Sciweavers

Share
CVPR
2005
IEEE

3D Geometric and Optical Modeling of Warped Document Images from Scanners

10 years 3 months ago
3D Geometric and Optical Modeling of Warped Document Images from Scanners
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.
Li Zhang, Zheng Zhang 0003, Chew Lim Tan, Tao Xia
Added 12 Oct 2009
Updated 29 Oct 2009
Type Conference
Year 2005
Where CVPR
Authors Li Zhang, Zheng Zhang 0003, Chew Lim Tan, Tao Xia
Comments (0)
books