itkDisplacementFieldTransform.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
 *
 *  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 __itkDisplacementFieldTransform_h
#define __itkDisplacementFieldTransform_h

#include "itkTransform.h"

#include "itkImage.h"
#include "itkMatrixOffsetTransformBase.h"
#include "itkImageVectorOptimizerParametersHelper.h"
#include "itkVectorInterpolateImageFunction.h"

namespace itk
{

template
<class TScalar, unsigned int NDimensions>
class ITK_EXPORT DisplacementFieldTransform :
  public Transform<TScalar, NDimensions, NDimensions>
{
public:
  typedef DisplacementFieldTransform                   Self;
  typedef Transform<TScalar, NDimensions, NDimensions> Superclass;
  typedef SmartPointer<Self>                           Pointer;
  typedef SmartPointer<const Self>                     ConstPointer;

  itkTypeMacro( DisplacementFieldTransform, Transform );

  itkNewMacro( Self );

  typedef typename Superclass::InverseTransformBasePointer InverseTransformBasePointer;

  typedef typename Superclass::ScalarType ScalarType;

  typedef typename Superclass::ParametersType          ParametersType;
  typedef typename Superclass::ParametersValueType     ParametersValueType;

  typedef typename Superclass::JacobianType JacobianType;

  typedef typename Superclass::NumberOfParametersType NumberOfParametersType;

  typedef typename Superclass::InputPointType  InputPointType;
  typedef typename Superclass::OutputPointType OutputPointType;

  typedef typename Superclass::InputVectorType  InputVectorType;
  typedef typename Superclass::OutputVectorType OutputVectorType;

  typedef typename Superclass::InputVectorPixelType  InputVectorPixelType;
  typedef typename Superclass::OutputVectorPixelType OutputVectorPixelType;

  typedef typename Superclass::InputCovariantVectorType
  InputCovariantVectorType;
  typedef typename Superclass::OutputCovariantVectorType
  OutputCovariantVectorType;

  typedef typename Superclass::InputVnlVectorType  InputVnlVectorType;
  typedef typename Superclass::OutputVnlVectorType OutputVnlVectorType;

  typedef typename Superclass::InputDiffusionTensor3DType
  InputDiffusionTensor3DType;
  typedef typename Superclass::OutputDiffusionTensor3DType
  OutputDiffusionTensor3DType;

  typedef CovariantVector<ScalarType, InputDiffusionTensor3DType::Dimension>
  InputTensorEigenVectorType;
  typedef CovariantVector<ScalarType, OutputDiffusionTensor3DType::Dimension>
  OutputTensorEigenVectorType;

  typedef typename Superclass::DerivativeType DerivativeType;

  itkStaticConstMacro( Dimension, unsigned int, NDimensions );

  typedef Image<OutputVectorType,  Dimension>          DisplacementFieldType;
  typedef typename DisplacementFieldType::Pointer      DisplacementFieldPointer;

  typedef VectorInterpolateImageFunction
    <DisplacementFieldType, ScalarType> InterpolatorType;

  typedef typename DisplacementFieldType::IndexType      IndexType;
  typedef typename DisplacementFieldType::RegionType     RegionType;
  typedef typename DisplacementFieldType::SizeType       SizeType;
  typedef typename DisplacementFieldType::SpacingType    SpacingType;
  typedef typename DisplacementFieldType::DirectionType  DirectionType;
  typedef typename DisplacementFieldType::PointType      PointType;
  typedef typename DisplacementFieldType::PixelType      PixelType;

  typedef ImageVectorOptimizerParametersHelper<
    ScalarType,
    OutputVectorType::Dimension,
    Dimension>
  OptimizerParametersHelperType;

  itkGetObjectMacro( DisplacementField, DisplacementFieldType );

  virtual void SetDisplacementField( DisplacementFieldType* field );

  itkGetObjectMacro( InverseDisplacementField, DisplacementFieldType );
  virtual void SetInverseDisplacementField( DisplacementFieldType * inverseDisplacementField );

  itkGetObjectMacro( Interpolator, InterpolatorType );
  /* Create out own set accessor that assigns the displacement field */
  virtual void SetInterpolator( InterpolatorType* interpolator );

  itkGetConstReferenceMacro( DisplacementFieldSetTime, unsigned long );

  virtual OutputPointType TransformPoint( const InputPointType& thisPoint )
  const;

  using Superclass::TransformVector;
  virtual OutputVectorType TransformVector(const InputVectorType &) const
  {
    itkExceptionMacro( "TransformVector(Vector) unimplemented, use "
                       "TransformVector(Vector,Point)" );
  }

  virtual OutputVectorPixelType TransformVector(const InputVectorPixelType &)
  const
  {
    itkExceptionMacro( "TransformVector(Vector) unimplemented, use "
                       "TransformVector(Vector,Point)" );
  }

  virtual OutputVnlVectorType TransformVector(const InputVnlVectorType &) const
  {
    itkExceptionMacro( "TransformVector(Vector) unimplemented, use "
                       "TransformVector(Vector,Point)" );
  }

  using Superclass::TransformDiffusionTensor3D;
  OutputDiffusionTensor3DType TransformDiffusionTensor(
    const InputDiffusionTensor3DType & ) const
  {
    itkExceptionMacro( "TransformDiffusionTensor(Tensor) unimplemented, use "
                       "TransformDiffusionTensor(Tensor,Point)" );
  }

  OutputVectorPixelType TransformDiffusionTensor(const InputVectorPixelType & )
  const
  {
    itkExceptionMacro( "TransformDiffusionTensor(Tensor) unimplemented, use "
                       "TransformDiffusionTensor(Tensor,Point)" );
  }

  using Superclass::TransformCovariantVector;
  virtual OutputCovariantVectorType TransformCovariantVector(
    const InputCovariantVectorType &) const
  {
    itkExceptionMacro( "TransformCovariantVector(CovariantVector) "
                       "unimplemented, use TransformCovariantVector(CovariantVector,Point)" );
  }

  virtual OutputVectorPixelType TransformCovariantVector(
    const InputVectorPixelType &) const
  {
    itkExceptionMacro( "TransformCovariantVector(CovariantVector) "
                       "unimplemented, use TransformCovariantVector(CovariantVector,Point)" );
  }

  virtual void SetParameters(const ParametersType & params)
  {
    if( &(this->m_Parameters) != &params )
      {
      if( params.Size() != this->m_Parameters.Size() )
        {
        itkExceptionMacro("Input parameters size (" << params.Size()
                                                    << ") does not match internal size ("
                                                    << this->m_Parameters.Size() << ").");
        }
      /* copy into existing object */
      this->m_Parameters = params;
      this->Modified();
      }
  }

  virtual void SetFixedParameters( const ParametersType & );

  virtual void ComputeJacobianWithRespectToParameters(const InputPointType &,
                                                      JacobianType & j) const
  {
    j = this->m_IdentityJacobian;
  }

  virtual void ComputeJacobianWithRespectToParameters(const IndexType &,
                                                      JacobianType & j) const
  {
    j = this->m_IdentityJacobian;
  }

  virtual void ComputeJacobianWithRespectToPosition(const InputPointType  & x, JacobianType & j ) const;

  virtual void ComputeInverseJacobianWithRespectToPosition(const InputPointType  & x, JacobianType & j ) const;

  virtual void ComputeJacobianWithRespectToPosition(const IndexType  & x, JacobianType & j ) const;

  virtual void GetInverseJacobianOfForwardFieldWithRespectToPosition(const InputPointType & point,
                                                                     JacobianType & jacobian,
                                                                     bool useSVD = false )
  const;

  virtual void GetInverseJacobianOfForwardFieldWithRespectToPosition(const IndexType & index, JacobianType & jacobian,
                                                                     bool useSVD = false )
  const;

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

  bool GetInverse( Self *inverse ) const;

  virtual InverseTransformBasePointer GetInverseTransform() const;

  virtual bool IsLinear() const
  {
    return false;
  }

  virtual NumberOfParametersType GetNumberOfLocalParameters(void) const
  {
    return Dimension;
  }

  virtual bool HasLocalSupport() const
  {
    return true;
  }

protected:

  DisplacementFieldTransform();
  virtual ~DisplacementFieldTransform();
  void PrintSelf( std::ostream& os, Indent indent ) const;

  typename DisplacementFieldType::Pointer      m_DisplacementField;
  typename DisplacementFieldType::Pointer      m_InverseDisplacementField;

  typename InterpolatorType::Pointer          m_Interpolator;

  unsigned long m_DisplacementFieldSetTime;

  JacobianType m_IdentityJacobian;
private:
  DisplacementFieldTransform( const Self & ); // purposely not implemented
  void operator=( const Self & );             // purposely not implemented

  virtual void ComputeJacobianWithRespectToPositionInternal(const IndexType & index, JacobianType & jacobian,
                                                            bool doInverseJacobian) const;

  virtual void VerifyFixedParametersInformation();

  virtual void SetFixedParametersFromDisplacementField() const;

};

} // end namespace itk

#if ITK_TEMPLATE_EXPLICIT
#include "Templates/itkDisplacementFieldTransform+-.h"
#endif

#if ITK_TEMPLATE_TXX
#include "itkDisplacementFieldTransform.hxx"
#endif

#endif // __itkDisplacementFieldTransform_h