itkFastSymmetricForcesDemonsRegistrationFilter.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 __itkFastSymmetricForcesDemonsRegistrationFilter_h
#define __itkFastSymmetricForcesDemonsRegistrationFilter_h

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

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

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

  itkNewMacro(Self);

  itkTypeMacro(FastSymmetricForcesDemonsRegistrationFilter,
               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;

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

  virtual double GetMetric() const;

  virtual const double & GetRMSChange() const;

  typedef ESMDemonsRegistrationFunction<
    FixedImageType,
    MovingImageType, DisplacementFieldType >                DemonsRegistrationFunctionType;

  typedef typename DemonsRegistrationFunctionType::GradientType GradientType;
  virtual void SetUseGradientType(GradientType gtype);

  virtual GradientType GetUseGradientType() const;

  virtual void SetIntensityDifferenceThreshold(double);

  virtual double GetIntensityDifferenceThreshold() const;

  virtual void SetMaximumUpdateStepLength(double);

  virtual double GetMaximumUpdateStepLength() const;

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

  virtual void InitializeIteration();

  virtual void AllocateUpdateBuffer();

  typedef typename
  Superclass::FiniteDifferenceFunctionType FiniteDifferenceFunctionType;

  typedef typename
  FiniteDifferenceFunctionType::TimeStepType TimeStepType;

  virtual void ApplyUpdate(const TimeStepType& dt);

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

  typedef AddImageFilter<
    DisplacementFieldType,
    DisplacementFieldType, DisplacementFieldType >          AdderType;

  typedef typename MultiplyByConstantType::Pointer MultiplyByConstantPointer;
  typedef typename AdderType::Pointer              AdderPointer;
private:
  FastSymmetricForcesDemonsRegistrationFilter(const Self &); //purposely not
                                                             // implemented
  void operator=(const Self &);                              //purposely not

  // implemented

  DemonsRegistrationFunctionType *  DownCastDifferenceFunctionType();

  const DemonsRegistrationFunctionType *  DownCastDifferenceFunctionType() const;

  MultiplyByConstantPointer m_Multiplier;
  AdderPointer              m_Adder;
};
} // end namespace itk

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

#endif