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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
*
* http://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 itkDeformationVectorFieldTransform_h
#define itkDeformationVectorFieldTransform_h
#include "itkAdvancedBSplineDeformableTransform.h"
namespace itk
{
/** \class DeformationVectorFieldTransform
* \brief An itk transform based on a DeformationVectorField
*
* This class makes it easy to set a deformation vector field
* as a Transform-object.
*
* The class inherits from the 0th-order AdvancedBSplineDeformableTransform,
* and converts a VectorImage to the B-spline CoefficientImage.
*
* This is useful if you know for example how to deform each voxel
* in an image and want to apply it to that image.
*
* \ingroup Transforms
*
* \note Better use the DeformationFieldInterpolatingTransform.
* It is more flexible, since it allows runtime specification of
* the spline order.
*/
template <class TScalarType = double, unsigned int NDimensions = 3>
class ITK_TEMPLATE_EXPORT DeformationVectorFieldTransform
: public AdvancedBSplineDeformableTransform<TScalarType, NDimensions, 0>
{
public:
ITK_DISALLOW_COPY_AND_MOVE(DeformationVectorFieldTransform);
/** Standard class typedefs. */
using Self = DeformationVectorFieldTransform;
using Superclass = AdvancedBSplineDeformableTransform<TScalarType, NDimensions, 0>;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** Method for creation through the object factory. */
itkNewMacro(Self);
/** Run-time type information (and related methods). */
itkTypeMacro(DeformationVectorFieldTransform, AdvancedBSplineDeformableTransform);
/** Dimension of the domain space. */
itkStaticConstMacro(SpaceDimension, unsigned int, NDimensions);
itkStaticConstMacro(SplineOrder, unsigned int, Superclass::SplineOrder);
/** Typedef's inherited from Superclass. */
using typename Superclass::ScalarType;
using typename Superclass::ParametersType;
using typename Superclass::JacobianType;
using typename Superclass::InputVectorType;
using typename Superclass::OutputVectorType;
using typename Superclass::InputCovariantVectorType;
using typename Superclass::OutputCovariantVectorType;
using typename Superclass::InputVnlVectorType;
using typename Superclass::OutputVnlVectorType;
using typename Superclass::InputPointType;
using typename Superclass::OutputPointType;
/** Parameters as SpaceDimension number of images. */
using CoefficientPixelType = typename Superclass::PixelType;
using CoefficientImageType = typename Superclass::ImageType;
using CoefficientImagePointer = typename Superclass::ImagePointer;
/** Typedef's for VectorImage. */
using CoefficientVectorPixelType = Vector<float, Self::SpaceDimension>;
using CoefficientVectorImageType = Image<CoefficientVectorPixelType, Self::SpaceDimension>;
using CoefficientVectorImagePointer = typename CoefficientVectorImageType::Pointer;
/** Set the coefficient image as a deformation field.
* The superclass provides a similar function (SetCoeffficientImage),
* but this function expects an array of nr_of_dim scalar images.
* The SetCoefficientVectorImage method accepts a VectorImage,
* which is often more convenient.
* The method internally just converts this vector image to
* nr_of_dim scalar images and passes it on to the
* SetCoefficientImage function.
*/
virtual void
SetCoefficientVectorImage(const CoefficientVectorImageType * vecImage);
/** Get the coefficient image as a vector image.
* The vector image is created only on demand. The caller is
* expected to provide a smart pointer to the resulting image;
* this stresses the fact that this method does not return a member
* variable, like most Get... methods.
*/
virtual void
GetCoefficientVectorImage(CoefficientVectorImagePointer & vecImage) const;
protected:
/** The constructor. */
DeformationVectorFieldTransform();
/** The destructor. */
~DeformationVectorFieldTransform() override;
private:
/** Member variables. */
CoefficientImagePointer m_Images[SpaceDimension]{};
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
# include "itkDeformationVectorFieldTransform.hxx"
#endif
#endif // end #ifndef itkDeformationVectorFieldTransform_h
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