电力设备三维网格模型自适应鲁棒水印算法-地球信息科学学报.pdf

20 11 年 12 月 电 工 技 术 学 报 Vol.26 No. 12 第 26 卷第 12 期 TRAN SACTION S OF CHINA ELECTROTECHNICAL SOCIETY Dec. 20 11 电力设备三维网格模型自适应鲁棒水印算法 朱少敏 1,3 刘建明2 （1．中国电力科学研究院 北京 100 192 2 ．国网信息通信有限公司 北京 10076 1 3 ．北京市电力 公司变电公司 北京 100054） 摘要 提出 种新的电力设备三维网格模型鲁棒水印算法，介绍了该算法在电力多媒体信 息安全中的应用。该算法首先对电力设备三维网格模型进行离散曲率估计，找出模型中脐点 ； 结合网格模型离散法向量和局部粗糙度，通过自适应主方向投影实现水印嵌入。实验结果表明， 该水印算法能有效抵抗加性噪声、仿射变换、网格简化、网格剪切等多种网格变换和攻击，具 有较强的不可感知性和鲁棒性。 关键词：电力设备 脐点 离散法向量 局部粗糙度 中图分类号：TP309 Electric Power Equipment 3D Mesh Model Adaptive Robust Watermarking Algorithm Zhu Shaomin 1,3 L iu J ianming2 （1．China Electric Power Research Institute Beij ing 100 192 China 2 ．State Grid Information Telecommunication Co., Ltd. Beij ing 10076 1 China 3 ．Power Substation Company of Beij ing Electric Power Company Beij ing 100054 China ） Abstract A novel robust watermarking algorithm for electric power equipment is proposed and its applications in power system multimedia information security are presented. Firstly, some umbilical points are found by analyzing the discrete curvatures estimation of 3D mesh model. Combining the vertex discrete normal vector and local roughness of the mesh model, the watermark information is adaptively embedded into electric power equipment 3D mesh model by proj ecting the vertex positions of robust umbilical points along the principal directions. Experimental results show that the proposed mesh watermarking can resist various mesh operations and attacks such as additive noise, affine transform, mesh simplification, and mesh cropping, and therefore possesses strong imperceptibility and robustness. Keywords ：El