Per citar aquest document: http://ddd.uab.cat/record/24339
Handwritten Document Analysis for Automatic Writer Recognition
Bensefia, Ameur (Université de Rouen. Laboratoire PSI)
Paquet, Thierry (Université de Rouen. Laboratoire PSI)
Heutte, Laurent (Université de Rouen. Laboratoire PSI)

Data: 2005
Resum: In this paper, we show that both the writer identification and the writer verification tasks can be carried out using local features such as graphemes extracted from the segmentation of cursive handwriting. We thus enlarge the scope of the possible use of these two tasks which have been, up to now, mainly evaluated on script handwritings. A textual based Information Retrieval model is used for the writer identification stage. This allows the use of a particular feature space based on feature frequencies. Image queries are handwritten documents projected in this feature space. The approach achieves 95% correct identification on the PSI_DataBase and 86% on the IAM_DataBase. Then writer hypothesis retrieved are analysed during a verification phase. We call upon a mutual information criterion to verify that two documents may have been produced by the same writer or not. Hypothesis testing is used for this purpose. The proposed method is first scaled on the PSI_DataBase then evaluated on the IAM_DataBase. On both databases, similar performance of nearly 96% correct verification is reported, thus making the approach general and very promising for large scale applications in the domain of handwritten document querying and writer verification.
Drets: Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. Creative Commons
Llengua: Anglès.
Document: article ; recerca ; publishedVersion
Matèria: Handwritten documents ; Writer identification ; Writer verification ; Information retrieval ; Mutual information ; Hypothesis testing ; Graphemes ; Documents manuscrits ; Identificació d'autor/escriptor ; Verificació d'autor/escriptor ; Recuperació de la informació ; Informació comuna ; Prova d'hipòtesis ; Grafemes ; Documentos manuscritos ; Identificación de autor / escritor ; Verificación de autor / escritor ; Recuperación de la información ; Información común ; Prueba de hipótesis ; Grafemas
Publicat a: ELCVIA : Electronic Letters on Computer Vision and Image Analysis, V. 5 n. 2 (2005) p. 72-86, ISSN 1577-5097

Adreça alternativa: http://www.raco.cat/index.php/ELCVIA/article/view/31615


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