Capsule neural network

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Capsule network try to perform the inverse of the rendering process.

See also Wikipedia: Capsule Neural Network

Dynamic Routing Between Capsules (NIPS 2017)


"A capsule is a group of neurons whose activity vector represents the instantiation
parameters of a specific type of entity such as an object or an object part." - Nips 2017 Paper
  • Rather than a neuron outputting one value, each capsule outputs a vector
  • Each capsule then predicts the next layer's output
    • Done through multiplication with a learned transformation matrix

Capsule Routing

Add Procedure 1 from the figure
  • Here \(\displaystyle b_{i,j}\) is a routing weight for link between capsules in the current and next layer