ChiHistogramCostExtractorImpl  371 modules/shape/src/hist_cost.cpp void ChiHistogramCostExtractorImpl::buildCostMatrix(InputArray _descriptors1, InputArray _descriptors2, OutputArray _costMatrix)
ChiHistogramCostExtractorImpl  422 modules/shape/src/hist_cost.cpp     return Ptr <HistogramCostExtractor>( new ChiHistogramCostExtractorImpl(nDummies, defaultCost) );