Table 7. Model performance before and after data augmentation on the COVID-19 dataset.

Augmentation status	Accuracy	Recall	Precision	Specificity	F1 Score	AUC
Before augmentation	0.9688	0.9412	1.0000	1.0000	0.9697	0.9706
After augmentation	0.9866	0.9722	1.0000	1.0000	0.9856	0.9992