PyramidChi2.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) 2008-2009 Alexander Binder
00008  * Copyright (C) 2008-2009 Fraunhofer Institute FIRST and Max-Planck-Society
00009  */
00010 
00011 #ifndef PYRAMIDCHI2_H_
00012 #define PYRAMIDCHI2_H_
00013 
00014 #include "lib/common.h"
00015 #include "kernel/SimpleKernel.h"
00016 #include "features/Features.h"
00017 #include "features/SimpleFeatures.h"
00018 
00019 namespace shogun
00020 {
00021     template <class T> class CSimpleFeatures;
00022 
00030 class CPyramidChi2 : public CSimpleKernel<float64_t>
00031 {
00032 public:
00033 
00048     CPyramidChi2(int32_t size, int32_t num_cells2,
00049         float64_t* weights_foreach_cell2, 
00050         int32_t width_computation_type2,
00051         float64_t width2);
00052 
00071     CPyramidChi2(
00072         CSimpleFeatures<float64_t>* l, CSimpleFeatures<float64_t>* r, 
00073         int32_t size, int32_t num_cells2,
00074         float64_t* weights_foreach_cell2, 
00075         int32_t width_computation_type2,
00076         float64_t width2 );
00077 
00083     virtual bool init(CFeatures* l, CFeatures* r);
00084 
00085 
00086     virtual ~CPyramidChi2();
00087 
00089     virtual void cleanup();
00090 
00092     virtual EKernelType get_kernel_type()
00093     {
00094         //preliminary output
00095         return K_PYRAMIDCHI2;
00096     }
00097 
00099     virtual const char* get_name() const { return "PyramidoverChi2"; }
00100 
00101     // /** sets standard weights */
00102     //void setstandardweights();
00103 
00104     // /** performs a weak check, does not test for correct feature length */
00105     // bool sanitycheck_weak();
00106 
00107 protected:
00109     CPyramidChi2();
00116     virtual float64_t compute(int32_t idx_a, int32_t idx_b);
00117 
00118 protected:
00119 
00121     int32_t num_cells;
00122 
00124     float64_t* weights;
00125 
00127     int32_t width_computation_type;
00129     float64_t width;
00131     int32_t num_randfeats_forwidthcomputation;
00132 
00133 
00134 
00135 
00136 };
00137 }
00138 #endif /*PYRAMIDCHI2_H_*/

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