基于点半径均值的三维模型数字水印算法  

A Watermarking Scheme Based on Mean Values of Vertices' Radius in 3D Models

作　　者：陈海霞[1] 黄立慧[2] 卢宇[3] 

机构地区：[1]福建师范大学协和学院,福建福州350117 [2]福州大学至诚学院,福建福州350002 [3]福建师范大学物理与能源学院,福建福州350117

出　　处：《福建师范大学学报（自然科学版）》2015年第4期24-30,共7页Journal of Fujian Normal University：Natural Science Edition

基　　金：福建省科技计划重点项目(2012H0021);福建省教育厅资助项目(JA12064)

摘　　要：提出一种基于三维模型点云半径均值的盲水印算法,算法通过利用顶点集球面坐标系下两个角度将三维模型划分成多个子区域,再经过修改子区域中部分顶点坐标,使子区域半径均值与全局半径均值之间产生关联,从而嵌入水印.该算法对于几何变换和剪切、噪声攻击等都具有较好的鲁棒性.A new blind watermarking scheme for 3 D models based on mean values of vertices＇ radius was proposed. Firstly, vertices of the models were converted from cartesian coordinate into spherical coordinate. Secondly, they were divided into several subsets. After having expanded the vertices＇ values of subsets, the mean values of subsets were associated with the mean value of both of all vertices. Lastly, watermark was embedded to the models. Simulation results had showed that the scheme was robust to both common geometric and removal attacks.

关 键 词：数字水印 三维模型 球面坐标 半径均值 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]