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// -*- mode: c++ -*-
/*
GIFT, a flexible content based image retrieval system.
Copyright (C) 1998, 1999, 2000, 2001, 2002, CUI University of Geneva
Copyright (C) 2003, 2004 Bayreuth University
2005 Bamberg University
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
*/
/***************************************
*
* CWFBinaryTerm
*
****************************************
*
* modification history:
*
* HM 090399 created the documentation
*
****************************************
*
* compiler defines used:
*
*
****************************************/
#include "libGIFTQuInvertedFile/include/CWFBinaryTerm.h"
#include <cmath>
#include "FeatureExtraction/gift_features.h"
/***************************************
*
* Constructor
*
****************************************
*
* modification history
*
*
*
****************************************/
CWFBinaryTerm::
CWFBinaryTerm(const CAcInvertedFile* inAccessor,
CQueryNormalizer* inQueryNormalizer,
CQueryNormalizer* inThisNormalizer):
CWeightingFunction(inAccessor,
inQueryNormalizer,
inThisNormalizer)
{
}
/***************************************
*
* subApply
*
****************************************
*
* modification history
*
*
*
****************************************/
double CWFBinaryTerm::subApply(const double inDocumentFrequency,
const double inNormalizationFactor)const{
#ifdef PRINT
cout << "CWFBinaryTerm" <<endl;
#endif
TID lFeatureID=mID;
double lCollectionFrequency=
mAccessor->FeatureToCollectionFrequency(lFeatureID);
if((mFeatureDescription==COL_HST)
||
(mFeatureDescription==GABOR_HST)){
return CWeightingFunction::subApply(inDocumentFrequency,
inNormalizationFactor);
}else{
return
CWeightingFunction::subApply(inDocumentFrequency,
inNormalizationFactor)
*
log(1/lCollectionFrequency-0.9999);
}
}
/***************************************
*
* clone
*
****************************************
*
* modification history
*
*
*
****************************************/
///
CWeightingFunction* CWFBinaryTerm::clone()const{
CWeightingFunction* lRetVal=new CWFBinaryTerm(mAccessor,
mQueryNormalizer,
mThisNormalizer);
return lRetVal;
};
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