itkVelocityFieldTransform.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 __itkVelocityFieldTransform_h
#define __itkVelocityFieldTransform_h

#include "itkDisplacementFieldTransform.h"

namespace itk
{

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

  itkTypeMacro( VelocityFieldTransform, DisplacementFieldTransform );

  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::TransformCategoryType TransformCategoryType;

  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::DerivativeType DerivativeType;

  itkStaticConstMacro( VelocityFieldDimension, unsigned int, NDimensions + 1 );

  itkStaticConstMacro( Dimension, unsigned int, NDimensions );

  typedef typename Superclass::DisplacementFieldType   DisplacementFieldType;
  typedef typename DisplacementFieldType::Pointer      DisplacementFieldPointer;

  typedef Image<OutputVectorType, VelocityFieldDimension>       VelocityFieldType;
  typedef typename VelocityFieldType::Pointer                   VelocityFieldPointer;

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

  typedef VectorInterpolateImageFunction<VelocityFieldType, ScalarType> VelocityFieldInterpolatorType;
  typedef typename VelocityFieldInterpolatorType::Pointer               VelocityFieldInterpolatorPointer;

  typedef ImageVectorOptimizerParametersHelper<ScalarType, Dimension, VelocityFieldDimension>
    OptimizerParametersHelperType;

  itkGetObjectMacro( VelocityField, VelocityFieldType );

  virtual void SetVelocityField( VelocityFieldType * );

  virtual void SetFixedParameters( const ParametersType & );

  itkGetObjectMacro( VelocityFieldInterpolator, VelocityFieldInterpolatorType );
  /* Create out own set accessor that assigns the velocity field */
  virtual void SetVelocityFieldInterpolator( VelocityFieldInterpolatorType * );

  itkGetConstReferenceMacro( VelocityFieldSetTime, unsigned long );

  itkSetObjectMacro( DisplacementField, DisplacementFieldType );

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

  bool GetInverse( Self *inverse ) const;

  virtual InverseTransformBasePointer GetInverseTransform() const;

  virtual void IntegrateVelocityField() {};

  itkSetClampMacro( LowerTimeBound, ScalarType, 0.0, 1.0 );

  itkGetConstMacro( LowerTimeBound, ScalarType );

  itkSetClampMacro( UpperTimeBound, ScalarType, 0.0, 1.0 );

  itkGetConstMacro( UpperTimeBound, ScalarType );

  itkSetMacro( NumberOfIntegrationSteps, unsigned int );

  itkGetConstMacro( NumberOfIntegrationSteps, unsigned int );

protected:

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

  virtual typename LightObject::Pointer InternalClone() const;

  typename DisplacementFieldType::Pointer CopyDisplacementField( const DisplacementFieldType * ) const;

  ScalarType                                m_LowerTimeBound;
  ScalarType                                m_UpperTimeBound;

  unsigned int                              m_NumberOfIntegrationSteps;

  VelocityFieldPointer                      m_VelocityField;

  typename VelocityFieldInterpolatorType::Pointer          m_VelocityFieldInterpolator;

  unsigned long m_VelocityFieldSetTime;

private:
  VelocityFieldTransform( const Self & ); // purposely not implemented
  void operator=( const Self & );             // purposely not implemented

  virtual void SetFixedParametersFromVelocityField() const;

};
} // end namespace itk

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

#endif // __itkVelocityFieldTransform_h