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WaveletKernel.h
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1 /*
2  * This program is free software; you can redistribute it and/or modify
3  * it under the terms of the GNU General Public License as published by
4  * the Free Software Foundation; either version 3 of the License, or
5  * (at your option) any later version.
6  *
7  * Written (W) 2011 Siddharth Kherada
8  * Copyright (C) 2007-2011 Fraunhofer Institute FIRST and Max-Planck-Society
9  */
10 
11 #ifndef _WAVELETKERNEL_H___
12 #define _WAVELETKERNEL_H___
13 
14 #include <shogun/lib/config.h>
15 
16 #include <shogun/lib/common.h>
19 
20 namespace shogun
21 {
38 {
39  public:
42 
50 
59  CWaveletKernel(CDotFeatures* l, CDotFeatures* r, int32_t size,float64_t Wdilation, float64_t Wtranslation);
60 
61  virtual ~CWaveletKernel();
62 
69  virtual bool init(CFeatures* l, CFeatures* r);
70 
71  virtual void cleanup();
72 
77  virtual EKernelType get_kernel_type() { return K_WAVELET; }
78 
83  virtual const char* get_name() const { return "WaveletKernel"; }
84 
85  protected:
94  virtual float64_t compute(int32_t idx_a, int32_t idx_b);
95 
96  protected:
99  {
100  return cos(1.75*h)*exp(-h*h/2);
101  }
102 
103  private:
104  void init();
105 
106  protected:
111 };
112 }
113 #endif /* _WAVELETKERNEL_H__ */

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