Fig. 4

The values of a precision, b F1-score, c mean opportunity error (MOE), and d cumulative opportunity error (COE) considering a case with 20 actual positives. Precision and F1-score are a function of true positives (TP) and false positives (FP). The MOE is shown as a function of the estimated (\({\hat{n}}_t\)) and actual (\(n_t\)) number of people with OTS. The COE is shown as a function of the estimated (\({\hat{n}}_{1:T}\)) and actual (\(n_{1:T}\)) cumulative number of people with OTS for the whole video