itkPointSetToImageMetric.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
 *
 *         https://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 itkPointSetToImageMetric_h
#define itkPointSetToImageMetric_h
 
#include "itkImageBase.h"
#include "itkTransform.h"
#include "itkInterpolateImageFunction.h"
#include "itkSingleValuedCostFunction.h"
#include "itkMacro.h"
#include "itkGradientRecursiveGaussianImageFilter.h"
 
namespace itk
{
 
template <typename TFixedPointSet, typename TMovingImage>
class ITK_TEMPLATE_EXPORT PointSetToImageMetric : public SingleValuedCostFunction
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(PointSetToImageMetric);

  using Self = PointSetToImageMetric;
  using Superclass = SingleValuedCostFunction;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  using CoordinateRepresentationType = Superclass::ParametersValueType;

  itkOverrideGetNameOfClassMacro(PointSetToImageMetric);

  using MovingImageType = TMovingImage;
  using MovingImagePixelType = typename TMovingImage::PixelType;
  using MovingImageConstPointer = typename MovingImageType::ConstPointer;

  using FixedPointSetType = TFixedPointSet;
  using FixedPointSetConstPointer = typename FixedPointSetType::ConstPointer;

  static constexpr unsigned int MovingImageDimension = TMovingImage::ImageDimension;
  static constexpr unsigned int FixedPointSetDimension = TFixedPointSet::PointDimension;
 
  using PointIterator = typename FixedPointSetType::PointsContainer::ConstIterator;
  using PointDataIterator = typename FixedPointSetType::PointDataContainer::ConstIterator;

  using TransformType =
    Transform<CoordinateRepresentationType, Self::MovingImageDimension, Self::FixedPointSetDimension>;
 
  using TransformPointer = typename TransformType::Pointer;
  using InputPointType = typename TransformType::InputPointType;
  using OutputPointType = typename TransformType::OutputPointType;
  using TransformParametersType = typename TransformType::ParametersType;
  using TransformJacobianType = typename TransformType::JacobianType;

  using InterpolatorType = InterpolateImageFunction<MovingImageType, CoordinateRepresentationType>;

  using RealType = typename NumericTraits<MovingImagePixelType>::RealType;
  using GradientPixelType = CovariantVector<RealType, Self::MovingImageDimension>;
  using GradientImageType = Image<GradientPixelType, Self::MovingImageDimension>;
  using GradientImagePointer = SmartPointer<GradientImageType>;
  using GradientImageFilterType = GradientRecursiveGaussianImageFilter<MovingImageType, GradientImageType>;
 
  using GradientImageFilterPointer = typename GradientImageFilterType::Pointer;
 
  using InterpolatorPointer = typename InterpolatorType::Pointer;

  using MeasureType = Superclass::MeasureType;

  using DerivativeType = Superclass::DerivativeType;

  using ParametersType = Superclass::ParametersType;

  itkSetConstObjectMacro(FixedPointSet, FixedPointSetType);
  itkGetConstObjectMacro(FixedPointSet, FixedPointSetType);

  itkSetConstObjectMacro(MovingImage, MovingImageType);
  itkGetConstObjectMacro(MovingImage, MovingImageType);

  itkSetObjectMacro(Transform, TransformType);

  itkGetModifiableObjectMacro(Transform, TransformType);

  itkSetObjectMacro(Interpolator, InterpolatorType);

  itkGetModifiableObjectMacro(Interpolator, InterpolatorType);

  itkGetModifiableObjectMacro(GradientImage, GradientImageType);

  itkGetConstReferenceMacro(NumberOfPixelsCounted, SizeValueType);

  void
  SetTransformParameters(const ParametersType & parameters) const;

  itkSetMacro(ComputeGradient, bool);
  itkGetConstReferenceMacro(ComputeGradient, bool);

  unsigned int
  GetNumberOfParameters() const override
  {
    return m_Transform->GetNumberOfParameters();
  }

  virtual void
  Initialize();
 
protected:
  PointSetToImageMetric();
  ~PointSetToImageMetric() override = default;
  void
  PrintSelf(std::ostream & os, Indent indent) const override;
 
  mutable SizeValueType m_NumberOfPixelsCounted{};
 
  FixedPointSetConstPointer m_FixedPointSet{};
 
  MovingImageConstPointer m_MovingImage{};
 
  mutable TransformPointer m_Transform{};
 
  InterpolatorPointer m_Interpolator{};
 
  bool m_ComputeGradient{};
 
  GradientImagePointer m_GradientImage{};
};
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkPointSetToImageMetric.hxx"
#endif
 
#endif