Watermarking for 3D NURBS graphic data

Author

Lee, Jae Jun ; Cho, Nam Ik ; Kim, Jong Weon

Author_Institution

Sch. of Electr. Eng., Seoul Nat. Univ., South Korea

fYear

2002

fDate

9-11 Dec. 2002

Firstpage

304

Lastpage

307

Abstract

In this paper, two watermarking algorithms for nonuniform rational b-spline (NURBS) are proposed. One is suitable for steganography, and the other for watermarking. Both algorithms do not directly embed data into the parameters of NURBS, but into the 2D virtual images extracted from the sampled points of 3D model. As a result, the proposed algorithm for steganography preserves the data size of the model and can embed more information than the conventional algorithm. Also, the watermarking algorithm can use any of existing 2D watermarking techniques when embedding data into the virtual 2D images. From the experiment, it is found that the algorithm is robust against the operations to knots and control points. It is also robust against the remodeling of NURBS model through approximation.

Keywords

cryptography; data encapsulation; image coding; splines (mathematics); watermarking; 2D virtual image; 2D watermarking technique; 3D NURBS graphic data; control point; data size; knots point; nonuniform rational b-spline; steganography; watermarking; Data mining; Graphics; Robust control; Shape control; Spline; Steganography; Surface reconstruction; Surface topography; Telephony; Watermarking;

fLanguage

English

Publisher

ieee

Conference_Titel

Multimedia Signal Processing, 2002 IEEE Workshop on

Print_ISBN

0-7803-7713-3

Type

conf

DOI

10.1109/MMSP.2002.1203306

Filename

1203306