Impala Documentation

Real64 Impala::Core::VideoSet::ShotSegmenter::CalculateScores ( ) [inline, private]

Definition at line 952 of file ShotSegmenter.h.

References mCentered, mNormW, mRadius, mSim, Impala::Core::Array::MulVal(), mWeights, mWindowSize, Impala::Core::Array::PixMax(), and Impala::Core::Array::Array2dTem< StorT, elemSize, ArithT >::Value().

Referenced by HandleNewFrame().

00953     {
00954         if(mNormW)
00955         {
00956             //Scale the weights for visualization
00957             MulVal(mWeights,mWeights,1/PixMax(mWeights));
00958         }
00959         int center = mCentered ? mRadius +1 : mRadius;
00960 
00961         Real64 DisSimA=0;
00962         Real64 DisSimB=0;
00963         Real64 SimA=0;
00964         Real64 SimB=0;
00965         //include ==mRadius also
00966         for(int i=0;i<mRadius;i++)
00967         {
00968             for(int j=0;j<mRadius;j++)
00969             {
00970                 SimA+=mWeights->Value(i,j);
00971                 DisSimA+=mWeights->Value(i,j+center);
00972             }
00973         }
00974 
00975         for(int i=center;i<mWindowSize;i++)
00976         {
00977             for(int j=0;j<mRadius;j++)
00978             {
00979                 SimB+=mWeights->Value(i,j+center);
00980                 DisSimB+=mWeights->Value(i,j);
00981             }
00982             
00983         }
00984         Real64 CutAB=DisSimA+DisSimB;
00985         Real64 NCutAB=SimA+SimB;
00986 
00987         Real64 s = CutAB/SimA+CutAB/SimB;
00988         Real64 Ns=NCutAB/DisSimA+NCutAB/DisSimB;
00989 
00990         if((SimA*SimB==0)||(DisSimA*DisSimB==0))
00991         {
00992             return 4;
00993         }
00994 
00995         if(mSim=="+")
00996             return s;
00997         else if(mSim=="-")
00998             return Ns;
00999         else if(mSim=="log+")
01000             return log(s);
01001         else if(mSim=="log-")
01002             return log(Ns);
01003         return 0;
01004     }

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