Automatic detection     W N1 N2 N3 R Sensitivity (%) Visual detection W 524 6 163 5 28 87 N1 50 150 163 9 36 70 N2 25 5 3091 13 44 80 N3 10 0 191 224 19 85 R 186 11 277 16 836 78 Specificity (%) 88 88 60 87.6 82.2

Table 2: The confusion matrix of a PLMS patient.