer &)
  {
    m_Canny->SetInput(feature);
  }
};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkCannySegmentationLevelSetFunction.hxx"
#endif

#endif