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Proceedings Paper

A geometric distortion correction method for lithographic watermarked authentication images
Author(s): Yong Xie; Juan Li; Juan-juan Wang; Chuan-yong Liu
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Paper Abstract

The anti-counterfeiting watermarked images of lithographic prints must be transformed into digital images by scanner or camera before authenticating. The obtained images usually happen to geometric distortion so as to influence the watermark extraction. A geometric distortion correction method for the lithographic watermarked authentication images is proposed in this paper. Hough transform is used to detect the edge lines or corner points, and then unites with the nature of the oblique distortion or the perspective transformation model to correct the distortion. Finally, morphological filtering is used to revise the corrected images. Experiments results demonstrate the method can correct the geometric distortion well and the watermarking image can be extracted and clear enough to authentication.

Paper Details

Date Published: 10 January 2014
PDF: 5 pages
Proc. SPIE 9069, Fifth International Conference on Graphic and Image Processing (ICGIP 2013), 906908 (10 January 2014); doi: 10.1117/12.2050051
Show Author Affiliations
Yong Xie, Hunan Univ. of Technology (China)
Juan Li, Hunan Univ. of Technology (China)
Juan-juan Wang, Hunan Univ. of Technology (China)
Chuan-yong Liu, Hunan Univ. of Technology (China)

Published in SPIE Proceedings Vol. 9069:
Fifth International Conference on Graphic and Image Processing (ICGIP 2013)
Yulin Wang; Xudong Jiang; Ming Yang; David Zhang; Xie Yi, Editor(s)

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