Abstract:In order to extend attack resistance types of digital watermark in threedimensional models and improve the robustness against simplification, cropping and combination attacks, a new nonblind watermarking scheme based on vertex norm in spatial domain was proposed. During watermark embedding, the normalized vertex sets of 3D models were built, and the vertex norms in these vertex sets were modified to embed watermark by changing the proportion of vertices satisfying specified conditions. During watermark detecting, the number of vertices satisfying the given conditions in detected model and original model were counted respectively and compared to extract watermark. The existence of original watermark was verified by correlation test. The algorithm was implemented based on VC++, and experimental analysis on transparency and robustness were completed by bunny and horse model of Stanford. The results show that the watermark embedded by the scheme has enough imperceptibility, and is not affected by translation, rotation, uniform scaling and vertex reordering. The good robustness against noise, simplification, cropping, quantization, smoothing, subdivision and combination attacks is also achieved.
王新宇, 詹永照. 基于顶点范数的三维模型鲁棒数字水印算法[J]. 江苏大学学报(自然科学版), 2011, 32(6): 695-700.
WANG Xinyu, ZHAN Yongzhao. A robust watermarking scheme for 3D models based on vertex norm
[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2011, 32(6): 695-700.