SparseEuclidianDistance.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 Soeren Sonnenburg
00008  * Copyright (C) 2007-2008 Fraunhofer Institute FIRST and Max-Planck-Society
00009  */
00010 
00011 #ifndef _SPARSEEUCLIDIANDISTANCE_H__
00012 #define _SPARSEEUCLIDIANDISTANCE_H__
00013 
00014 #include "lib/common.h"
00015 #include "distance/SparseDistance.h"
00016 #include "features/SparseFeatures.h"
00017 
00019 class CSparseEuclidianDistance: public CSparseDistance<float64_t>
00020 {
00021     public:
00023         CSparseEuclidianDistance();
00024 
00030         CSparseEuclidianDistance(
00031             CSparseFeatures<float64_t>* l, CSparseFeatures<float64_t>* r);
00032         virtual ~CSparseEuclidianDistance();
00033 
00040         virtual bool init(CFeatures* l, CFeatures* r);
00041 
00043         virtual void cleanup();
00044 
00050         virtual bool load_init(FILE* src);
00051 
00057         virtual bool save_init(FILE* dest);
00058 
00063         virtual EDistanceType get_distance_type() { return D_SPARSEEUCLIDIAN; }
00064 
00069         inline virtual EFeatureType get_feature_type() { return F_DREAL; }
00070 
00075         virtual const char* get_name() { return "SparseEuclidian"; }
00076 
00077     protected:
00081         virtual float64_t compute(int32_t idx_a, int32_t idx_b);
00082         /*    compute_kernel*/
00083 
00084     protected:
00086         float64_t scale;
00087 
00089         float64_t* sq_lhs;
00091         float64_t* sq_rhs;
00092 
00093 };
00094 
00095 #endif /* _SPARSEEUCLIDIANDISTANCE_H__ */

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