Unsupervised image categorization and affinity propagation clustering
AP (Affinity Propagation) finds a set of exemplars, , in the dataset and assigns nonselected points to the exemplars. An exemplar is the representative of a cluster.
Two types of messages are exchanged between data objects or points; they are explained here:
- The r(i,k) message, which is called responsibility, represents the accumulated evidence sent from to . It informs us that ...