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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 itkTimeVaryingBSplineVelocityFieldTransformParametersAdaptor_h
#define itkTimeVaryingBSplineVelocityFieldTransformParametersAdaptor_h
#include "itkTransformParametersAdaptor.h"
namespace itk
{
/** \class TimeVaryingBSplineVelocityFieldTransformParametersAdaptor
* \brief TimeVaryingBSplineVelocityFieldTransformParametersAdaptor is a helper class intended to
* definition.
*
* The fixed parameters store the following information:
* \li B-spline mesh size
* \li field origin
* \li domain spacing
* \li domain size (note that domain_spacing * (domain_size - 1) = physical dimensions of transform domain)
* \li field direction
* During multiresolution image registration it is often desired to also increase
* the displacement field resolution for greater flexibility in optimizing the
* transform. As defined in the base class, the user can change the resolution via
*
\code
transformAdaptor->SetTransform( transform );
transformAdaptor->SetRequiredFixedParameters( fixedParameters );
transformAdaptor->AdaptTransformParameters();
\endcode
*
* or the user can use the more intuitive API for setting the fixed parameters.
* E.g., often the user will want to maintain the same transform domain spatial
* extent but only increase the field size and decrease the spacing. This can
* be done as follows:
*
\code
transformAdaptor->SetRequiredTransformDomainOrigin( displacementField->GetOrigin() );
transformAdaptor->SetRequiredTransformDomainDirection( displacementField->GetDirection() );
transformAdaptor->SetRequiredTransformDomainSize( requiredSize );
transformAdaptor->SetRequiredTransformDomainSpacing( requiredSpacing );
transformAdaptor->SetRequiredTransformDomainMeshSize( requiredMeshSize );
transformAdaptor->SetSplineOrder( transform->GetSplineOrder() );
transformAdaptor->AdaptTransformParameters();
\endcode
*
* \author Nick Tustison
* \author Brian Avants
*
* \ingroup ITKRegistrationCommon
*/
template <typename TTransform>
class ITK_TEMPLATE_EXPORT TimeVaryingBSplineVelocityFieldTransformParametersAdaptor
: public TransformParametersAdaptor<TTransform>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(TimeVaryingBSplineVelocityFieldTransformParametersAdaptor);
/** Standard class type aliases. */
using Self = TimeVaryingBSplineVelocityFieldTransformParametersAdaptor;
using Superclass = TransformParametersAdaptor<TTransform>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** New macro for creation of through a Smart Pointer. */
itkNewMacro(Self);
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(TimeVaryingBSplineVelocityFieldTransformParametersAdaptor);
/** Typedefs associated with the transform */
using TransformType = TTransform;
using TransformPointer = typename TransformType::Pointer;
using ParametersType = typename TransformType::ParametersType;
using ParametersValueType = typename TransformType::ParametersValueType;
using FixedParametersType = typename TransformType::FixedParametersType;
using FixedParametersValueType = typename TransformType::FixedParametersValueType;
using TimeVaryingVelocityFieldControlPointLatticeType =
typename TransformType::TimeVaryingVelocityFieldControlPointLatticeType;
using TimeVaryingVelocityFieldControlPointLatticePointer =
typename TimeVaryingVelocityFieldControlPointLatticeType::Pointer;
using RegionType = typename TimeVaryingVelocityFieldControlPointLatticeType::RegionType;
using IndexType = typename TimeVaryingVelocityFieldControlPointLatticeType::IndexType;
using VectorType = typename TimeVaryingVelocityFieldControlPointLatticeType::PixelType;
using OriginType = typename TimeVaryingVelocityFieldControlPointLatticeType::PointType;
using SpacingType = typename TimeVaryingVelocityFieldControlPointLatticeType::SpacingType;
using SizeType = typename TimeVaryingVelocityFieldControlPointLatticeType::SizeType;
using SizeValueType = typename TimeVaryingVelocityFieldControlPointLatticeType::SizeValueType;
using MeshSizeType = typename TimeVaryingVelocityFieldControlPointLatticeType::SizeType;
using DirectionType = typename TimeVaryingVelocityFieldControlPointLatticeType::DirectionType;
/** Dimension of parameters. */
static constexpr unsigned int TotalDimension = TransformType::Dimension + 1;
/** Set spline order (usually from transform) */
itkSetMacro(SplineOrder, SizeValueType);
/** Get spline order (usually from transform) */
itkGetConstMacro(SplineOrder, SizeValueType);
/** Alternative method for setting the required mesh size. */
void
SetRequiredTransformDomainMeshSize(const MeshSizeType &);
/** Get the required mesh size. */
itkGetConstReferenceMacro(RequiredTransformDomainMeshSize, MeshSizeType);
/** Alternative method for setting the required sampled size. */
void
SetRequiredTransformDomainSize(const SizeType &);
/** Get the required domain size. */
itkGetConstReferenceMacro(RequiredTransformDomainSize, SizeType);
/** Alternative method for setting the required sampled spacing. */
void
SetRequiredTransformDomainSpacing(const SpacingType &);
/** Get the required domain spacing. */
itkGetConstReferenceMacro(RequiredTransformDomainSpacing, SpacingType);
/** Alternative method for setting the required origin. */
void
SetRequiredTransformDomainOrigin(const OriginType &);
/** Get the required origin. */
itkGetConstReferenceMacro(RequiredTransformDomainOrigin, OriginType);
/** Alternative method for setting the required direction. */
void
SetRequiredTransformDomainDirection(const DirectionType &);
/** Get the required direction. */
itkGetConstReferenceMacro(RequiredTransformDomainDirection, DirectionType);
/** Get the required control point lattice origin. */
const OriginType
GetRequiredControlPointLatticeOrigin() const
{
OriginType requiredLatticeOrigin;
for (SizeValueType i = 0; i < TotalDimension; ++i)
{
requiredLatticeOrigin[i] = this->m_RequiredFixedParameters[TotalDimension + i];
}
return requiredLatticeOrigin;
}
/** Get the required control point lattice spacing. */
const SpacingType
GetRequiredControlPointLatticeSpacing() const
{
SpacingType requiredLatticeSpacing;
for (SizeValueType i = 0; i < TotalDimension; ++i)
{
FixedParametersValueType domainPhysicalDimensions =
static_cast<FixedParametersValueType>(this->m_RequiredTransformDomainSize[i] - 1.0) *
this->m_RequiredTransformDomainSpacing[i];
requiredLatticeSpacing[i] =
domainPhysicalDimensions / static_cast<FixedParametersValueType>(this->m_RequiredTransformDomainMeshSize[i]);
}
return requiredLatticeSpacing;
}
/** Get the required control point lattice size. */
const SizeType
GetRequiredControlPointLatticeSize() const
{
SizeType requiredLatticeSize;
for (SizeValueType i = 0; i < TotalDimension; ++i)
{
requiredLatticeSize[i] = static_cast<SizeValueType>(this->m_RequiredFixedParameters[i]);
}
return requiredLatticeSize;
}
/** Get the required control point lattice direction. */
const DirectionType
GetRequiredControlPointLatticeDirection() const
{
return this->m_RequiredTransformDomainDirection;
}
/** Initialize the transform using the specified fixed parameters */
void
AdaptTransformParameters() override;
void
SetRequiredFixedParameters(const FixedParametersType) override;
protected:
TimeVaryingBSplineVelocityFieldTransformParametersAdaptor();
~TimeVaryingBSplineVelocityFieldTransformParametersAdaptor() override = default;
void
PrintSelf(std::ostream & os, Indent indent) const override;
private:
/** Helper function to set m_RequiredFixedParameters */
void
UpdateRequiredFixedParameters();
MeshSizeType m_RequiredTransformDomainMeshSize{};
OriginType m_RequiredTransformDomainOrigin{};
DirectionType m_RequiredTransformDomainDirection{};
SpacingType m_RequiredTransformDomainSpacing{};
SizeType m_RequiredTransformDomainSize{};
SizeValueType m_SplineOrder{};
}; // class TimeVaryingBSplineVelocityFieldTransformParametersAdaptor
} // namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkTimeVaryingBSplineVelocityFieldTransformParametersAdaptor.hxx"
#endif
#endif /* itkTimeVaryingBSplineVelocityFieldTransformParametersAdaptor_h */
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