Table 3. Comparison of diagnostic performance between using and not using the proposed pre-processing procedures.

	Accuracy	Sensitivity	Specificity	Precision	F1-Score
Proposed scheme	0.853 ± 0.050	0.822 ± 0.087	0.912 ± 0.034	0.829 ± 0.089	0.822 ± 0.065
Basic scheme	0.747 ± 0.027	0.738 ± 0.124	0.878 ± 0.057	0.735 ± 0.071	0.725 ± 0.070

The values are given as the mean and the standard deviation by 5-fold cross validation. The best performing CNN model (EfficientNet-b2) was used for comparison.