itkBSplineExponentialDiffeomorphicTransform.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
 *
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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.
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 *=========================================================================*/
#ifndef itkBSplineExponentialDiffeomorphicTransform_h
#define itkBSplineExponentialDiffeomorphicTransform_h
 
#include "itkConstantVelocityFieldTransform.h"
#include "itkDisplacementFieldToBSplineImageFilter.h"
#include "itkPointSet.h"
 
namespace itk
{

template <typename TParametersValueType, unsigned int VDimension>
class ITK_TEMPLATE_EXPORT BSplineExponentialDiffeomorphicTransform
  : public ConstantVelocityFieldTransform<TParametersValueType, VDimension>
{
public:
  ITK_DISALLOW_COPY_AND_MOVE(BSplineExponentialDiffeomorphicTransform);

  using Self = BSplineExponentialDiffeomorphicTransform;
  using Superclass = ConstantVelocityFieldTransform<TParametersValueType, VDimension>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  itkOverrideGetNameOfClassMacro(BSplineExponentialDiffeomorphicTransform);

  itkNewMacro(Self);

  static constexpr unsigned int ConstantVelocityFieldDimension = VDimension;

  static constexpr unsigned int Dimension = VDimension;

  using typename Superclass::ScalarType;
  using typename Superclass::DerivativeType;
  using DerivativeValueType = typename DerivativeType::ValueType;
 
  using typename Superclass::ParametersType;
  using typename Superclass::ParametersValueType;
  using typename Superclass::FixedParametersType;
  using typename Superclass::FixedParametersValueType;
 
  using typename Superclass::DisplacementFieldType;
  using typename Superclass::DisplacementFieldPointer;
  using typename Superclass::ConstantVelocityFieldType;
  using typename Superclass::ConstantVelocityFieldPointer;
 
  using DisplacementVectorType = typename DisplacementFieldType::PixelType;

  using PointSetType = PointSet<ConstantVelocityFieldType, Dimension>;
  using SplineOrderType = unsigned int;
  using BSplineFilterType = DisplacementFieldToBSplineImageFilter<ConstantVelocityFieldType>;
  using WeightsContainerType = typename BSplineFilterType::WeightsContainerType;
  using ArrayType = typename BSplineFilterType::ArrayType;
  using ArrayValueType = typename ArrayType::ValueType;

  void
  UpdateTransformParameters(const DerivativeType & update, ScalarType factor = 1.0) override;

  virtual ConstantVelocityFieldPointer
  BSplineSmoothConstantVelocityField(const ConstantVelocityFieldType *, const ArrayType &);

  itkSetMacro(SplineOrder, SplineOrderType);
  itkGetConstMacro(SplineOrder, SplineOrderType);

  itkSetMacro(NumberOfControlPointsForTheConstantVelocityField, ArrayType);
  itkGetConstMacro(NumberOfControlPointsForTheConstantVelocityField, ArrayType);

  itkSetMacro(NumberOfControlPointsForTheUpdateField, ArrayType);
  itkGetConstMacro(NumberOfControlPointsForTheUpdateField, ArrayType);

  void
  SetMeshSizeForTheConstantVelocityField(const ArrayType &);

  void
  SetMeshSizeForTheUpdateField(const ArrayType &);
 
protected:
  BSplineExponentialDiffeomorphicTransform();
  ~BSplineExponentialDiffeomorphicTransform() override = default;
 
  void
  PrintSelf(std::ostream &, Indent) const override;
 
private:
  ArrayType m_NumberOfControlPointsForTheConstantVelocityField{};
  ArrayType m_NumberOfControlPointsForTheUpdateField{};
 
  SplineOrderType m_SplineOrder{ 3 };
};
 
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#  include "itkBSplineExponentialDiffeomorphicTransform.hxx"
#endif
 
#endif // itkBSplineExponentialDiffeomorphicTransform_h