PolyMatchWordKernel.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 _POLYMATCHWORDKERNEL_H___
00012 #define _POLYMATCHWORDKERNEL_H___
00013 
00014 #include "lib/common.h"
00015 #include "kernel/SimpleKernel.h"
00016 #include "features/WordFeatures.h"
00017 
00019 class CPolyMatchWordKernel: public CSimpleKernel<WORD>
00020 {
00021     public:
00029         CPolyMatchWordKernel(INT size, INT degree, bool inhomogene,
00030             bool use_normalization=true);
00031 
00040         CPolyMatchWordKernel(CWordFeatures* l, CWordFeatures* r,
00041             INT degree, bool inhomogene, bool use_normalization=true);
00042 
00043         virtual ~CPolyMatchWordKernel();
00044 
00051         virtual bool init(CFeatures* l, CFeatures* r);
00052 
00054         virtual void cleanup();
00055 
00061         virtual bool load_init(FILE* src);
00062 
00068         virtual bool save_init(FILE* dest);
00069 
00074         virtual EKernelType get_kernel_type() { return K_POLYMATCH; }
00075 
00080         virtual const CHAR* get_name() { return "PolyMatchWord"; }
00081 
00082     protected:
00091         virtual DREAL compute(INT idx_a, INT idx_b);
00092 
00093     protected:
00095         INT degree;
00097         bool inhomogene;
00099         bool use_normalization;
00100 
00102         DREAL *sqrtdiag_lhs;
00104         DREAL *sqrtdiag_rhs;
00106         bool initialized;
00107 };
00108 
00109 #endif /* _POLYMATCHWORDKERNEL_H__ */

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