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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* Written (W) 2006 Christian Gehl
* Copyright (C) 1999-2008 Fraunhofer Institute FIRST and Max-Planck-Society
*/
#ifndef _JENSENMETRIC_H___
#define _JENSENMETRIC_H___
#include "lib/common.h"
#include "distance/SimpleDistance.h"
#include "features/RealFeatures.h"
/** class JensenMetric */
class CJensenMetric: public CSimpleDistance<DREAL>
{
public:
/** default constructor */
CJensenMetric();
/** constructor
*
* @param l features of left-hand side
* @param r features of right-hand side
*/
CJensenMetric(CRealFeatures* l, CRealFeatures* r);
virtual ~CJensenMetric();
/** init distance
*
* @param l features of left-hand side
* @param r features of right-hand side
* @return if init was successful
*/
virtual bool init(CFeatures* l, CFeatures* r);
/** cleanup distance */
virtual void cleanup();
/** load init data from file
*
* @param src file to load from
* @return if loading was successful
*/
virtual bool load_init(FILE* src);
/** save init data to file
*
* @param dest file to save to
* @return if saving was successful
*/
virtual bool save_init(FILE* dest);
/** get distance type we are
*
* @return distance type JENSEN
*/
virtual EDistanceType get_distance_type() { return D_JENSEN; }
/** get name of the distance
*
* @return name Jensen-Metric
*/
virtual const CHAR* get_name() { return "Jensen-Metric"; };
protected:
/// compute distance for features a and b
/// idx_{a,b} denote the index of the feature vectors
/// in the corresponding feature object
virtual DREAL compute(INT idx_a, INT idx_b);
};
#endif /* _JENSENMETRIC_H___ */
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