itkCyclicBSplineDeformableTransform.h

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 *  Copyright UMC Utrecht and contributors
 *
 *  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
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 *        http://www.apache.org/licenses/LICENSE-2.0.txt
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 *  distributed under the License is distributed on an "AS IS" BASIS,
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 *  See the License for the specific language governing permissions and
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#ifndef itkCyclicBSplineDeformableTransform_h
#define itkCyclicBSplineDeformableTransform_h
 
#include "itkAdvancedTransform.h"
#include "itkImage.h"
#include "itkImageRegion.h"
#include "itkBSplineInterpolationWeightFunction2.h"
#include "itkBSplineInterpolationDerivativeWeightFunction.h"
#include "itkBSplineInterpolationSecondOrderDerivativeWeightFunction.h"
#include "itkAdvancedBSplineDeformableTransform.h"
#include "itkCyclicBSplineDeformableTransform.h"
 
namespace itk
{

template <typename TScalarType = double, // Data type for scalars
          unsigned int NDimensions = 3,  // Number of dimensions
          unsigned int VSplineOrder = 3>
// Spline order
class ITK_TEMPLATE_EXPORT CyclicBSplineDeformableTransform
  : public AdvancedBSplineDeformableTransform<TScalarType, NDimensions, VSplineOrder>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(CyclicBSplineDeformableTransform);

  using Self = CyclicBSplineDeformableTransform;
  using Superclass = AdvancedBSplineDeformableTransform<TScalarType, NDimensions, VSplineOrder>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  itkNewMacro(Self);

  itkOverrideGetNameOfClassMacro(CyclicBSplineDeformableTransform);

  itkStaticConstMacro(SpaceDimension, unsigned int, NDimensions);

  itkStaticConstMacro(SplineOrder, unsigned int, VSplineOrder);
 
  using typename Superclass::JacobianType;
  using typename Superclass::SpatialJacobianType;
  using typename Superclass::NonZeroJacobianIndicesType;
  using typename Superclass::JacobianOfSpatialJacobianType;
  using typename Superclass::SpatialHessianType;
  using typename Superclass::JacobianOfSpatialHessianType;
  using typename Superclass::InternalMatrixType;
  using typename Superclass::ParametersType;
  using typename Superclass::NumberOfParametersType;

  using PixelType = typename ParametersType::ValueType;
  using ImageType = Image<PixelType, Self::SpaceDimension>;
  using ImagePointer = typename ImageType::Pointer;
 
  using typename Superclass::RegionType;
  using IndexType = typename RegionType::IndexType;
  using SizeType = typename RegionType::SizeType;
  using SpacingType = typename ImageType::SpacingType;
  using DirectionType = typename ImageType::DirectionType;
  using OriginType = typename ImageType::PointType;
  using GridOffsetType = typename RegionType::IndexType;
  using typename Superclass::InputPointType;
  using typename Superclass::OutputPointType;
  using typename Superclass::WeightsType;
  using typename Superclass::ParameterIndexArrayType;
  using typename Superclass::ContinuousIndexType;
  using typename Superclass::ScalarType;
  using typename Superclass::JacobianImageType;
  using typename Superclass::JacobianPixelType;
  using typename Superclass::WeightFunctionBaseType;
  using typename Superclass::WeightsFunctionType;
  using RedWeightsFunctionType =
    BSplineInterpolationWeightFunction2<ScalarType, Self::SpaceDimension - 1, VSplineOrder>;
  using RedContinuousIndexType = typename RedWeightsFunctionType::ContinuousIndexType;

  void
  SetGridRegion(const RegionType & region) override;

  OutputPointType
  TransformPoint(const InputPointType & point) const override;

  virtual void
  GetJacobian(const InputPointType & inputPoint, WeightsType & weights, ParameterIndexArrayType & indices) const;

  void
  GetSpatialJacobian(const InputPointType & inputPoint, SpatialJacobianType & sj) const override;
 
protected:
  CyclicBSplineDeformableTransform();
  ~CyclicBSplineDeformableTransform() override = default;
 
  void
  ComputeNonZeroJacobianIndices(NonZeroJacobianIndicesType & nonZeroJacobianIndices,
                                const RegionType &           supportRegion) const override;

  bool
  InsideValidRegion(const ContinuousIndexType & index) const override;

  virtual void
  SplitRegion(const RegionType & imageRegion,
              const RegionType & inRegion,
              RegionType &       outRegion1,
              RegionType &       outRegion2) const;
 
private:
  // Private using-declaration, to avoid `-Woverloaded-virtual` warnings from GCC (GCC 11.4) or clang (macos-12).
  using Superclass::GetJacobian;
};
 
} // namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkCyclicBSplineDeformableTransform.hxx"
#endif
 
#endif /* itkCyclicBSplineDeformableTransform_h */