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Table 2 Different criterions for performance evaluation

From: A framework for retinal vasculature segmentation based on matched filters

Measure Description
Sensitivity (Sen) TP/(TP + FN)
Specificity (Spe) TN/(TN + FP) or 1 − FPF
PPV TP/(TP + FP)
NPV TN/(TN + FN)
Accuracy (ACC) (TP + TN)/FOV pixel count
Accuracy (AUC) Area under ROC curve
Kappa (P(A) − P(E))/(1 − P(E))