Fig. 3

Receiver operating characteristic (ROC) curve and confusion matrices for discerning overall image quality and capturing issues in the internal test set. (A,D) ROC curve and confusion matrix for discerning poor, adequate and excellent quality images. (B,E) ROC curve and confusion matrix for discerning the causes of adequate quality. (C,F) ROC curve and confusion matrix for discerning the causes of poor quality. (DC: Defective contact; OF: Out of focus; IPD: Inadequate pupil dilatation).