Efficient Framework for Detection of COVID-19 Omicron and Delta Variants Based on Two Intelligent Phases of CNN Models

Table 3

Parameters of both phases of the model after tuning.

	Optimizer	Learning rate	Initial learning rate	Decay rate	Decay steps	Loss	Epoch	Batch size
Phase 1	Adam	Exponentially decay	0.0001	0.96	40	Sparse categorical cross entropy	40	32
Phase 2	Adam		0.0001			Sparse categorical cross entropy	30	32