itkNormalizedGradientCorrelationImageToImageMetric.h

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 *  Copyright UMC Utrecht and contributors
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 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
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 *  distributed under the License is distributed on an "AS IS" BASIS,
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 *  See the License for the specific language governing permissions and
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#ifndef __itkNormalizedGradientCorrelationImageToImageMetric_h
#define __itkNormalizedGradientCorrelationImageToImageMetric_h
 
#include "itkAdvancedImageToImageMetric.h"
#include "itkSobelOperator.h"
#include "itkNeighborhoodOperatorImageFilter.h"
#include "itkPoint.h"
#include "itkCastImageFilter.h"
#include "itkResampleImageFilter.h"
#include "itkOptimizer.h"
#include "itkAdvancedCombinationTransform.h"
#include "itkAdvancedRayCastInterpolateImageFunction.h"
 
namespace itk
{
 
template< class TFixedImage, class TMovingImage >
class NormalizedGradientCorrelationImageToImageMetric :
  public AdvancedImageToImageMetric< TFixedImage, TMovingImage >
{
public:
 
  typedef NormalizedGradientCorrelationImageToImageMetric         Self;
  typedef AdvancedImageToImageMetric< TFixedImage, TMovingImage > Superclass;
  typedef SmartPointer< Self >                                    Pointer;
  typedef SmartPointer< const Self >                              ConstPointer;
 
  itkNewMacro( Self );
 
  itkTypeMacro( NormalizedGradientCorrelationImageToImageMetric, AdvancedImageToImageMetric );
 
  #if defined( _MSC_VER ) && ( _MSC_VER == 1300 )
  typedef double RealType;
  #else
  typedef typename Superclass::RealType RealType;
  #endif
 
  typedef typename Superclass::TransformType           TransformType;
  typedef typename TransformType::ScalarType           ScalarType;
  typedef typename Superclass::TransformPointer        TransformPointer;
  typedef typename TransformType::ConstPointer         TransformConstPointer;
  typedef typename Superclass::TransformParametersType TransformParametersType;
  typedef typename Superclass::TransformJacobianType   TransformJacobianType;
  typedef typename Superclass::InterpolatorType        InterpolatorType;
  typedef typename InterpolatorType::Pointer           InterpolatorPointer;
  typedef typename Superclass::MeasureType             MeasureType;
  typedef typename Superclass::DerivativeType          DerivativeType;
  typedef typename Superclass::FixedImageType          FixedImageType;
  typedef typename Superclass::FixedImageRegionType    FixedImageRegionType;
  typedef typename Superclass::MovingImageType         MovingImageType;
  typedef typename Superclass::MovingImageRegionType   MovingImageRegionType;
  typedef typename Superclass::FixedImageConstPointer  FixedImageConstPointer;
  typedef typename Superclass::MovingImageConstPointer MovingImageConstPointer;
  typedef typename Superclass::MovingImagePointer      MovingImagePointer;
  typedef typename TFixedImage::PixelType              FixedImagePixelType;
  typedef typename TMovingImage::PixelType             MovedImagePixelType;
  typedef typename itk::Optimizer                      OptimizerType;
  typedef typename OptimizerType::ScalesType           ScalesType;
 
  itkStaticConstMacro( FixedImageDimension, unsigned int, TFixedImage::ImageDimension );
 
  typedef typename itk::AdvancedCombinationTransform<
    ScalarType, FixedImageDimension >                    CombinationTransformType;
  typedef typename CombinationTransformType::Pointer CombinationTransformPointer;
  typedef itk::Image< FixedImagePixelType,
    itkGetStaticConstMacro( FixedImageDimension ) >   TransformedMovingImageType;
  typedef itk::Image< unsigned char,
    itkGetStaticConstMacro( FixedImageDimension ) >   MaskImageType;
  typedef typename MaskImageType::Pointer MaskImageTypePointer;
  typedef itk::ResampleImageFilter<
    MovingImageType, TransformedMovingImageType >       TransformMovingImageFilterType;
  typedef typename TransformMovingImageFilterType::Pointer TransformMovingImageFilterPointer;
  typedef typename itk::AdvancedRayCastInterpolateImageFunction
    < MovingImageType, ScalarType >                     RayCastInterpolatorType;
  typedef typename RayCastInterpolatorType::Pointer RayCastInterpolatorPointer;
 
  typedef itk::Image< RealType,
    itkGetStaticConstMacro( FixedImageDimension ) >       FixedGradientImageType;
  typedef itk::CastImageFilter< FixedImageType,
    FixedGradientImageType >                              CastFixedImageFilterType;
  typedef typename CastFixedImageFilterType::Pointer CastFixedImageFilterPointer;
  typedef typename FixedGradientImageType::PixelType FixedGradientPixelType;
 
  itkStaticConstMacro( MovedImageDimension, unsigned int, MovingImageType::ImageDimension );
  typedef itk::Image< RealType,
    itkGetStaticConstMacro( MovedImageDimension ) >       MovedGradientImageType;
  typedef itk::CastImageFilter< TransformedMovingImageType,
    MovedGradientImageType >                              CastMovedImageFilterType;
  typedef typename CastMovedImageFilterType::Pointer CastMovedImageFilterPointer;
  typedef typename MovedGradientImageType::PixelType MovedGradientPixelType;
 
  void GetDerivative( const TransformParametersType & parameters,
    DerivativeType  & derivative ) const override;
 
  MeasureType GetValue( const TransformParametersType & parameters ) const override;
 
  void GetValueAndDerivative( const TransformParametersType & parameters,
    MeasureType & Value, DerivativeType & derivative ) const override;
 
  void Initialize( void ) override;
 
  void WriteGradientImagesToFiles( void ) const;
 
  itkSetMacro( Scales, ScalesType );
  itkGetConstReferenceMacro( Scales, ScalesType );
 
  itkSetMacro( DerivativeDelta, double );
  itkGetConstReferenceMacro( DerivativeDelta, double );
 
  void SetTransformParameters( const TransformParametersType & parameters ) const;
 
protected:
 
  NormalizedGradientCorrelationImageToImageMetric();
  ~NormalizedGradientCorrelationImageToImageMetric() override {}
  void PrintSelf( std::ostream & os, Indent indent ) const override;
 
  void ComputeMeanMovedGradient( void ) const;
 
  void ComputeMeanFixedGradient( void ) const;
 
  MeasureType ComputeMeasure( const TransformParametersType & parameters ) const;
 
  typedef NeighborhoodOperatorImageFilter<
    FixedGradientImageType, FixedGradientImageType >        FixedSobelFilter;
  typedef NeighborhoodOperatorImageFilter<
    MovedGradientImageType, MovedGradientImageType >        MovedSobelFilter;
 
private:
 
  NormalizedGradientCorrelationImageToImageMetric( const Self & ); // purposely not implemented
  void operator=( const Self & );                                  // purposely not implemented
 
  ScalesType                  m_Scales;
  double                      m_DerivativeDelta;
  CombinationTransformPointer m_CombinationTransform;
 
  mutable MovedGradientPixelType m_MeanMovedGradient[ MovedImageDimension ];
 
  mutable FixedGradientPixelType m_MeanFixedGradient[ FixedImageDimension ];
 
  TransformMovingImageFilterPointer m_TransformMovingImageFilter;
 
  CastFixedImageFilterPointer m_CastFixedImageFilter;
 
  SobelOperator< FixedGradientPixelType,
  itkGetStaticConstMacro( FixedImageDimension ) >
  m_FixedSobelOperators[ FixedImageDimension ];
 
  typename FixedSobelFilter::Pointer m_FixedSobelFilters
  [ itkGetStaticConstMacro( FixedImageDimension ) ];
 
  ZeroFluxNeumannBoundaryCondition< MovedGradientImageType > m_MovedBoundCond;
  ZeroFluxNeumannBoundaryCondition< FixedGradientImageType > m_FixedBoundCond;
 
  CastMovedImageFilterPointer m_CastMovedImageFilter;
  SobelOperator< MovedGradientPixelType,
  itkGetStaticConstMacro( MovedImageDimension ) >
  m_MovedSobelOperators[ MovedImageDimension ];
 
  typename MovedSobelFilter::Pointer m_MovedSobelFilters[
    itkGetStaticConstMacro( MovedImageDimension ) ];
 
};
 
} // end namespace itk
 
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkNormalizedGradientCorrelationImageToImageMetric.hxx"
#endif
 
#endif