Table 2. The number of features extracted and the number of layers of the architecture of the five CNNs.

CNN Structure	Number of layers	Size of input
GoogleNet	22	224 × 224
AlexNet	8	227 × 227
ResNet-50	50	224 × 224
ShuffleNet	50	224 × 224
Inception-ResNet V2	164	229 × 229