# Capsule neural network


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

Dynamic Routing Between Capsules (NIPS 2017)

## Capsule

"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

Todo
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