基于三维网格模型的双重数字盲水印算法  

Dual Digital Blind Watermark Algorithm Based on Three-dimensional Mesh Model

作　　者：唐斌[1] 康宝生[1] 王国栋[1] 康健超[1] 赵建东[1] 

机构地区：[1]西北大学信息科学与技术学院,西安710127

出　　处：《计算机工程》2012年第6期119-122,共4页Computer Engineering

基　　金：陕西省自然科学基础研究计划基金资助项目(2005A14)

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。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.

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 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]