Hands-On Transfer Learning with Python

Feature-extraction

As discussed in Chapter 3, Understanding Deep Learning Architectures deep learning systems are layered architectures that learn different features at different layers. These layers are then finally connected to a last layer (usually a fully connected layer, in the case of classification) to get the final output. This layered architecture allows us to utilize a pretrained network (such as Inception V3 or VGG) without its final layer as a fixed feature-extractor for other tasks. The following diagram represents deep transfer based on feature-extraction:

For instance, if we utilize AlexNet without its final classification layer, ...