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 #include "preproc/NormOne.h" 00012 #include "preproc/SimplePreProc.h" 00013 #include "lib/Mathematics.h" 00014 #include "features/Features.h" 00015 #include "features/RealFeatures.h" 00016 00017 CNormOne::CNormOne() 00018 : CSimplePreProc<float64_t>("NormOne", "NRM1") 00019 { 00020 } 00021 00022 CNormOne::~CNormOne() 00023 { 00024 } 00025 00027 bool CNormOne::init(CFeatures* f) 00028 { 00029 ASSERT(f->get_feature_class()==C_SIMPLE); 00030 ASSERT(f->get_feature_type()==F_DREAL); 00031 00032 return true; 00033 } 00034 00036 void CNormOne::cleanup() 00037 { 00038 } 00039 00041 bool CNormOne::load(FILE* f) 00042 { 00043 return false; 00044 } 00045 00047 bool CNormOne::save(FILE* f) 00048 { 00049 return false; 00050 } 00051 00055 float64_t* CNormOne::apply_to_feature_matrix(CFeatures* f) 00056 { 00057 int32_t num_vec; 00058 int32_t num_feat; 00059 float64_t* matrix=((CRealFeatures*) f)->get_feature_matrix(num_feat, num_vec); 00060 00061 for (int32_t i=0; i<num_vec; i++) 00062 { 00063 float64_t* vec=&matrix[i*num_feat]; 00064 float64_t norm=CMath::sqrt(CMath::dot(vec, vec, num_feat)); 00065 CMath::scale_vector(1.0/norm, vec, num_feat); 00066 } 00067 return matrix; 00068 } 00069 00072 float64_t* CNormOne::apply_to_feature_vector(float64_t* f, int32_t& len) 00073 { 00074 float64_t* vec=new float64_t[len]; 00075 float64_t norm=CMath::sqrt(CMath::dot(f, f, len)); 00076 00077 for (int32_t i=0; i<len; i++) 00078 vec[i]=f[i]/norm; 00079 00080 return vec; 00081 } 00082 00084 bool CNormOne::load_init_data(FILE* src) 00085 { 00086 return true; 00087 } 00088 00090 bool CNormOne::save_init_data(FILE* dst) 00091 { 00092 return true; 00093 }