摘要： 为提高一重三维模型数字水印的安全性，提出一种基于三维网格模型的双重数字盲水印算法。通过改变三角网格顶点在其一环相邻顶点所确定的局部几何空间中的位置和三角面片顶点排列顺序，嵌入双重水印，使模型能抵抗严重的剪切攻击及一定程度的噪声攻击。算法在提取水印时无需原始模型。仿真结果表明，该算法能够有效抵抗平移、旋转、均匀缩放、顶点乱序、多边形乱序及剪切等攻击，具有嵌入可读水印的不可见性。

关键词: 双重数字水印, 三角网格, 局部空间, Nielsen范数, Arnold置乱, 盲检测

Abstract: A robust dual digital blind watermark is proposed based on three-dimensional mesh model in order to solve the weakness of the single watermark’s difficulty to resist against various attacks. The scheme embeds the watermark by modifying the location of vertices in their related space and topological information of 3D mesh, which makes the model resist not only large scaled cropping operation but also high strong noising. With this approach, the original model is not required during detecting watermarks. Experimental results show that the algorithm has good visualizing quality and robustness which can be against the attacks such as translation, rotation, scaling, model cropping and vertex permutation etc.

Key words: dual digital watermark, triangular mesh, local space, Nielson norm, Arnold scrambling, blind detection

中图分类号: 

• TP309