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Restoration of Arbitrarily Warped Historical Document Images Using Flow Lines Maryam Rahnemoonfar and Apostolos Antonacopoulos
 

Summary: Restoration of Arbitrarily Warped Historical Document Images Using Flow Lines
Maryam Rahnemoonfar and Apostolos Antonacopoulos
Pattern Recognition and Image Analysis (PRImA) Research Lab
School of Computing, Science and Engineering, University of Salford, United Kingdom
E-mail: rahnemoonfar@ieee.org, a.antonacopoulos@primaresearch.org
Abstract1
--Historical documents frequently suffer from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 information 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

  

Source: Antonacopoulos, Apostolos - School of Computing, Science and Engineering, University of Salford

 

Collections: Computer Technologies and Information Sciences