/usr/include/InsightToolkit/Algorithms/itkMeanReciprocalSquareDifferencePointSetToImageMetric.h is in libinsighttoolkit3-dev 3.20.1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 | /*=========================================================================
  Program:   Insight Segmentation & Registration Toolkit
  Module:    itkMeanReciprocalSquareDifferencePointSetToImageMetric.h
  Language:  C++
  Date:      $Date$
  Version:   $Revision$
  Copyright (c) Insight Software Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
     This software is distributed WITHOUT ANY WARRANTY; without even 
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR 
     PURPOSE.  See the above copyright notices for more information.
=========================================================================*/
#ifndef __itkMeanReciprocalSquareDifferencePointSetToImageMetric_h
#define __itkMeanReciprocalSquareDifferencePointSetToImageMetric_h
#include "itkPointSetToImageMetric.h"
#include "itkCovariantVector.h"
#include "itkPoint.h"
namespace itk
{
  
/** \class MeanReciprocalSquareDifferencePointSetToImageMetric
 * \brief Computes similarity between pixel values of a point set and
 * intensity values in an image.
 *
 * This metric computes the average squared difference between pixels in
 * the point set and transformed point set pixels in the moving image 
 * after passing the difference through a function of type 
 * \f$ \frac{1}{1+ \frac{ difference^2 }{ \lambda^2 } }\f$.
 * $\lambda$ controls the capture radius of the metric. The term capture 
 * radius used here is in terms of intensity domain and not in the spatial 
 * domain.
 *
 * Spatial correspondance between both images is established through a 
 * Transform. 
 *
 * \ingroup RegistrationMetrics
 */
template < class TFixedPointSet, class TMovingImage > 
class ITK_EXPORT MeanReciprocalSquareDifferencePointSetToImageMetric : 
    public PointSetToImageMetric< TFixedPointSet, TMovingImage>
{
public:
  /** Standard class typedefs. */
  typedef  MeanReciprocalSquareDifferencePointSetToImageMetric  Self;
  typedef PointSetToImageMetric<TFixedPointSet, TMovingImage >  Superclass;
  typedef SmartPointer<Self>                                    Pointer;
  typedef SmartPointer<const Self>                              ConstPointer;
  /** Method for creation through the object factory. */
  itkNewMacro(Self);
 
  /** Run-time type information (and related methods). */
  itkTypeMacro( MeanReciprocalSquareDifferencePointSetToImageMetric, Object);
 
  /** Types transferred from the base class */
  typedef typename Superclass::RealType                   RealType;
  typedef typename Superclass::TransformType              TransformType;
  typedef typename Superclass::TransformPointer           TransformPointer;
  typedef typename Superclass::TransformParametersType    TransformParametersType;
  typedef typename Superclass::TransformJacobianType      TransformJacobianType;
  typedef typename Superclass::InputPointType             InputPointType;
  typedef typename Superclass::OutputPointType            OutputPointType;
  typedef typename Superclass::GradientPixelType          GradientPixelType;
  typedef typename Superclass::MeasureType                MeasureType;
  typedef typename Superclass::DerivativeType             DerivativeType;
  typedef typename Superclass::FixedPointSetType          FixedPointSetType;
  typedef typename Superclass::MovingImageType            MovingImageType;
  typedef typename Superclass::FixedPointSetConstPointer  FixedPointSetConstPointer;
  typedef typename Superclass::MovingImageConstPointer    MovingImageConstPointer;
  typedef typename Superclass::PointIterator              PointIterator;
  typedef typename Superclass::PointDataIterator          PointDataIterator;
  /** Get the derivatives of the match measure. */
  void GetDerivative( const TransformParametersType & parameters,
                      DerivativeType & Derivative ) const;
  /**  Get the value for single valued optimizers. */
  MeasureType GetValue( const TransformParametersType & parameters ) const;
  /**  Get value and derivatives for multiple valued optimizers. */
  void GetValueAndDerivative( const TransformParametersType & parameters,
                              MeasureType& Value, DerivativeType& Derivative ) const;
  /**  Set/Get the lambda distance. (controls the capture radius of the metric).  */
  itkSetMacro( Lambda, double );
  itkGetConstMacro( Lambda, double );
 
protected:
  MeanReciprocalSquareDifferencePointSetToImageMetric();
  virtual ~MeanReciprocalSquareDifferencePointSetToImageMetric() {};
  virtual void PrintSelf(std::ostream& os, Indent indent) const;
  
private:
  MeanReciprocalSquareDifferencePointSetToImageMetric(const Self&); //purposely not implemented
  void operator=(const Self&); //purposely not implemented
  
  double          m_Lambda;
    
};
} // end namespace itk
#ifndef ITK_MANUAL_INSTANTIATION
#include "itkMeanReciprocalSquareDifferencePointSetToImageMetric.txx"
#endif
#endif
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