Mixture.h
Go to the documentation of this file.00001 /************************************************************************ 00002 * Copyright (C) 2012 Eindhoven University of Technology (TU/e). * 00003 * All rights reserved. * 00004 ************************************************************************ 00005 * Redistribution and use in source and binary forms, with or without * 00006 * modification, are permitted provided that the following conditions * 00007 * are met: * 00008 * * 00009 * 1. Redistributions of source code must retain the above * 00010 * copyright notice, this list of conditions and the following * 00011 * disclaimer. * 00012 * * 00013 * 2. Redistributions in binary form must reproduce the above * 00014 * copyright notice, this list of conditions and the following * 00015 * disclaimer in the documentation and/or other materials * 00016 * provided with the distribution. * 00017 * * 00018 * THIS SOFTWARE IS PROVIDED BY TU/e "AS IS" AND ANY EXPRESS OR * 00019 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * 00020 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * 00021 * ARE DISCLAIMED. IN NO EVENT SHALL TU/e OR CONTRIBUTORS BE LIABLE * 00022 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * 00023 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT * 00024 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; * 00025 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * 00026 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * 00027 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE * 00028 * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH * 00029 * DAMAGE. * 00030 * * 00031 * The views and conclusions contained in the software and * 00032 * documentation are those of the authors and should not be * 00033 * interpreted as representing official policies, either expressed or * 00034 * implied, of TU/e. * 00035 ************************************************************************/ 00036 00037 #ifndef PROBLIB_MIXTUREPDF_H_ 00038 #define PROBLIB_MIXTUREPDF_H_ 00039 00040 #include "PDF.h" 00041 #include "problib/pdfs/Gaussian.h" 00042 #include "problib/pdfs/Uniform.h" 00043 00044 namespace pbl { 00045 00054 class Mixture: public PDF { 00055 00056 public: 00057 00061 Mixture(); 00062 00063 /* 00064 Mixture(const PDF& pdf, double w = 1); 00065 */ 00066 00070 Mixture(const Mixture& orig); 00071 00075 virtual ~Mixture(); 00076 00082 Mixture& operator=(const Mixture& other); 00083 00089 Mixture* clone() const; 00090 00091 double getLikelihood(const PDF& pdf) const; 00092 00096 void clear(); 00097 00102 int components() const; 00103 00107 double getMaxDensity() const; 00108 00114 void addComponent(const PDF& pdf, double w); 00115 00121 const PDF& getComponent(int i) const; 00122 00128 double getWeight(int i) const; 00129 00133 void normalizeWeights(); 00134 00140 std::string toString(const std::string& indent = "") const; 00141 00142 protected: 00143 00144 struct MixtureStruct { 00145 00146 int num_components_; 00147 00148 std::vector<PDF*> components_; 00149 00150 std::vector<double> weights_; 00151 00152 double weights_total_; 00153 00154 int n_ptrs_; 00155 00156 MixtureStruct() : num_components_(0) , weights_total_(0), n_ptrs_(1) { } 00157 00158 MixtureStruct(const MixtureStruct& orig) : num_components_(orig.num_components_), weights_(orig.weights_), 00159 weights_total_(orig.weights_total_), n_ptrs_(1) { 00160 00161 for (std::vector<PDF*>::const_iterator it_pdf = orig.components_.begin(); it_pdf != orig.components_.end(); ++it_pdf) { 00162 components_.push_back((*it_pdf)->clone()); 00163 } 00164 } 00165 00166 ~MixtureStruct() { 00167 for (std::vector<PDF*>::const_iterator it_pdf = components_.begin(); it_pdf != components_.end(); ++it_pdf) { 00168 delete *it_pdf; 00169 } 00170 } 00171 }; 00172 00173 MixtureStruct* ptr_; 00174 00175 void cloneStruct(); 00176 00177 }; 00178 00179 } 00180 00181 #endif /* MIXTUREPDF_H_ */