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

fYear

2009

fDate

20-21 Sept. 2009

Firstpage

546

Lastpage

549

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/YCICT.2009.5382434

Filename

5382434