itkLevelSetMotionRegistrationFunction.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 itkLevelSetMotionRegistrationFunction_h
#define itkLevelSetMotionRegistrationFunction_h

#include "itkPDEDeformableRegistrationFunction.h"
#include "itkPoint.h"
#include "itkCovariantVector.h"
#include "itkLinearInterpolateImageFunction.h"
#include "itkSmoothingRecursiveGaussianImageFilter.h"
#include <mutex>

namespace itk
{
template< typename TFixedImage, typename TMovingImage, typename TDisplacementField >
class ITK_TEMPLATE_EXPORT LevelSetMotionRegistrationFunction:
  public PDEDeformableRegistrationFunction< TFixedImage,
                                            TMovingImage,
                                            TDisplacementField >
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(LevelSetMotionRegistrationFunction);

  using Self = LevelSetMotionRegistrationFunction;
  using Superclass = PDEDeformableRegistrationFunction< TFixedImage,
                                             TMovingImage, TDisplacementField >;

  using Pointer = SmartPointer< Self >;
  using ConstPointer = SmartPointer< const Self >;

  itkNewMacro(Self);

  itkTypeMacro(LevelSetMotionRegistrationFunction,
               PDEDeformableRegistrationFunction);

  using MovingImageType = typename Superclass::MovingImageType;
  using MovingImagePointer = typename Superclass::MovingImagePointer;
  using MovingSpacingType = typename MovingImageType::SpacingType;

  using FixedImageType = typename Superclass::FixedImageType;
  using FixedImagePointer = typename Superclass::FixedImagePointer;
  using IndexType = typename FixedImageType::IndexType;
  using SizeType = typename FixedImageType::SizeType;
  using SpacingType = typename FixedImageType::SpacingType;

  using DisplacementFieldType = typename Superclass::DisplacementFieldType;
  using DisplacementFieldTypePointer = typename Superclass::DisplacementFieldTypePointer;

  static constexpr unsigned int ImageDimension = Superclass::ImageDimension;

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

  using CoordRepType = double;
  using InterpolatorType = InterpolateImageFunction< MovingImageType, CoordRepType >;
  using InterpolatorPointer = typename InterpolatorType::Pointer;
  using PointType = typename InterpolatorType::PointType;
  using DefaultInterpolatorType =
      LinearInterpolateImageFunction< MovingImageType, CoordRepType >;

  using VectorType = Vector< double, Self::ImageDimension >;
  using CovariantVectorType =
      CovariantVector< double, Self::ImageDimension >;

  using MovingImageSmoothingFilterType = SmoothingRecursiveGaussianImageFilter<MovingImageType>;
  using MovingImageSmoothingFilterPointer = typename MovingImageSmoothingFilterType::Pointer;

  void SetMovingImageInterpolator(InterpolatorType *ptr)
  { m_MovingImageInterpolator = ptr; }

  InterpolatorType * GetMovingImageInterpolator()
  { return m_MovingImageInterpolator; }

  TimeStepType ComputeGlobalTimeStep(void *GlobalData) const override;

  void * GetGlobalDataPointer() const override
  {
    auto * global = new GlobalDataStruct();

    global->m_SumOfSquaredDifference  = 0.0;
    global->m_NumberOfPixelsProcessed = 0L;
    global->m_SumOfSquaredChange      = 0;
    global->m_MaxL1Norm            = NumericTraits< double >::NonpositiveMin();
    return global;
  }

  void ReleaseGlobalDataPointer(void *GlobalData) const override;

  void InitializeIteration() override;

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

  virtual double GetMetric() const
  { return m_Metric; }

  virtual double GetRMSChange() const
  { return m_RMSChange; }

  virtual void SetAlpha(double);

  virtual double GetAlpha() const;

  virtual void SetIntensityDifferenceThreshold(double);

  virtual double GetIntensityDifferenceThreshold() const;

  virtual void SetGradientMagnitudeThreshold(double);

  virtual double GetGradientMagnitudeThreshold() const;

  virtual void SetGradientSmoothingStandardDeviations(double);

  virtual double GetGradientSmoothingStandardDeviations() const;

  void SetUseImageSpacing(bool);

  bool GetUseImageSpacing() const;

protected:
  LevelSetMotionRegistrationFunction();
  ~LevelSetMotionRegistrationFunction() override = default;
  void PrintSelf(std::ostream & os, Indent indent) const override;

  using FixedImageNeighborhoodIteratorType = ConstNeighborhoodIterator<FixedImageType>;

  struct GlobalDataStruct {
    double m_SumOfSquaredDifference;
    SizeValueType m_NumberOfPixelsProcessed;
    double m_SumOfSquaredChange;
    double m_MaxL1Norm;
  };

private:
  SpacingType m_FixedImageSpacing;
  PointType   m_FixedImageOrigin;

  MovingImageSmoothingFilterPointer m_MovingImageSmoothingFilter;

  InterpolatorPointer m_MovingImageInterpolator;
  InterpolatorPointer m_SmoothMovingImageInterpolator;

  double m_Alpha;

  double m_GradientMagnitudeThreshold;

  double m_IntensityDifferenceThreshold;

  double m_GradientSmoothingStandardDeviations;

  mutable double        m_Metric;
  mutable double        m_SumOfSquaredDifference;
  mutable SizeValueType m_NumberOfPixelsProcessed;
  mutable double        m_RMSChange;
  mutable double        m_SumOfSquaredChange;

  mutable std::mutex m_MetricCalculationLock;

  bool m_UseImageSpacing;
};
} // end namespace itk

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

#endif