An image processing system useful for facial recognition and security identification obtains an array of observation vectors from a facial image to be identified. A Viterbi algorithm is applied to the observation vectors given the parameters of a hierarchical statistical model for each object, and a...http://www.google.com/patents/US7171043?utm_source=gb-gplus-sharePatent US7171043 - Image recognition using hidden markov models and coupled hidden markov models
