Numerics/Statistics/itkDistanceMetric.h

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/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: itkDistanceMetric.h,v $
  Language:  C++
  Date:      $Date: 2010-02-02 13:45:16 $
  Version:   $Revision: 1.14 $

  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 __itkDistanceMetric_h
#define __itkDistanceMetric_h

#include "itkMembershipFunctionBase.h"
#include "itkArray.h"

namespace itk { 
namespace Statistics {

template< class TVector >
class ITK_EXPORT DistanceMetric : public MembershipFunctionBase< TVector >
{
public:
  typedef DistanceMetric                    Self;
  typedef MembershipFunctionBase< TVector > Superclass;
  typedef SmartPointer< Self >              Pointer;
  typedef SmartPointer<const Self>          ConstPointer;
  typedef typename Superclass::MeasurementVectorSizeType
                                             MeasurementVectorSizeType;

  itkTypeMacro(DistanceMetric, MembershipFunctionBase);

  typedef Array< double > OriginType;

  virtual void SetMeasurementVectorSize( const MeasurementVectorSizeType );

  void SetOrigin(const OriginType& x);
  itkGetConstReferenceMacro(Origin, OriginType);

  virtual double Evaluate(const TVector &x) const = 0;

  virtual double Evaluate(const TVector &x1, const TVector &x2) const = 0;

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

  OriginType m_Origin;
}; // end of class

} // end of namespace Statistics 
} // end of namespace itk

#ifndef ITK_MANUAL_INSTANTIATION
#include "itkDistanceMetric.txx"
#endif

#endif