itkImageRegistrationMethodv4.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 itkImageRegistrationMethodv4_h
#define itkImageRegistrationMethodv4_h

#include "itkProcessObject.h"

#include "itkCompositeTransform.h"
#include "itkDataObjectDecorator.h"
#include "itkObjectToObjectMetricBase.h"
#include "itkObjectToObjectMultiMetricv4.h"
#include "itkObjectToObjectOptimizerBase.h"
#include "itkImageToImageMetricv4.h"
#include "itkPointSetToPointSetMetricv4.h"
#include "itkShrinkImageFilter.h"
#include "itkTransform.h"
#include "itkTransformParametersAdaptorBase.h"

#include <vector>

namespace itk
{

template<typename TFixedImage,
         typename TMovingImage,
         typename TOutputTransform = Transform<double, TFixedImage::ImageDimension, TFixedImage::ImageDimension>,
         typename TVirtualImage = TFixedImage,
         typename TPointSet = PointSet<unsigned int, TFixedImage::ImageDimension> >
class ImageRegistrationMethodv4
:public ProcessObject
{
public:
  typedef ImageRegistrationMethodv4                 Self;
  typedef ProcessObject                             Superclass;
  typedef SmartPointer<Self>                        Pointer;
  typedef SmartPointer<const Self>                  ConstPointer;

  itkNewMacro( Self );

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

  itkTypeMacro( ImageRegistrationMethodv4, ProcessObject );

  typedef TFixedImage                                                 FixedImageType;
  typedef typename FixedImageType::Pointer                            FixedImagePointer;
  typedef std::vector<FixedImagePointer>                              FixedImagesContainerType;
  typedef TMovingImage                                                MovingImageType;
  typedef typename MovingImageType::Pointer                           MovingImagePointer;
  typedef std::vector<MovingImagePointer>                             MovingImagesContainerType;

  typedef TPointSet                                                   PointSetType;
  typedef typename PointSetType::ConstPointer                         PointSetConstPointer;
  typedef std::vector<PointSetConstPointer>                           PointSetsContainerType;

  typedef TOutputTransform                                            OutputTransformType;
  typedef typename OutputTransformType::Pointer                       OutputTransformPointer;
  typedef typename OutputTransformType::ScalarType                    RealType;
  typedef typename OutputTransformType::DerivativeType                DerivativeType;
  typedef typename DerivativeType::ValueType                          DerivativeValueType;

  typedef Transform<RealType, ImageDimension, ImageDimension>         InitialTransformType;
  typedef typename InitialTransformType::Pointer                      InitialTransformPointer;

  typedef CompositeTransform<RealType, ImageDimension>                CompositeTransformType;
  typedef typename CompositeTransformType::Pointer                    CompositeTransformPointer;

  typedef ObjectToObjectMetricBaseTemplate<RealType>                  MetricType;
  typedef typename MetricType::Pointer                                MetricPointer;

  typedef Vector<RealType, ImageDimension>                            VectorType;

  typedef TVirtualImage                                               VirtualImageType;
  typedef typename VirtualImageType::Pointer                          VirtualImagePointer;
  typedef ImageBase<ImageDimension>                                   VirtualImageBaseType;
  typedef typename VirtualImageBaseType::ConstPointer                 VirtualImageBaseConstPointer;

  typedef ObjectToObjectMultiMetricv4<ImageDimension, ImageDimension, VirtualImageType, RealType>  MultiMetricType;
  typedef ImageToImageMetricv4<FixedImageType, MovingImageType, VirtualImageType, RealType>        ImageMetricType;
  typedef PointSetToPointSetMetricv4<PointSetType, PointSetType, RealType>                         PointSetMetricType;

  typedef DataObjectDecorator<OutputTransformType>                    DecoratedOutputTransformType;
  typedef typename DecoratedOutputTransformType::Pointer              DecoratedOutputTransformPointer;
  typedef DataObjectDecorator<InitialTransformType>                   DecoratedInitialTransformType;
  typedef typename DecoratedInitialTransformType::Pointer             DecoratedInitialTransformPointer;

  typedef ShrinkImageFilter<FixedImageType, VirtualImageType>         ShrinkFilterType;
  typedef typename ShrinkFilterType::ShrinkFactorsType                ShrinkFactorsPerDimensionContainerType;

  typedef Array<SizeValueType>                                        ShrinkFactorsArrayType;

  typedef Array<RealType>                                             SmoothingSigmasArrayType;
  typedef Array<RealType>                                             MetricSamplingPercentageArrayType;

  typedef TransformParametersAdaptorBase<InitialTransformType>        TransformParametersAdaptorType;
  typedef typename TransformParametersAdaptorType::Pointer            TransformParametersAdaptorPointer;
  typedef std::vector<TransformParametersAdaptorPointer>              TransformParametersAdaptorsContainerType;

  typedef ObjectToObjectOptimizerBaseTemplate<RealType>               OptimizerType;
  typedef typename OptimizerType::Pointer                             OptimizerPointer;

  typedef typename OptimizerType::ScalesType                          OptimizerWeightsType;

  enum MetricSamplingStrategyType { NONE, REGULAR, RANDOM };

  typedef typename ImageMetricType::FixedSampledPointSetType          MetricSamplePointSetType;

  virtual void SetFixedImage( const FixedImageType *image )
    {
    this->SetFixedImage( 0, image );
    }
  virtual const FixedImageType * GetFixedImage() const
    {
    return this->GetFixedImage( 0 );
    }
  virtual void SetFixedImage( SizeValueType, const FixedImageType * );
  virtual const FixedImageType * GetFixedImage( SizeValueType ) const;

  virtual void SetMovingImage( const MovingImageType *image )
    {
    this->SetMovingImage( 0, image );
    }
  virtual const MovingImageType * GetMovingImage() const
    {
    return this->GetMovingImage( 0 );
    }
  virtual void SetMovingImage( SizeValueType, const MovingImageType * );
  virtual const MovingImageType * GetMovingImage( SizeValueType ) const;

  virtual void SetFixedPointSet( const PointSetType *pointSet )
    {
    this->SetFixedPointSet( 0, pointSet );
    }
  virtual const PointSetType * GetFixedPointSet() const
    {
    return this->GetFixedPointSet( 0 );
    }
  virtual void SetFixedPointSet( SizeValueType, const PointSetType * );
  virtual const PointSetType * GetFixedPointSet( SizeValueType ) const;

  virtual void SetMovingPointSet( const PointSetType *pointSet )
    {
    this->SetMovingPointSet( 0, pointSet );
    }
  virtual const PointSetType * GetMovingPointSet() const
    {
    return this->GetMovingPointSet( 0 );
    }
  virtual void SetMovingPointSet( SizeValueType, const PointSetType * );
  virtual const PointSetType * GetMovingPointSet( SizeValueType ) const;

  itkSetObjectMacro( Optimizer, OptimizerType );
  itkGetModifiableObjectMacro( Optimizer, OptimizerType );

  void SetOptimizerWeights( OptimizerWeightsType & );
  itkGetConstMacro( OptimizerWeights, OptimizerWeightsType );

  itkSetObjectMacro( Metric, MetricType );
  itkGetModifiableObjectMacro( Metric, MetricType );

  itkSetMacro( MetricSamplingStrategy, MetricSamplingStrategyType );
  itkGetConstMacro( MetricSamplingStrategy, MetricSamplingStrategyType );

  void SetMetricSamplingPercentage( const RealType );

  itkSetMacro( MetricSamplingPercentagePerLevel, MetricSamplingPercentageArrayType );
  itkGetConstMacro( MetricSamplingPercentagePerLevel, MetricSamplingPercentageArrayType );

  itkSetGetDecoratedObjectInputMacro( FixedInitialTransform, InitialTransformType );

  itkSetGetDecoratedObjectInputMacro( MovingInitialTransform, InitialTransformType );

  itkSetGetDecoratedObjectInputMacro(InitialTransform, InitialTransformType);

  void SetTransformParametersAdaptorsPerLevel( TransformParametersAdaptorsContainerType & );
  const TransformParametersAdaptorsContainerType & GetTransformParametersAdaptorsPerLevel() const;

  void SetNumberOfLevels( const SizeValueType );
  itkGetConstMacro( NumberOfLevels, SizeValueType );

  void SetShrinkFactorsPerLevel( ShrinkFactorsArrayType factors )
    {
    for( unsigned int level = 0; level < factors.Size(); ++level )
      {
      ShrinkFactorsPerDimensionContainerType shrinkFactors;
      shrinkFactors.Fill( factors[level] );
      this->SetShrinkFactorsPerDimension( level, shrinkFactors );
      }
    }

  ShrinkFactorsPerDimensionContainerType GetShrinkFactorsPerDimension( const unsigned int level ) const
    {
    if( level >= this->m_ShrinkFactorsPerLevel.size() )
      {
      itkExceptionMacro( "Requesting level greater than the number of levels." );
      }
    return this->m_ShrinkFactorsPerLevel[level];
    }

  void SetShrinkFactorsPerDimension( unsigned int level, ShrinkFactorsPerDimensionContainerType factors )
    {
    if( level >= this->m_ShrinkFactorsPerLevel.size() )
      {
      this->m_ShrinkFactorsPerLevel.resize( level + 1 );
      }
    this->m_ShrinkFactorsPerLevel[level] = factors;
    this->Modified();
    }

  itkSetMacro( SmoothingSigmasPerLevel, SmoothingSigmasArrayType );
  itkGetConstMacro( SmoothingSigmasPerLevel, SmoothingSigmasArrayType );

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

  typedef ProcessObject::DataObjectPointerArraySizeType DataObjectPointerArraySizeType;
  using Superclass::MakeOutput;
  virtual DataObjectPointer MakeOutput( DataObjectPointerArraySizeType ) ITK_OVERRIDE;

  virtual DecoratedOutputTransformType * GetOutput();
  virtual const DecoratedOutputTransformType * GetOutput() const;

  virtual DecoratedOutputTransformType * GetTransformOutput() { return this->GetOutput(); }
  virtual const DecoratedOutputTransformType * GetTransformOutput() const { return this->GetOutput(); }

  virtual OutputTransformType * GetModifiableTransform();
  virtual const OutputTransformType * GetTransform() const;

  itkGetConstMacro( CurrentLevel, SizeValueType );

  itkGetConstReferenceMacro( CurrentIteration, SizeValueType );

  /* Get the current metric value.  This is a helper function for reporting observations. */
  itkGetConstReferenceMacro( CurrentMetricValue, RealType );

  itkGetConstReferenceMacro( CurrentConvergenceValue, RealType );

  itkGetConstReferenceMacro( IsConverged, bool );

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

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

  void InitializeCenterOfLinearOutputTransform();

#ifdef ITKV3_COMPATIBILITY

  void StartRegistration(void) { this->Update(); }
#endif

protected:
  ImageRegistrationMethodv4();
  virtual ~ImageRegistrationMethodv4();
  virtual void PrintSelf( std::ostream & os, Indent indent ) const ITK_OVERRIDE;

  virtual void  GenerateData() ITK_OVERRIDE;

  virtual void AllocateOutputs();

  virtual void InitializeRegistrationAtEachLevel( const SizeValueType );

  virtual VirtualImageBaseConstPointer GetCurrentLevelVirtualDomainImage();

  virtual void SetMetricSamplePoints();

  SizeValueType                                                   m_CurrentLevel;
  SizeValueType                                                   m_NumberOfLevels;
  SizeValueType                                                   m_CurrentIteration;
  RealType                                                        m_CurrentMetricValue;
  RealType                                                        m_CurrentConvergenceValue;
  bool                                                            m_IsConverged;

  FixedImagesContainerType                                        m_FixedSmoothImages;
  MovingImagesContainerType                                       m_MovingSmoothImages;
  VirtualImagePointer                                             m_VirtualDomainImage;
  PointSetsContainerType                                          m_FixedPointSets;
  PointSetsContainerType                                          m_MovingPointSets;
  SizeValueType                                                   m_NumberOfFixedObjects;
  SizeValueType                                                   m_NumberOfMovingObjects;

  OptimizerPointer                                                m_Optimizer;
  OptimizerWeightsType                                            m_OptimizerWeights;
  bool                                                            m_OptimizerWeightsAreIdentity;

  MetricPointer                                                   m_Metric;
  MetricSamplingStrategyType                                      m_MetricSamplingStrategy;
  MetricSamplingPercentageArrayType                               m_MetricSamplingPercentagePerLevel;
  SizeValueType                                                   m_NumberOfMetrics;
  int                                                             m_FirstImageMetricIndex;
  std::vector<ShrinkFactorsPerDimensionContainerType>             m_ShrinkFactorsPerLevel;
  SmoothingSigmasArrayType                                        m_SmoothingSigmasPerLevel;
  bool                                                            m_SmoothingSigmasAreSpecifiedInPhysicalUnits;

  TransformParametersAdaptorsContainerType                        m_TransformParametersAdaptorsPerLevel;

  CompositeTransformPointer                                       m_CompositeTransform;

  //TODO: m_OutputTransform should be removed and replaced with a named input parameter for
  //      the pipeline
  OutputTransformPointer                                          m_OutputTransform;


private:
  ImageRegistrationMethodv4( const Self & );   //purposely not implemented
  void operator=( const Self & );              //purposely not implemented

  bool                                                            m_InPlace;

  bool                                                            m_InitializeCenterOfLinearOutputTransform;

  // helper function to create the right kind of concrete transform
  template<typename TTransform>
  static void MakeOutputTransform(SmartPointer<TTransform> &ptr)
    {
      ptr = TTransform::New();
    }

  static void MakeOutputTransform(SmartPointer<InitialTransformType> &ptr)
    {
      ptr = IdentityTransform<RealType, ImageDimension>::New().GetPointer();
    }

};
} // end namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkImageRegistrationMethodv4.hxx"
#endif

#endif