SVMOcas.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) 2007-2008 Vojtech Franc
00008  * Written (W) 2007-2008 Soeren Sonnenburg
00009  * Copyright (C) 2007-2008 Fraunhofer Institute FIRST and Max-Planck-Society
00010  */
00011 
00012 #ifndef _SVMOCAS_H___
00013 #define _SVMOCAS_H___
00014 
00015 #include "lib/common.h"
00016 #include "classifier/SparseLinearClassifier.h"
00017 #include "features/SparseFeatures.h"
00018 #include "features/Labels.h"
00019 
00020 enum E_SVM_TYPE
00021 {
00022     SVM_OCAS = 0,
00023     SVM_BMRM = 1
00024 };
00025 
00027 class CSVMOcas : public CSparseLinearClassifier
00028 {
00029     public:
00034         CSVMOcas(E_SVM_TYPE type);
00035 
00042         CSVMOcas(DREAL C, CSparseFeatures<DREAL>* traindat, CLabels* trainlab);
00043         virtual ~CSVMOcas();
00044 
00049         virtual inline EClassifierType get_classifier_type() { return CT_SVMOCAS; }
00050 
00055         virtual bool train();
00056 
00062         inline void set_C(DREAL c1, DREAL c2) { C1=c1; C2=c2; }
00063 
00068         inline DREAL get_C1() { return C1; }
00069 
00074         inline DREAL get_C2() { return C2; }
00075 
00080         inline void set_epsilon(DREAL eps) { epsilon=eps; }
00081 
00086         inline DREAL get_epsilon() { return epsilon; }
00087 
00092         inline void set_bias_enabled(bool enable_bias) { use_bias=enable_bias; }
00093 
00098         inline bool get_bias_enabled() { return use_bias; }
00099 
00104         inline void set_bufsize(INT sz) { bufsize=sz; }
00105 
00110         inline INT get_bufsize() { return bufsize; }
00111 
00112     protected:
00121         static void compute_W( double *sq_norm_W, double *dp_WoldW, double *alpha, uint32_t nSel, void* ptr );
00122 
00129         static double update_W(double t, void* ptr );
00130 
00139         static void add_new_cut( double *new_col_H, uint32_t *new_cut, uint32_t cut_length, uint32_t nSel, void* ptr );
00140 
00146         static void compute_output( double *output, void* ptr );
00147 
00154         static void sort( double* vals, uint32_t* idx, uint32_t size);
00155 
00156 
00157     protected:
00159         bool use_bias;
00161         INT bufsize;
00163         DREAL C1;
00165         DREAL C2;
00167         DREAL epsilon;
00169         E_SVM_TYPE method;
00170 
00172         DREAL* old_w;
00174         DREAL* tmp_a_buf;
00176         DREAL* lab;
00177         
00180         DREAL** cp_value;
00182         uint32_t** cp_index;
00184         uint32_t* cp_nz_dims;
00185 
00186 };
00187 #endif

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