Jin Jian-Qiu, Dai Min-Ya, Bao Hu-Jun, Peng Qun-Sheng
State Key Laboratory of CAD & CG, AI Institute, Zhejiang University, Hangzhou 310027, China.
J Zhejiang Univ Sci. 2004 Mar;5(3):251-8. doi: 10.1007/BF02841008.
In this paper we propose a robust watermarking algorithm for 3D mesh. The algorithm is based on spherical wavelet transform. Our basic idea is to decompose the original mesh into a series of details at different scales by using spherical wavelet transform; the watermark is then embedded into the different levels of details. The embedding process includes: global sphere parameterization, spherical uniform sampling, spherical wavelet forward transform, embedding watermark, spherical wavelet inverse transform, and at last resampling the mesh watermarked to recover the topological connectivity of the original model. Experiments showed that our algorithm can improve the capacity of the watermark and the robustness of watermarking against attacks.
在本文中，我们提出了一种用于三维网格的鲁棒水印算法。该算法基于球面小波变换。我们的基本思想是通过使用球面小波变换将原始网格分解为不同尺度的一系列细节；然后将水印嵌入到不同层次的细节中。嵌入过程包括：全局球体参数化、球面均匀采样、球面小波正向变换、嵌入水印、球面小波逆变换，最后对加了水印的网格进行重采样以恢复原始模型的拓扑连通性。实验表明，我们的算法可以提高水印的容量以及水印对攻击的鲁棒性。
