Directly four groups of convolutional layers and maximum pool words, one layer classification and one layer result
After adding data enhancement:
Fast feature extraction without data augmentation
Add your own classifier after VG16 (two Dense, one dropout regularization)
VGG16 freezes and uses data-enhanced feature extraction.
VGG16 freezes, uses data-enhanced feature extraction, and after training the classifier, fine-tune the layer above block5_conv1 of the model.