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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
*/
/***************************************
*
* CQUERYNORMALIZER
*
****************************************
*
* modification history:
*
* HM 090399 created the documentation
*
****************************************
*
* compiler defines used:
*
*
****************************************/
#ifndef _CQUERYNORMALIZER
#define _CQUERYNORMALIZER
#include "libGIFTQuInvertedFile/include/uses-declarations.h"
#include "libGIFTAcInvertedFile/include/CDocumentFrequencyElement.h"
#include "libGIFTQuInvertedFile/include/CWeightingFunction.h"
#include "libGIFTAcInvertedFile/include/CAcInvertedFile.h"
/** For normalizing weights like in Salton/Buckley we need to now all the
features in the query or all the features in a document. This base class is
supposed to handle both.
For getting additional information it needs to know the accessor.
*/
class CQueryNormalizer{
protected:
/***************************************
*
*
*
***************************************/
///
double mValue;
/***************************************
*
*
*
***************************************/
///
const CAcInvertedFile* mAccessor;
public:
/***************************************
*
*
*
***************************************/
///
CQueryNormalizer(const CAcInvertedFile* inAccessor=0);
/***************************************
*
*
*
***************************************/
///
void setAccessor(const CAcInvertedFile* inAccessor);
/***************************************
*
*
*
***************************************/
///
virtual void reset();
/***************************************
*
*
*
***************************************/
///Translating the information into a normalizing value in the end
virtual double getValue()const;
/***************************************
*
*
*
***************************************/
///Considers a feature
virtual void considerQueryFeature(const CWeightingFunction&
inFeature);
/***************************************
*
* returning a copy of this
*
***************************************/
virtual CQueryNormalizer* clone()const;
};
#endif
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