Caffe model file formats

To be able to use Caffe models in Caffe2, we first need to understand the model file formats that Caffe can export to. Caffe exports a trained model into two files, as follows:

1. The structure of the neural network is stored as a .prototxt file
2. The weights of the layers of the neural network are stored as a .caffemodel file

Prototxt file

The prototxt is a text file that holds information about the structure of the neural network:

• A list of layers in the neural network
• The parameters of each layer, such as its name, type, input dimensions, and output dimensions
• The connections between the layers

Caffe exports a neural network by serializing it using the Google Protocol Buffers (ProtoBuf) serialization...