itkCurvesLevelSetFunction.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 itkCurvesLevelSetFunction_h
#define itkCurvesLevelSetFunction_h

#include "itkSegmentationLevelSetFunction.h"

namespace itk
{
template< typename TImageType, typename TFeatureImageType = TImageType >
class ITK_TEMPLATE_EXPORT CurvesLevelSetFunction:
  public SegmentationLevelSetFunction< TImageType, TFeatureImageType >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(CurvesLevelSetFunction);

  using Self = CurvesLevelSetFunction;
  using Superclass = SegmentationLevelSetFunction< TImageType, TFeatureImageType >;
  using SuperSuperclass = LevelSetFunction< TImageType >;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;
  using FeatureImageType = TFeatureImageType;

  itkNewMacro(Self);

  itkTypeMacro(CurvesLevelSetFunction, SegmentationLevelSetFunction);

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

  static constexpr unsigned int ImageDimension = Superclass::ImageDimension;

  void CalculateSpeedImage() override;

  void CalculateAdvectionImage() override;

  ScalarValueType CurvatureSpeed(const NeighborhoodType & neighborhood,
                                         const FloatOffsetType & offset, GlobalDataStruct *gd) const override
  { return this->PropagationSpeed(neighborhood, offset, gd); }

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

  void Initialize(const RadiusType & r) override;

protected:
  CurvesLevelSetFunction()

  {
    //Curvature term is the minimal curvature.
    this->UseMinimalCurvatureOn();
    this->SetAdvectionWeight(NumericTraits< ScalarValueType >::OneValue());
    this->SetPropagationWeight(NumericTraits< ScalarValueType >::OneValue());
    this->SetCurvatureWeight(NumericTraits< ScalarValueType >::OneValue());
  }

  ~CurvesLevelSetFunction() override = default;

  void PrintSelf(std::ostream & os, Indent indent) const override
  {
    Superclass::PrintSelf(os, indent);
    os << indent << "DerivativeSigma: " << m_DerivativeSigma << std::endl;
  }

private:

  std::slice x_slice[ImageDimension];

  OffsetValueType m_Center{0};

  OffsetValueType m_xStride[ImageDimension];

  double m_DerivativeSigma{1.0};
};
} // end namespace itk

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

#endif