| Mat* Impala::Core::Matrix::VectorQuantize | ( | Mat * | data, | |
| Mat * | codebook | |||
| ) |
Definition at line 52 of file VectorQuantize.h.
References MatE(), MatNrCol(), MatNrRow(), and VectorQuantizeX().
Referenced by KmeansClustering(), Impala::Core::Feature::InterestPointFeature::ProjectHardIndex(), and Impala::Core::Feature::InterestPointFeature::ProjectHardMatrix().
00053 { 00054 Timer vqTimer; 00055 int step = 10000; 00056 Mat* res = MatCreate<Mat>(MatNrRow(data), 2); 00057 // OpenMP support is possible, but do limit the step size or memory usage will explode 00058 //#pragma omp parallel for schedule(static) 00059 for(int i = 0; i < MatNrRow(data); i += step) 00060 { 00061 int s = MatNrRow(data) - i; 00062 if(step < s) s = step; 00063 00064 Mat* partial = MatCreate<Mat>(s, MatNrCol(data), MatE(data, i, 0), true); 00065 //std::cout << "QuantizePart" << i << " start " << vqTimer.SplitTimeStr() << std::endl; 00066 Mat* temp = VectorQuantizeX(partial, codebook); 00067 //std::cout << "QuantizePart" << i << " vq'd " << vqTimer.SplitTimeStr() << std::endl; 00068 for(int j = 0; j < s; j++) 00069 { 00070 *MatE(res, i + j, 0) = *MatE(temp, j, 0); 00071 *MatE(res, i + j, 1) = *MatE(temp, j, 1); 00072 } 00073 delete temp; 00074 delete partial; 00075 } 00076 return res; 00077 }
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