Watermarking of Two-dimensional Engineering Graph Based on the Orthogonal Complete U-system

Authors:
CAI Zhanchuan;SUN Wei;XIONG Changzhen;QI Dongxu
Affiliations:
Zhongshan University, Guangzhou, China;Zhongshan University, Guangzhou, China;Zhongshan University, Guangzhou, China;Macao University of Science and Technology, Macao
Venue:
CAD-CG '05 Proceedings of the Ninth International Conference on Computer Aided Design and Computer Graphics
Year:
2005

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A semi-fragile watermarking algorithm for authenticating 2D CAD engineering graphics based on log-polar transformation

Computer-Aided Design

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Abstract

Engineering graph plays an important role in design and manufacture, such as architecture, machinery, manufacture, military and so on. However, almost no persons consider the security and copyright of two-dimensional engineering graph. A novel method for two-dimensional engineering graph watermark based U system is proposed in this paper. Watermarks generated by this technique can be successfully extracted even after rotated, translated, and scaling transformed.