Table 3.

Data augmentation for detecting COVID-19 from CXR.

Model	Software	Norm.	Size	Flip	Rotate	Zoom	Light	Extra
VGG-16 [25]	Keras, Tenserflow	_	220*220	HORIZ	15	85-	_	shear transformation
						115%		mixup: 0.1
DarkCovidNet [24]	fastai v1, Pytorch	yes	256*256	_	_	_	_	defult values of fastai
CovXNet [22]	Keras, Tenserflow	yes	uniform	_	30	0.2	_	rescale: 1/255
								shift: 0.1
COVID-Net [20]	Keras, Tenserflow	yes	480*480	HORIZ	yes	yes	_	intensity shift
MobileNet-v2 [26]	_	_	200*266	_	_	_	_	blackground: 1:1.5