CircularKernel.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) 2011 Abhinav Maurya
00008  * Copyright (C) 2011 Berlin Institute of Technology and Max-Planck-Society
00009  * Copyright (C) 2011 Indian Institute of Technology Bombay
00010  */
00011 
00012 #include <shogun/lib/config.h>
00013 
00014 #ifndef _CIRCULARKERNEL_H__
00015 #define _CIRCULARKERNEL_H__
00016 
00017 #include <shogun/lib/common.h>
00018 #include <shogun/kernel/Kernel.h>
00019 #include <shogun/distance/Distance.h>
00020 
00021 namespace shogun
00022 {
00023 
00024 class CDistance;
00025 
00038 class CCircularKernel: public CKernel
00039 {
00040     public:
00042     CCircularKernel();
00043 
00050     CCircularKernel(int32_t size, float64_t sigma, CDistance* dist);
00051 
00059     CCircularKernel(CFeatures *l, CFeatures *r, float64_t sigma, CDistance* dist);
00060 
00067     virtual bool init(CFeatures* l, CFeatures* r);
00068 
00072     inline virtual EKernelType get_kernel_type() { return K_CIRCULAR; }
00073 
00077     inline virtual EFeatureType get_feature_type() { return distance->get_feature_type(); }
00078 
00082     inline virtual EFeatureClass get_feature_class() { return distance->get_feature_class(); }
00083 
00087     inline virtual const char* get_name() const { return "CircularKernel"; }
00088 
00093     inline virtual void set_sigma(float64_t s)
00094     {
00095         sigma=s;
00096     }
00097 
00102     inline virtual float64_t get_sigma() const
00103     {
00104         return sigma;
00105     }
00106 
00107     virtual ~CCircularKernel();
00108 
00117     virtual void load_serializable_post() throw (ShogunException);
00118 
00128     virtual float64_t compute(int32_t idx_a, int32_t idx_b);
00129 
00130 private:
00131     void init();
00132 
00133 protected:
00134 
00136     CDistance* distance;
00137 
00139     float64_t sigma;
00140 
00141 };
00142 }
00143 
00144 #endif /* _CIRCULARKERNEL_H__ */
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