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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))