itkBSplineSmoothingOnUpdateDisplacementFieldTransform.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 itkBSplineSmoothingOnUpdateDisplacementFieldTransform_h
#define itkBSplineSmoothingOnUpdateDisplacementFieldTransform_h

#include "itkDisplacementFieldTransform.h"

#include "itkDisplacementFieldToBSplineImageFilter.h"
#include "itkPointSet.h"

namespace itk
{

template<typename TParametersValueType, unsigned int NDimensions>
class ITK_TEMPLATE_EXPORT BSplineSmoothingOnUpdateDisplacementFieldTransform :
  public DisplacementFieldTransform<TParametersValueType, NDimensions>
{
public:
  ITK_DISALLOW_COPY_AND_ASSIGN(BSplineSmoothingOnUpdateDisplacementFieldTransform);

  using Self = BSplineSmoothingOnUpdateDisplacementFieldTransform;
  using Superclass = DisplacementFieldTransform<TParametersValueType, NDimensions>;
  using Pointer = SmartPointer<Self>;
  using ConstPointer = SmartPointer<const Self>;

  itkTypeMacro( BSplineSmoothingOnUpdateDisplacementFieldTransform, DisplacementFieldTransform );

  itkNewMacro( Self );

  static constexpr unsigned int Dimension = NDimensions;

  using ScalarType = typename Superclass::ScalarType;
  using DerivativeType = typename Superclass::DerivativeType;
  using DerivativeValueType = typename DerivativeType::ValueType;
  using DisplacementFieldType = typename Superclass::DisplacementFieldType;
  using DisplacementFieldPointer = typename Superclass::DisplacementFieldPointer;
  using DisplacementFieldConstPointer = typename Superclass::DisplacementFieldConstPointer;

  using TransformPointer =
          typename Transform<TParametersValueType,NDimensions, NDimensions>::Pointer;

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

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

  itkSetMacro( SplineOrder, SplineOrderType );

  itkGetConstMacro( SplineOrder, SplineOrderType );

  itkSetMacro( NumberOfControlPointsForTheUpdateField, ArrayType );

  itkGetConstMacro( NumberOfControlPointsForTheUpdateField, ArrayType );

  void SetMeshSizeForTheUpdateField( const ArrayType & );

  itkSetMacro( NumberOfControlPointsForTheTotalField, ArrayType );

  itkGetConstMacro( NumberOfControlPointsForTheTotalField, ArrayType );

  void SetMeshSizeForTheTotalField( const ArrayType & );

  itkBooleanMacro( EnforceStationaryBoundary );
  itkSetMacro( EnforceStationaryBoundary, bool );
  itkGetConstMacro( EnforceStationaryBoundary, bool );

protected:
  BSplineSmoothingOnUpdateDisplacementFieldTransform();
  ~BSplineSmoothingOnUpdateDisplacementFieldTransform() override = default;

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

  typename LightObject::Pointer InternalClone() const override;

   DisplacementFieldPointer BSplineSmoothDisplacementField( const DisplacementFieldType *, const ArrayType & );

private:
  SplineOrderType             m_SplineOrder{ 3 };
  bool                        m_EnforceStationaryBoundary{ true };
  ArrayType                   m_NumberOfControlPointsForTheUpdateField;
  ArrayType                   m_NumberOfControlPointsForTheTotalField;
};

} // end namespace itk

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

#endif // itkBSplineSmoothingOnUpdateDisplacementFieldTransform_h