Table 3.

Diagnostic ability of the AI system with each data-augmentation method.

	Sensitivity	Specificity	Accuracy	PPV	NPV
No data-augmention	87.5	79.7	83.7	81.8	86.7
G	91.4	85.0	88.2	86.7	91.7
C	87.2	77.8	82.6	80.0	86.1
K	87.1	76.3	81.8	79.5	85.7
G + C	86.7	68.7	77.7	74.1	83.6
C + K	84.6	76.2	80.4	78.8	83.5
K + G	91.9	83.5	87.7	85.1	92.0
G + C + K	86.8	73.7	80.4	77.4	85.1

AI, Artificial intelligence.

PPV, Positive predictive value.

NPV, Negative predictive value.

G, Geometric transformations.

C, Color space transformations.

K, Kernel filtering.