An HMM-based approach for off-line unconstrained handwritten word modeling and recognition

A. El-Yacoubi, M. Gilloux, R. Sabourin, C.Y. Suen
1999 IEEE Transactions on Pattern Analysis and Machine Intelligence  
AbstractÐThis paper describes a hidden Markov model-based approach designed to recognize off-line unconstrained handwritten words for large vocabularies. After preprocessing, a word image is segmented into letters or pseudoletters and represented by two feature sequences of equal length, each consisting of an alternating sequence of shape-symbols and segmentationsymbols, which are both explicitly modeled. The word model is made up of the concatenation of appropriate letter models consisting of
more » ... lementary HMMs and an HMM-based interpolation technique is used to optimally combine the two feature sets. Two rejection mechanisms are considered depending on whether or not the word image is guaranteed to belong to the lexicon. Experiments carried out on real-life data show that the proposed approach can be successfully used for handwritten word recognition.
doi:10.1109/34.784288 fatcat:dfpd4bi2jrazzlxpzsx3tbqthq