Table 6. Results of extensive experiments performed to determine the base learners for forming the ensemble in this study.

Model-1	Model-2	Model-3	Acc(%)	Pre(%)	Rec(%)	F1(%)
NasNetMobile	MobileNet v2	ResNet-152	96.67	96.70	96.67	96.68
NasNetMobile	MobileNet v2	ResNet-50	97.00	97.02	97.01	97.01
NasNetMobile	MobileNet v2	DenseNet-169	96.41	96.40	96.41	96.41
NasNetMobile	MobileNet v2	DenseNet-201	96.06	96.21	96.07	96.11
MobileNet v2	ResNet-152	DenseNet-169	96.92	97.03	96.92	96.95
MobileNet v2	ResNet-50	DenseNet-169	97.77	97.82	97.78	97.79
MobileNet v2	ResNet-50	DenseNet-201	95.98	96.40	95.98	96.06
MobileNet v2	ResNet-152	DenseNet-201	94.87	95.57	94.87	94.99
NasNetMobile	ResNet-152	DenseNet-169	95.21	95.71	95.21	95.31
NasNetMobile	ResNet-152	DenseNet-201	92.56	94.06	92.56	92.81
NasNetMobile	ResNet-50	DenseNet-169	96.41	96.66	96.41	96.46
NasNetMobile	ResNet-50	DenseNet-201	92.99	94.28	92.99	93.20
GoogLeNet	ResNet-152	DenseNet-121	97.17	97.37	97.18	97.21
GoogLeNet	ResNet-152	DenseNet-201	95.04	95.65	95.04	95.15
GoogLeNet	ResNet-18	DenseNet-201	98.20	98.23	98.21	98.21
GoogLeNet	MobileNet v2	DenseNet-121	98.29	98.29	98.29	98.29
GoogLeNet	ResNet-18	MobileNet v2	98.54	98.54	98.55	98.54
GoogLeNet	MobileNet v2	NasNetMobile	98.12	98.13	98.12	98.11
GoogLeNet	ResNet-18	DenseNet-121	98.81	98.82	98.80	98.35