Curvelets based feature extraction of handwritten shapes for ancient manuscripts classification

Guillaume Joutel; Véronique Eglin; Stéphane Bres; Hubert Emptoz

doi:10.1117/12.704450

29 January 2007 Curvelets based feature extraction of handwritten shapes for ancient manuscripts classification

Guillaume Joutel, Véronique Eglin, Stéphane Bres, Hubert Emptoz

Proceedings Volume 6500, Document Recognition and Retrieval XIV; 65000D (2007) https://doi.org/10.1117/12.704450
Event: Electronic Imaging 2007, 2007, San Jose, CA, United States

Abstract

The aim of this scientific work is to propose a suitable assistance tool for palaeographers and historians to help them in their intuitive and empirical work of identification of writing styles (for medieval handwritings) and authentication of writers (for humanistic manuscripts). We propose a global approach of writers' classification based on Curvelets based features in relation with two discriminative shapes properties, the curvature and the orientation. Those features are revealing of structural and directional micro-shapes and also of concavity that captures the finest variations in the contour. The Curvelets based analysis leads to the construction of a compact Log-polar signature for each writing. The relevance of the signature is quantified with a CBIR (content based image retrieval) system that compares request images and database images candidates. The main experimental results are very promising and show 78% of good retrieval (as precision) on the Middle-Ages database and 89% on the humanistic database.

Citation Download Citation

Guillaume Joutel, Véronique Eglin, Stéphane Bres, and Hubert Emptoz "Curvelets based feature extraction of handwritten shapes for ancient manuscripts classification", Proc. SPIE 6500, Document Recognition and Retrieval XIV, 65000D (29 January 2007); https://doi.org/10.1117/12.704450

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