Robust Watermarking for T-spline Surfaces Based on Nonuniform B-spline Wavelets Transformation
T-spline surfaces are widely used in entertainment, engineering, science and medicine. Nonuniform B-spline wavelets transformation is introduced into T-spline surfaces watermarking, and a scheme is proposed for embedding watermarks into T-spline surfaces. In watermark embeding stage, firstly, the points are selected from the standard Tspline surfaces. Secondly, the points are decomposited by nonumiform B-spline wavelets transformation, then the watermarks are embedded into its lower resolution coefficients, and then the watermarked points are obtained by the B-spline wavelets reconstruction. Finally, the watermarked T-spline surfaces are obtained by modifing the T-spline control points. In watermark extracting stage, the same points selection and wavelets decomposition processes are performed to both the original surfaces and the watermarked surfaces, then the watermarks are obtained according to the differences of their lower resolution coefficients. Experimental results show that the proposed scheme is robust against attacks such as translation, rotation, uniform scaling, noise addition, control points modification, weights modification, local knot insertion and control point removal.
T-spline watermarking B-spline wavelets transform
Weng Bin Pan Ri-jing Yao Zhi-qiang Xiao Jun Yang Shan-chao
Key Laboratory of Network Security and Cryptology Fujian Normal University Fuzhou 350007, China Graduate University of the Chinese Academy of Sciences
国际会议
2010 IEEE Youth Conference on Information,Computing and Telecommunications(2010 IEEE青年信息、计算和通信技术大会)
北京
英文
335-338
2010-11-28（万方平台首次上网日期，不代表论文的发表时间）