Please use this identifier to cite or link to this item: https://doi.org/10.1109/CVPR.2005.11
Title: 3D geometric and optical modeling of warped document images from scanners
Authors: Zhang, L. 
Zhang, Z. 
Tan, C.L. 
Xia, T. 
Issue Date: 2005
Source: Zhang, L.,Zhang, Z.,Tan, C.L.,Xia, T. (2005). 3D geometric and optical modeling of warped document images from scanners. Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition 1 : 337-342. ScholarBank@NUS Repository. https://doi.org/10.1109/CVPR.2005.11
Abstract: When one scans a document page from a thick bound volume, the curvature of the page to be scanned results in two kinds of distortion in the scanned document images: i) shade along the 'spine ' of the book, ii) warping in the shade area. In this paper, we propose an efficient restoration method based on the discovery of the 3D shape of a book surface from the shading information in a scanned document image. We first build practical models namely a 3D geometric model and a 3D optical model for the practical scanning conditions to reconstruct the 3D shape of book surface. We next restore the scanned document image using this shape based on de-shading and dewarping models. Finally, we evaluate the restoration results by comparing the OCR (Optical Character Recognition) performance on the original and restored document images. The experiments show that the geometric and photometric distortions are mostly removed and the OCR results are improved markedly. © 2005 IEEE.
Source Title: Proceedings of the IEEE Computer Society Conference on Computer Vision and Pattern Recognition
URI: http://scholarbank.nus.edu.sg/handle/10635/43245
ISBN: 0769523722
ISSN: 10636919
DOI: 10.1109/CVPR.2005.11
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