Digital watermarking of polygonal meshes with linear operators of scale functions

作者：Choi Hyeong In; Kim Tae wan^*; Kwon Song Hwa; Moon Hwan Pyo; Park Sung Ha; Shin Heon Ju; Sohn Jung Kyo

来源：Computer-Aided Design, 2010, 42(3): 163-172.

DOI：10.1016/j.cad.2009.09.002

• Digital watermarking
• 3D mesh processing
• Digital signal processing
• Spectral decomposition

Digital watermarking is already used to establish the copyright of graphics, audio and text, and is now increasingly important for the protection of geometric data as well. Watermarking polygonal models in the spectral domain gives protection against similarity transformation, mesh smoothing. and additive random noise attacks However, drawbacks exist in analyzing the eigenspace of Laplacian matrices In this paper we generalize an existing spectral decomposition and propose a new spatial watermarking technique based on this generalization. While inserting the watermark, we avoid the cost of finding the eigenvalues and eigenvectors of a Laplacian matrix in spectral decomposition, instead we use linear operators derived from scaling functions that are generated from Chebyshev polynomials Experimental results sho

• 出版日期2010-3