itkDiffeomorphicDemonsRegistrationFilter.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 __itkDiffeomorphicDemonsRegistrationFilter_h
#define __itkDiffeomorphicDemonsRegistrationFilter_h

#include "itkPDEDeformableRegistrationFilter.h"
#include "itkESMDemonsRegistrationFunction.h"

#include "itkMultiplyImageFilter.h"
#include "itkExponentialDisplacementFieldImageFilter.h"

namespace itk
{
template< typename TFixedImage, typename TMovingImage, typename TDisplacementField >
class DiffeomorphicDemonsRegistrationFilter:
  public PDEDeformableRegistrationFilter< TFixedImage, TMovingImage,
                                          TDisplacementField >
{
public:
  typedef DiffeomorphicDemonsRegistrationFilter                                           Self;
  typedef PDEDeformableRegistrationFilter< TFixedImage, TMovingImage, TDisplacementField > Superclass;
  typedef SmartPointer< Self >                                                            Pointer;
  typedef SmartPointer< const Self >                                                      ConstPointer;

  itkNewMacro(Self);

  itkTypeMacro(DiffeomorphicDemonsRegistrationFilter, PDEDeformableRegistrationFilter);

  typedef typename Superclass::FixedImageType    FixedImageType;
  typedef typename Superclass::FixedImagePointer FixedImagePointer;

  typedef typename Superclass::MovingImageType    MovingImageType;
  typedef typename Superclass::MovingImagePointer MovingImagePointer;

  typedef typename Superclass::DisplacementFieldType    DisplacementFieldType;
  typedef typename Superclass::DisplacementFieldPointer DisplacementFieldPointer;
#ifdef ITKV3_COMPATIBILITY
  typedef typename Superclass::DeformationFieldType    DeformationFieldType;
  typedef typename Superclass::DeformationFieldPointer DeformationFieldPointer;
#endif

  typedef typename Superclass::FiniteDifferenceFunctionType FiniteDifferenceFunctionType;

  typedef typename FiniteDifferenceFunctionType::TimeStepType TimeStepType;

  typedef ESMDemonsRegistrationFunction< FixedImageType, MovingImageType,
                                         DisplacementFieldType > DemonsRegistrationFunctionType;
  typedef typename DemonsRegistrationFunctionType::GradientType GradientType;

  itkStaticConstMacro(
    ImageDimension, unsigned int, FixedImageType::ImageDimension);

  virtual double GetMetric() const;

  virtual const double & GetRMSChange() const;

  virtual void SetUseGradientType(GradientType gtype);

  virtual GradientType GetUseGradientType() const;

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

  virtual void SetIntensityDifferenceThreshold(double);

  virtual double GetIntensityDifferenceThreshold() const;

  virtual void SetMaximumUpdateStepLength(double);

  virtual double GetMaximumUpdateStepLength() const;

protected:
  DiffeomorphicDemonsRegistrationFilter();
  ~DiffeomorphicDemonsRegistrationFilter() {}
  void PrintSelf(std::ostream & os, Indent indent) const;

  virtual void InitializeIteration();

  virtual void AllocateUpdateBuffer();

  virtual void ApplyUpdate(const TimeStepType& dt);

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

  // implemented

  DemonsRegistrationFunctionType *  DownCastDifferenceFunctionType();

  const DemonsRegistrationFunctionType *  DownCastDifferenceFunctionType() const;

  typedef MultiplyImageFilter< DisplacementFieldType,
    itk::Image<TimeStepType, ImageDimension>,
    DisplacementFieldType >                              MultiplyByConstantType;

  typedef ExponentialDisplacementFieldImageFilter<
    DisplacementFieldType, DisplacementFieldType >        FieldExponentiatorType;

  typedef WarpVectorImageFilter<
    DisplacementFieldType,
    DisplacementFieldType, DisplacementFieldType >        VectorWarperType;

  typedef VectorLinearInterpolateNearestNeighborExtrapolateImageFunction<
    DisplacementFieldType, double >                      FieldInterpolatorType;

  typedef AddImageFilter<
    DisplacementFieldType,
    DisplacementFieldType, DisplacementFieldType >        AdderType;

  typedef typename MultiplyByConstantType::Pointer   MultiplyByConstantPointer;
  typedef typename FieldExponentiatorType::Pointer   FieldExponentiatorPointer;
  typedef typename VectorWarperType::Pointer         VectorWarperPointer;
  typedef typename FieldInterpolatorType::Pointer    FieldInterpolatorPointer;
  typedef typename FieldInterpolatorType::OutputType FieldInterpolatorOutputType;
  typedef typename AdderType::Pointer                AdderPointer;

  MultiplyByConstantPointer m_Multiplier;
  FieldExponentiatorPointer m_Exponentiator;
  VectorWarperPointer       m_Warper;
  AdderPointer              m_Adder;
  bool                      m_UseFirstOrderExp;
};
} // end namespace itk

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

#endif