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General Text Line Extraction Approach based on Locally Orientation Estimation

By Nazih Ouwayed A, Abdel Belaïd A and François Auger B

Abstract

This paper presents a novel approach for the multi-oriented text line extraction from historical handwritten Arabic documents. Because of the multi-orientation of lines and their dispersion in the page, we use an image paving allowing us to progressively and locally determine the lines. The paving is initialized with a small window and then its size is corrected by extension until enough lines and connected components were found. We use the Snake for line extraction. Once the paving is established, the orientation is determined using the Wigner-Ville distribution on the histogram projection profile. This local orientation is then enlarged to limit the orientation in the neighborhood. Afterwards, the text lines are extracted locally in each zone basing on the follow-up of the baselines and the proximity of connected components. Finally, the connected components that overlap and touch in adjacent lines are separated. The morphology analysis of the terminal letters of Arabic words is here considered. The proposed approach has been experimented on 100 documents reaching an accuracy of about 98.6%. Keywords: Handwritten Arabic documents, text line segmentation, skew angle estimation, Snake, Wigner-Vill

Topics: distribution, overlapping
Year: 2011
OAI identifier: oai:CiteSeerX.psu:10.1.1.190.1341
Provided by: CiteSeerX
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