Table 20.

Hyperparameters chosen with random search for each architecture.

	lr	random rotation	brightness	horizontal flip	center crop	contrast
COVID-19 CT & Radiograph Image Data Stock binary CT
ResNet-18	0.001	+		+
ResNet-50	0.001
DenseNet-169	0.000001			+
WideResNet-50	0.0001	+
DenseNet-121+	0.001			+
COVID-19 CT & Radiograph Image Data Stock multiclass CT
ResNet-18	0.001	+		+
ResNet-50	0.0001	+		+		+
DenseNet-169	0.000001	+
WideResNet-50	0.000001
DenseNet-121+	0.001	+