Adaptation de modèles de Markov cachés - Application à la reconnaissance de caractères imprimés
Identifieur interne : 000918 ( Main/Exploration ); précédent : 000917; suivant : 000919Adaptation de modèles de Markov cachés - Application à la reconnaissance de caractères imprimés
Auteurs : Kamel Ait-Mohand [France] ; Laurent Heutte [France] ; Thierry Paquet [France] ; Nicolas Ragot [France]Source :
Descripteurs français
Abstract
We present in this paper a new algorithm for the adaptation of hidden Markov models (HMM models). The principle of our iterative adaptive algorithm is to alternate an HMM structure adaptation stage with an HMM Gaussian MAP adaptation stage. This algorithm is applied to the recognition of printed characters to adapt the models learned by a polyfont character recognition engine to new forms of characters. Comparing the results with those of MAP and MLLR classic adaptations shows a slight increase in the performance of the recognition system.
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The principle of our iterative adaptive algorithm is to alternate an HMM structure adaptation stage with an HMM Gaussian MAP adaptation stage. This algorithm is applied to the recognition of printed characters to adapt the models learned by a polyfont character recognition engine to new forms of characters. Comparing the results with those of MAP and MLLR classic adaptations shows a slight increase in the performance of the recognition system.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Haute-Normandie</li><li>Région Normandie</li></region><settlement><li>Le Havre</li><li>Rouen</li></settlement><orgName><li>Université de Rouen</li><li>Université du Havre</li></orgName></list><tree><country name="France"><region name="Région Normandie"><name sortKey="Ait Mohand, Kamel" sort="Ait Mohand, Kamel" uniqKey="Ait Mohand K" first="Kamel" last="Ait-Mohand">Kamel Ait-Mohand</name></region><name sortKey="Heutte, Laurent" sort="Heutte, Laurent" uniqKey="Heutte L" first="Laurent" last="Heutte">Laurent Heutte</name><name sortKey="Paquet, Thierry" sort="Paquet, Thierry" uniqKey="Paquet T" first="Thierry" last="Paquet">Thierry Paquet</name><name sortKey="Ragot, Nicolas" sort="Ragot, Nicolas" uniqKey="Ragot N" first="Nicolas" last="Ragot">Nicolas Ragot</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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