Impala Documentation

void Impala::Core::Table::BayesCondProb::CalcGenreConditionalPriorProbability ( ) [inline]

Definition at line 101 of file BayesCondProb.h.

References Impala::Core::Table::Bayes::DumpMatrix(), Impala::Core::Table::Bayes::mAnnoTableSize, Impala::Core::Table::Bayes::mConceptNum, Impala::Core::Table::Bayes::mGenreNum, mProb_g_c, Impala::Core::Table::Bayes::tabConcept, and Impala::Core::Table::Bayes::tabGenre.

Referenced by CalcBayes().

00102     {
00103         //mProb_g_c = new double* [mGenreNum];
00104         //for (int j=0; j<mGenreNum; j++) mProb_g_c[j] = new double [mConceptNum];
00105 
00106         for (int j=0; j<mGenreNum; j++)
00107             memset(mProb_g_c[j],0,sizeof(double)*mConceptNum);
00108         
00109         for (int j=0; j<mGenreNum; j++)
00110         {      
00111             for (int k=0; k<mConceptNum; k++)
00112             {         
00113                 int countConcept = 0;
00114                 int countGenre = 0;
00115 
00116                 // loop for all the keyframes
00117                 for (int idx=0; idx<mAnnoTableSize; idx++)
00118                 {
00119                     if (tabConcept[k]->IsPositive(idx))
00120                     {
00121                         countConcept ++;
00122                         if (tabGenre[j]->IsPositive(idx))
00123                         {
00124                             countGenre++;
00125                         }
00126                     }               
00127                 }
00128 
00129                 // compute the conditional probability based on counting.
00130                 if (0 == countConcept)
00131                     mProb_g_c[j][k] = 0;
00132                 else
00133                     mProb_g_c[j][k] = countGenre*1.0/countConcept;
00134             }
00135         }
00136         DumpMatrix("mProb_g_c[j][k]", mProb_g_c, mGenreNum, mConceptNum);
00137     }

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