基于全局几何特征的三维模型数字水印算法  

Geometric Feature Based Digital Watermarking Algorithm for 3D Models

作　　者：张小梅[1] 刘泉[1] 

机构地区：[1]武汉理工大学信息工程学院,武汉430070

出　　处：《武汉理工大学学报》2007年第12期123-126,共4页Journal of Wuhan University of Technology

基　　金：高等学校博士点基金(20060497005);国家自然科学基金(50620130441);湖北省数字重点实验室开放基金(SZ0609)

摘　　要：提出一种基于全局几何特征的三维模型数字水印算法。算法利用三维网格模型顶点到模型中心的距离构成体现模型全局几何特征的顶点模值矩阵作为水印载体,用奇异值分解的方法将水印嵌入顶点模值矩阵,获得含水印的三维模型。实验结果表明,提出的数字水印算法具有很好的鲁棒性和可操作性,具有很好的应用前景。A novel geometric feature based digital watermarking algorithm for 3D models was proposed in this paper. The presented algorithm used the distances between the vetice on the model surface and the center of the model to constitute the vetice module matrix which embodies the global geometric features of the whole model. On this basis, the SVD method could be used to embed watermarks into the vetice matrix. Then the 3D mesh models could be recovered from the watermarked vertice modular matrix, and the watermark spreads all over the mesh model. The experiment results presented in the paper indicates that the algorithm shows robustness, feasibility and has promising prospects.

关 键 词：数字水印 顶点模值矩阵 奇异值分解 三维模型 版权保护 

分 类 号：TN911.73[电子电信—通信与信息系统]