Table 1. The collected datasets of the normal, COVID-19, and pneumonia X-ray images before and after the augmentation process.

Dataset name	# of Instances	# of Classes	Labels	Balance
Dataset-1	50	2	Normal: 25	1.0
			COVID-19: 25
Dataset-2	455	2	Normal: 234	0.94
			COVID-19: 221
Dataset-3	603	3	Normal: 234	0.8
			COVID-19: 221
			Pneumonia: 148
Toğaçar, Ergen & Cömert (2020)	458	3	Normal: 295	0.7
			COVID-19: 65
			Pneumonia: 98