Title :
A fragile watermarking algorithm for T-Spline surfaces
Author :
Bin, Weng ; Ri-jing, Pan ; Zhi-qiang, Yao ; Jun, Xiao ; Shan-chao, Yang
Author_Institution :
Key Lab. of Network Security & Cryptology, Fujian Normal Univ., Fuzhou, China
Abstract :
T-Spline surface is an important parametric surface, which is widely used in entertainment, engineering, science and medicine. A fragile watermarking algorithm is proposed for integrity authentication of T-Spline surfaces. In this algorithm, some points on T-Spline surfaces are selected by a special algorithm, then the watermark is embedded by modifing the selected points, and then the watermarked surfaces is acquired by modifying the control points with constrained optimization method. The experiment results show that the watermark is fragile to many attacks, and the tampered area can be detected. Additionally, when preprocessing is used before watermark extracting, the algorithm can modified to be semi-fragile that is robust to translating, rotating and uniformly scaling.
Keywords :
computer graphics; optimisation; splines (mathematics); watermarking; T-Spline pre-image preprocessing; T-Spline surfaces; constrained optimization method; fragile watermarking algorithm; integrity authentication; tampered area detection; watermark embedding; Authentication; Computer networks; Cryptography; Laboratories; Optimization methods; Robustness; Spline; Surface reconstruction; Surface topography; Watermarking; T-Spline surfaces; constrained optimization method; fragile watermarking;
Conference_Titel :
Information, Computing and Telecommunication, 2009. YC-ICT '09. IEEE Youth Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-5074-9
Electronic_ISBN :
978-1-4244-5076-3
DOI :
10.1109/YCICT.2009.5382434
