Font adaptation of an HMM-based OCR system
Identifieur interne : 000592 ( Main/Exploration ); précédent : 000591; suivant : 000593Font adaptation of an HMM-based OCR system
Auteurs : Kamel Ait-Mohand [France] ; Laurent Heutte [France] ; Thierry Paquet [France] ; Nicolas Ragot [France]Source :
Abstract
We create a polyfont OCR recognizer using HMM (Hidden Markov models) models of character trained on a dataset of various fonts. We compare this system to monofont recognizers showing its decrease of performance when it is used to recognize unseen fonts. In order to fill this gap of performance, we adapt the parameters of the models of the polyfont recognizer to a new dataset of unseen fonts using four different adaptation algorithms. The results of our experiments show that the adapted system is far more accurate than the initial system although it does not reach the accuracy of a monofont recognizer.
Url:
Affiliations:
- France
- Centre-Val de Loire, Région Bourgogne, Région Centre
- Rouen, Tours
- Centre Val de Loire Université, Université François-Rabelais de Tours, Université de Rouen
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We compare this system to monofont recognizers showing its decrease of performance when it is used to recognize unseen fonts. In order to fill this gap of performance, we adapt the parameters of the models of the polyfont recognizer to a new dataset of unseen fonts using four different adaptation algorithms. The results of our experiments show that the adapted system is far more accurate than the initial system although it does not reach the accuracy of a monofont recognizer.</div></front></TEI><affiliations><list><country><li>France</li></country><region><li>Centre-Val de Loire</li><li>Région Bourgogne</li><li>Région Centre</li></region><settlement><li>Rouen</li><li>Tours</li></settlement><orgName><li>Centre Val de Loire Université</li><li>Université François-Rabelais de Tours</li><li>Université de Rouen</li></orgName></list><tree><country name="France"><region name="Région Bourgogne"><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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