itkImageToSpatialObjectMetric.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
 *
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 *  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 itkImageToSpatialObjectMetric_h
#define itkImageToSpatialObjectMetric_h

#include "itkSingleValuedCostFunction.h"
#include "itkMinimumMaximumImageCalculator.h"
#include "itkLinearInterpolateImageFunction.h"
#include "vnl/vnl_vector_fixed.h"
#include "itkTransform.h"

namespace itk
{
template< typename TFixedImage, typename TMovingSpatialObject >
class ITK_TEMPLATE_EXPORT ImageToSpatialObjectMetric:
  public SingleValuedCostFunction
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(ImageToSpatialObjectMetric);

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

  using FixedImageType = TFixedImage;

  using MovingSpatialObjectType = TMovingSpatialObject;

  using CoordinateRepresentationType = Superclass::ParametersValueType;

  static constexpr unsigned int ImageDimension = FixedImageType::ImageDimension;

  static constexpr unsigned int ObjectDimension = MovingSpatialObjectType::ObjectDimension;

  using TransformType = Transform< CoordinateRepresentationType,
                     Self::ObjectDimension,
                     Self::ImageDimension >;

  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 = LinearInterpolateImageFunction<
    TFixedImage,
    CoordinateRepresentationType >;

  using InterpolatorPointer = typename InterpolatorType::Pointer;

  using VectorType = vnl_vector_fixed< double,
                            Self::ObjectDimension >;

  using MeasureType = Superclass::MeasureType;

  using DerivativeType = Superclass::DerivativeType;

  using FixedImagePointer = typename FixedImageType::Pointer;

  using MovingSpatialObjectPointer = typename MovingSpatialObjectType::Pointer;

  using FixedImageConstPointer = typename FixedImageType::ConstPointer;

  using MovingSpatialObjectConstPointer = typename MovingSpatialObjectType::ConstPointer;

  using ParametersType = Superclass::ParametersType;

  itkTypeMacro(ImageToSpatialObjectMetric, Object);

  itkSetConstObjectMacro(FixedImage, FixedImageType);
  itkGetConstObjectMacro(FixedImage, FixedImageType);

  itkSetConstObjectMacro(MovingSpatialObject, MovingSpatialObjectType);
  itkGetConstObjectMacro(MovingSpatialObject, MovingSpatialObjectType);

  itkSetObjectMacro(Interpolator, InterpolatorType);

  itkGetModifiableObjectMacro(Interpolator, InterpolatorType);

  void GetValueAndDerivative(const ParametersType & parameters,
                                     MeasureType & Value,
                                     DerivativeType  & Derivative) const override = 0;

  unsigned int GetNumberOfParameters() const override;

  virtual void Initialize();

  itkGetConstReferenceMacro(LastTransformParameters, ParametersType);

  itkSetObjectMacro(Transform, TransformType);

protected:

  ImageToSpatialObjectMetric();
  ~ImageToSpatialObjectMetric() override = default;

  void PrintSelf(std::ostream & os, Indent indent) const override;

  MeasureType              m_MatchMeasure{0};
  DerivativeType           m_MatchMeasureDerivatives;
  mutable TransformPointer m_Transform;
  InterpolatorPointer      m_Interpolator;

  MovingSpatialObjectConstPointer m_MovingSpatialObject;
  FixedImageConstPointer          m_FixedImage;
  ParametersType                  m_LastTransformParameters;
};
} // end namespace itk

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

#endif