/* -*- mode: c++ -*-
*/
/*
GIFT, a flexible content based image retrieval system.
Copyright (C) 1998, 1999, 2000 CUI, University of Geneva
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _CSQUASHER
#define _CSQUASHER
#include <functional>
//
// in general for squashing: for the case that
// FARTHER much farther away than CLOSER
// the probability is supposed to be one
//
//the base
class CSquasher:public unary_function<double,double>{
protected:
double mSigma;
public:
///the real squashing function
virtual double operator()(double inCloser,
double inFarther)const=0;
///setting a parameter how much to believe the user
inline void setSigma(double inSigma){
mSigma=inSigma;
}
};
class CStandardSquasher:public CSquasher{
public:
///
virtual double operator()(double inCloser,
double inFarther)const;
};
class CDiscreteSquasher:public CSquasher{
public:
virtual double operator()(double inCloser,
double inFarther)const;
};
class CGaussianSquasher:public CSquasher{
public:
virtual double operator()(double inCloser,
double inFarther)const;
};
class CFlexibleSquasher:public CSquasher{
public:
virtual double operator()(double inCloser,
double inFarther)const;
};
#endif
Documentation generated by muellerw@pc7170 on Son Okt 8 16:04:40 CEST 2000