自适应于局部几何特征的三维模型水印算法  

A Robust Watermarking Scheme for 3D Models

作　　者：喻志强[1] 赵荣椿[1] 叶豪盛[2] 梁爽[3] 

机构地区：[1]西北工业大学,西安710072 [2]香港城市大学电脑科学系 [3]空军工程大学电讯工程学院,西安710077

出　　处：《计算机工程与应用》2002年第22期23-27,共5页Computer Engineering and Applications

基　　金：博士创新基金资助项目(编号:G14013)

摘　　要：文章针对三维模型提出了一种稳健的三角网格数字水印算法,通过修改从模型中心到各顶点的向量长度来嵌入数字水印。该算法具有如下特点:以全局几何特征作为嵌入对象;将一比特的水印信息分布到整个模型之中;水印的嵌入强度自适应于模型的局部特征。实验结果表明该水印算法能抵抗网格简化攻击,噪声攻击,剪切攻击,以及它们的混合攻击,具有很高的稳健性。In this paper the authors propose a robust3D model watermarking scheme for triangle meshes.The approach embeds watermark information by modifying the length of the vectors that link vertices to the centre of the model.Particularly,the approach is able distribute information corresponds to a bit of the watermark over the entire model,the embedding primitive is a global character and the strength of the watermark signal is adaptive with respect to the local geometry of the model.Experiments show that this watermarking scheme is robust against attacks such as mesh simplification,addition of noise,model cropping and combined attacks.

关 键 词：自适应 局部几何特征 三维模型 三解网格 数字水印算法 多媒体信号处理 版权保护 

分 类 号：TN911.73[电子电信—通信与信息系统] D923.41[电子电信—信息与通信工程]