itkSegmentationLevelSetFunction.h

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/*=========================================================================
 *
 *  Copyright NumFOCUS
 *
 *  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 itkSegmentationLevelSetFunction_h
#define itkSegmentationLevelSetFunction_h
 
#include "itkLevelSetFunction.h"
#include "itkLinearInterpolateImageFunction.h"
#include "itkVectorLinearInterpolateImageFunction.h"
#include "itkCastImageFilter.h"
 
namespace itk
{
template <typename TImageType, typename TFeatureImageType = TImageType>
class ITK_TEMPLATE_EXPORT SegmentationLevelSetFunction : public LevelSetFunction<TImageType>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(SegmentationLevelSetFunction);
 
  using Self = SegmentationLevelSetFunction;
  using Superclass = LevelSetFunction<TImageType>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;
 
  itkTypeMacro(SegmentationLevelSetFunction, LevelSetFunction);
 
  using ImageType = typename Superclass::ImageType;
  using RadiusType = typename Superclass::RadiusType;
  using PixelRealType = typename Superclass::PixelRealType;
  using FeatureImageType = TFeatureImageType;
  using FloatOffsetType = typename Superclass::FloatOffsetType;
  using ScalarValueType = typename Superclass::ScalarValueType;
  using NeighborhoodType = typename Superclass::NeighborhoodType;
  using FeatureScalarType = typename FeatureImageType::PixelType;
  using IndexType = typename ImageType::IndexType;
  using VectorType = typename Superclass::VectorType;
  using GlobalDataStruct = typename Superclass::GlobalDataStruct;
 
  static constexpr unsigned int ImageDimension = Superclass::ImageDimension;
 
  using VectorImageType = Image<VectorType, Self::ImageDimension>;
 
  using InterpolatorType = LinearInterpolateImageFunction<ImageType>;
 
  using VectorInterpolatorType = VectorLinearInterpolateImageFunction<VectorImageType>;
 
  using ContinuousIndexType = typename InterpolatorType::ContinuousIndexType;
 
  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();
  }
  void
  SetSpeedImage(ImageType * s);
 
  virtual VectorImageType *
  GetAdvectionImage() const
  {
    return m_AdvectionImage.GetPointer();
  }
  void
  SetAdvectionImage(VectorImageType * s);
 
  void
  Initialize(const RadiusType & r) override;
 
  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;
 
  ScalarValueType
  PropagationSpeed(const NeighborhoodType &, const FloatOffsetType &, GlobalDataStruct * gd) const override;
 
  VectorType
  AdvectionField(const NeighborhoodType &, const FloatOffsetType &, GlobalDataStruct * gd) const override;
 
  ~SegmentationLevelSetFunction() override = default;
  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;
};
} // namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkSegmentationLevelSetFunction.hxx"
#endif
 
#endif