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GaussianShiftKernel.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) 2008 Gunnar Raetsch
00008  * Copyright (C) 2008-2009 Fraunhofer Institute FIRST and Max-Planck-Society
00009  */
00010 
00011 #ifndef _GAUSSIANSHIFTKERNEL_H___
00012 #define _GAUSSIANSHIFTKERNEL_H___
00013 
00014 #include <shogun/lib/common.h>
00015 #include <shogun/kernel/GaussianKernel.h>
00016 #include <shogun/features/DenseFeatures.h>
00017 
00018 namespace shogun
00019 {
00038 class CGaussianShiftKernel: public CGaussianKernel
00039 {
00040     public:
00042         CGaussianShiftKernel();
00043 
00051         CGaussianShiftKernel(
00052             int32_t size, float64_t width, int32_t max_shift,
00053             int32_t shift_step);
00054 
00064         CGaussianShiftKernel(
00065             CDenseFeatures<float64_t>* l, CDenseFeatures<float64_t>* r,
00066             float64_t width, int32_t max_shift, int32_t shift_step,
00067             int32_t size=10);
00068 
00075         virtual bool init(CFeatures* l, CFeatures* r)
00076         {
00077             return CGaussianKernel::init(l,r);
00078         }
00079 
00080         virtual ~CGaussianShiftKernel();
00081 
00086         virtual EKernelType get_kernel_type() { return K_GAUSSIANSHIFT; }
00087 
00092         virtual const char* get_name() const { return "GaussianShiftKernel"; }
00093 
00094     protected:
00103         virtual float64_t compute(int32_t idx_a, int32_t idx_b);
00104 
00105     private:
00106         void init();
00107 
00108     protected:
00110         int32_t max_shift;
00112         int32_t shift_step;
00113 };
00114 }
00115 #endif /* _GAUSSIANSHIFTKERNEL_H__ */
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