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| HAL : hal-00672002, version 1 |
| Fiche détaillée |  Récupérer au format |
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| Document Recognition and Retrieval XIX, Part of the IS&T/SPIE 24th Annual Symposium on Electronic Imaging, San Francisco : United States (2012) |
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| Quantifying spatial relations to discover handwritten graphical symbols |
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Jinpeng Li 1Harold Mouchère 1 |
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| (01/2012) |
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| To model a handwritten graphical language, spatial relations describe how the strokes are positioned in the 2-dimensional space. Most of existing handwriting recognition systems make use of some predefined spatial relations. However, considering a complex graphical language, it is hard to express manually all the spatial relations. Another possibility would be to use a clustering technique to discover the spatial relations. In this paper, we discuss how to create a relational graph between strokes (nodes) labeled with graphemes in a graphical language. Then we vectorize spatial relations (edges) for clustering and quantization. As the targeted application, we extract the repetitive sub-graphs (graphical symbols) composed of graphemes and learned spatial relations. On two handwriting databases, a simple mathematical expression database and a complex flowchart database, the unsupervised spatial relations outperform the predefined spatial relations. In addition, we visualize the frequent patterns on two text-lines containing Chinese characters. |
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| 1 : | Institut de Recherche en Communications et en Cybernétique de Nantes (IRCCyN) |
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CNRS : UMR6597 – PRES Université Nantes Angers Le Mans [UNAM] – École Centrale de Nantes – École Nationale Supérieure des Mines - Nantes – Ecole Polytechnique de l'Université de Nantes |
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| irccyn-ivc |
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| Domaine | : | Informatique/Traitement du signal et de l'image Sciences de l'ingénieur/Traitement du signal et de l'image |
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| Spatial Relations – Unsupervised Learning – Graphical Symbol Discovery – On-line Handwriting |
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| hal-00672002, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00672002 | |
| oai:hal.archives-ouvertes.fr:hal-00672002 | |
| Contributeur : Laurent Homa | |
| Soumis le : Lundi 20 Février 2012, 12:22:46 | |
| Dernière modification le : Lundi 20 Février 2012, 14:28:24 | |
