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Proceedings Paper

A restoration method for distorted image scanned from a bound book
Author(s): HyungSoo Ohk; HyunSeok Seo; KiMin Kang; Sangho Kim; DonChul Choi
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Paper Abstract

When a bound document such as a book is scanned or copied with a flat-bed scanner, there are two kinds of defects in the scanned image; the geometric and photometric distortion. The root cause of the defects is the imperfect contact between the book to be scanned and the scanner glass plate. The long gap between the book center and the glass plate causes the optical path from the surface of the book and the imaging unit(CCD/CIS) to be different from the optimal condition. In this paper, we propose a method for restoring bound document scan images without any additional information or sensor. We correct the bound document images based on the estimation of the boundary feature and background profile. Boundary Feature is obtained after calculating and analyzing the Minimum Boundary Rectangle which encloses the whole foreground contents with minimum size and the extracted feature is used for correcting geometric distortion; de-skew, warping, and page separation. Background profile is estimated from the gradient map and it is utilized to correct photometric distortion; exposure problem. Experimental results show effectiveness of our proposed method.

Paper Details

Date Published: 25 January 2011
PDF: 8 pages
Proc. SPIE 7866, Color Imaging XVI: Displaying, Processing, Hardcopy, and Applications, 78661T (25 January 2011); doi: 10.1117/12.876758
Show Author Affiliations
HyungSoo Ohk, Samsung Electronics Co., Ltd. (Korea, Republic of)
HyunSeok Seo, Samsung Electronics Co., Ltd. (Korea, Republic of)
KiMin Kang, Samsung Electronics Co., Ltd. (Korea, Republic of)
Sangho Kim, Samsung Electronics Co., Ltd. (Korea, Republic of)
DonChul Choi, Samsung Electronics Co., Ltd. (Korea, Republic of)


Published in SPIE Proceedings Vol. 7866:
Color Imaging XVI: Displaying, Processing, Hardcopy, and Applications
Reiner Eschbach; Gabriel G. Marcu; Alessandro Rizzi, Editor(s)

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