itkMinMaxCurvatureFlowFunction.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 itkMinMaxCurvatureFlowFunction_h
#define itkMinMaxCurvatureFlowFunction_h

#include "itkCurvatureFlowFunction.h"
#include "itkNeighborhoodOperator.h"

namespace itk
{
template< typename TImage >
class ITK_TEMPLATE_EXPORT MinMaxCurvatureFlowFunction:
  public CurvatureFlowFunction< TImage >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(MinMaxCurvatureFlowFunction);

  using Self = MinMaxCurvatureFlowFunction;
  using Superclass = CurvatureFlowFunction< TImage >;
  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  itkNewMacro(Self);

  itkTypeMacro(MinMaxCurvatureFlowFunction,
               CurvatureFlowFunction);

  using ImageType = typename Superclass::ImageType;
  using PixelType = typename Superclass::PixelType;
  using RadiusType = typename Superclass::RadiusType;
  using NeighborhoodType = typename Superclass::NeighborhoodType;
  using FloatOffsetType = typename Superclass::FloatOffsetType;

  static constexpr unsigned int ImageDimension = Superclass::ImageDimension;

  using RadiusValueType = typename RadiusType::SizeValueType;

  void SetStencilRadius(const RadiusValueType radius);

  const RadiusValueType & GetRadiusValueType() const
  { return m_StencilRadius; }

  const RadiusValueType & GetStencilRadius() const
  { return GetRadiusValueType(); }

  PixelType ComputeUpdate(const NeighborhoodType & neighborhood,
                                  void *globalData,
                                  const FloatOffsetType & offset = FloatOffsetType(0.0)
                                  ) override;

protected:
  MinMaxCurvatureFlowFunction();
  ~MinMaxCurvatureFlowFunction() override = default;

  using StencilOperatorType = Neighborhood< PixelType, Self::ImageDimension >;
  StencilOperatorType m_StencilOperator;

  void InitializeStencilOperator();

private:
  RadiusValueType m_StencilRadius;

  // To control overloaded versions of ComputeThreshold
  struct DispatchBase {};
  template< signed int VDimension >
  struct Dispatch: public DispatchBase {};

  PixelType ComputeThreshold(const Dispatch< 2 > &,
                             const NeighborhoodType & neighborhood) const;

  PixelType ComputeThreshold(const Dispatch< 3 > &,
                             const NeighborhoodType & neighborhood) const;

  PixelType ComputeThreshold(const DispatchBase &,
                             const NeighborhoodType & neighborhood) const;
};
} // end namespace itk

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

#endif