Restoration of arbitrarily warped historical document images using flow lines

Rahnemoonfar, M and Antonacopoulos, A ORCID: https://orcid.org/0000-0001-9552-0233 2011, Restoration of arbitrarily warped historical document images using flow lines , in: Document Analysis and Recognition (ICDAR), 2011 International Conference, 18-21 Sept. 2011, Beijing.

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Abstract

Historical documents frequently suffer from arbitrary geometric distortions (warping and folds) due to storage conditions, use and to, some extent, the printing process of the time. In addition, page curl can be prominent due to the scanning technique used. Such distortions adversely affect OCR and print-on-demand quality. Previous approaches to geometric restoration either focus only on the correction of page curl or require supplementary informatio n obtained by additional scanning hardware ` not practical for existing scans. This paper presents a new approach to detect and restore arbitrary warping and folds, in addition to page curl. Warped text lines and the smooth deformation between them are precisely modelled as primary and secondary flow lines that are then restored to their original linear shape. Preliminary, but representative, experimental results, in comparison to a leading page curl removal method and an industry-standard commercial system, demonstrate the effectiveness of the proposed method

Item Type:	Conference or Workshop Item (Paper)
Schools:	Schools > School of Computing, Science and Engineering
Publisher:	BibSonomy
Refereed:	Yes
Funders:	Funder not known
Depositing User:	Institutional Repository
Date Deposited:	10 Sep 2014 14:09
Last Modified:	27 Mar 2019 12:01
URI:	http://usir.salford.ac.uk/id/eprint/32287

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