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CWFClassicalIDF.h

00001 /* -*- mode: c++ -*- 
00002 */
00003 /* 
00004 
00005     GIFT, a flexible content based image retrieval system.
00006     Copyright (C) 1998, 1999, 2000, 2001, 2002, CUI University of Geneva
00007 
00008     This program is free software; you can redistribute it and/or modify
00009     it under the terms of the GNU General Public License as published by
00010     the Free Software Foundation; either version 2 of the License, or
00011     (at your option) any later version.
00012 
00013     This program is distributed in the hope that it will be useful,
00014     but WITHOUT ANY WARRANTY; without even the implied warranty of
00015     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00016     GNU General Public License for more details.
00017 
00018     You should have received a copy of the GNU General Public License
00019     along with this program; if not, write to the Free Software
00020     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00021 
00022 */
00023 /***************************************
00024 *
00025 * 
00026 *
00027 ****************************************
00028 *
00029 * modification history:
00030 *
00031 * HM 090399 created the documentation
00032 *
00033 ****************************************
00034 *
00035 * compiler defines used:
00036 *
00037 *
00038 ****************************************/
00039 #ifndef _CWFCLASSICALIDF
00040 #define _CWFCLASSICALIDF
00041 #include "libGIFTQuInvertedFile/include/uses-declarations.h"
00042 #include "libGIFTQuInvertedFile/include/CWeightingFunction.h"
00043 
00045 class CWFClassicalIDF:public CWeightingFunction{
00046 protected:
00047 
00048 public: 
00049 /***************************************
00050 *
00051 * 
00052 *
00053 ***************************************/
00055 CWFClassicalIDF(const CAcInvertedFile* inAccessor=0,
00056                 CQueryNormalizer* inQueryNormalizer=0,
00057                 CQueryNormalizer* inThisNormalizer=0);
00058 
00059 /***************************************
00060 *
00061 * 
00062 *
00063 ***************************************/
00065   void preCalculate(); 
00066 
00067 /***************************************
00068 *
00069 * 
00070 *
00071 ***************************************/
00073   virtual double subApply(const double inDocumentFrequency,
00074                           const double inNormalizingFactor)const;
00075 
00076 /***************************************
00077 *
00078 * 
00079 *
00080 ***************************************/
00082   CWeightingFunction* clone()const;
00083 
00084 };
00085 
00086 #endif

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