METHOD AND APPARATUS FOR IMAGE RECOGNITION

摘要

A method for image recognition is provided which involves storing a plurality of two-dimensional hidden Markov models (60) each such model comprising a one-dimensional shape-level hidden Markov model comprising one or more shape-level states, each shape-level state comprising a one-dimensional pixel-level hidden Markov model comprising one or more pixel-level states. An image is scanned to produce one or more sequences of pixels. For a stored two-dimensional hidden Markov model, local Viterbi scores for a plurality of pixel-level hidden Markov models are determined for each sequence of pixels (6). A global Viterbi score of a shape-level hidden Markov model is determined based on a plurality of local Viterbi scores and the sequences of pixels. The scanned image is recognized based on one or more global Viterbi scores.