WordMatchKernel.h

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00001 /*
00002  * This program is free software; you can redistribute it and/or modify
00003  * it under the terms of the GNU General Public License as published by
00004  * the Free Software Foundation; either version 3 of the License, or
00005  * (at your option) any later version.
00006  *
00007  * Written (W) 1999-2008 Soeren Sonnenburg
00008  * Copyright (C) 1999-2008 Fraunhofer Institute FIRST and Max-Planck-Society
00009  */
00010 
00011 #ifndef _WORDMATCHKERNEL_H___
00012 #define _WORDMATCHKERNEL_H___
00013 
00014 #include "lib/common.h"
00015 #include "kernel/SimpleKernel.h"
00016 #include "features/WordFeatures.h"
00017 
00019 class CWordMatchKernel: public CSimpleKernel<WORD>
00020 {
00021     public:
00029         CWordMatchKernel(INT size, INT d,
00030             bool do_rescale=true, DREAL scale=1.);
00031 
00040         CWordMatchKernel(CWordFeatures* l, CWordFeatures* r, INT degree,
00041             bool do_rescale=true, DREAL scale=1.);
00042 
00043         virtual ~CWordMatchKernel();
00044 
00051         virtual bool init(CFeatures* l, CFeatures* r);
00052 
00058         virtual bool load_init(FILE* src);
00059 
00065         virtual bool save_init(FILE* dest);
00066 
00071         virtual EKernelType get_kernel_type() { return K_LINEAR; }
00072 
00077         virtual const CHAR* get_name() { return "WordMatch"; }
00078 
00079     protected:
00088         virtual DREAL compute(INT idx_a, INT idx_b);
00089 
00091         virtual void init_rescale();
00092 
00093     protected:
00095         double scale;
00097         bool do_rescale;
00099         bool initialized;
00100 
00102         INT degree;
00103 };
00104 
00105 #endif /* _WORDMATCHKERNEL_H__ */

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