Marsyas  0.5.0-beta1
/Users/jleben/code/marsyas/src/marsyas/marsystems/GMMClassifier.h
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00001 /*
00002  ** Copyright (C) 1998-2006 George Tzanetakis <gtzan@cs.uvic.ca>
00003  **
00004  ** This program is free software; you can redistribute it and/or modify
00005  ** it under the terms of the GNU General Public License as published by
00006  ** the Free Software Foundation; either version 2 of the License, or
00007  ** (at your option) any later version.
00008  **
00009  ** This program is distributed in the hope that it will be useful,
00010  ** but WITHOUT ANY WARRANTY; without even the implied warranty of
00011  ** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00012  ** GNU General Public License for more details.
00013  **
00014  ** You should have received a copy of the GNU General Public License
00015  ** along with this program; if not, write to the Free Software
00016  ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
00017  */
00018 
00019 #ifndef MARSYAS_GMMCLASSIFIER_H
00020 #define MARSYAS_GMMCLASSIFIER_H
00021 
00022 #include <marsyas/system/MarSystem.h>
00023 #include <vector>
00024 
00025 namespace Marsyas
00026 {
00063 class GMMClassifier: public MarSystem
00064 {
00065 private:
00066   mrs_real factor_; // a constant
00067 
00068   mrs_natural labelRow_;
00069 
00070   std::vector<realvec> probs_;
00071   std::vector<realvec> ssprobs_;
00072 
00073   std::vector<realvec> vars_;
00074   std::vector<realvec> covars_;
00075   std::vector<realvec> means_;
00076   std::vector<realvec> omeans_;
00077   std::vector<realvec> weights_;
00078 
00079   realvec trainMatrix_;
00080   realvec likelihoods_;
00081   realvec classSizes_;
00082   realvec accumVec_;
00083   realvec temp_;
00084   realvec sprobs_;
00085   realvec sum_;
00086 
00087   mrs_string prev_mode_;
00088   MarControlPtr ctrl_mode_;
00089 
00090   MarControlPtr ctrl_nClasses_;
00091 
00092   mrs_natural featSize_;            // Nr of features
00093   mrs_natural classSize_;           // Nr of classes (aka labels)
00094   mrs_natural nMixtures_;           // Nr of Gaussian mixtures
00095   mrs_natural iterations_;      // EM algorithm iterations
00096   mrs_natural kiterations_;     // K-MEANS initialization iterations
00097   mrs_natural eiterations_;     // Evaluation-training iterations
00098   MarControlPtr ctrl_nMixtures_;
00099   MarControlPtr ctrl_iterations_;
00100   MarControlPtr ctrl_kiterations_;
00101   MarControlPtr ctrl_eiterations_;
00102 
00103   void initialize();
00104   mrs_real gaussian(mrs_natural cl, mrs_natural k, realvec& vec);
00105   void doEM();
00106   void addControls();
00107   void myUpdate(MarControlPtr sender);
00108 
00109 public:
00110   GMMClassifier(std::string name);
00111   GMMClassifier(const GMMClassifier& a);
00112   ~GMMClassifier();
00113   MarSystem* clone() const;
00114 
00115   void myProcess(realvec& in, realvec& out);
00116 };
00117 
00118 }//namespace Marsyas
00119 
00120 #endif
00121 
00122 
00123