三维网格模型零水印技术

为解决网格模型水印算法中水印鲁棒性与透明性之间的矛盾,提出了一种适用于任意拓扑连通结构的网格模型零水印算法。水印由网格的几何数据经过空域特征提取及变换域能量集中后生成。实验结果表明:算法构造的水印不仅能抵抗顶点重排序、平移、旋转、各向一致缩放等攻击,而且对加噪、网格简化攻击也表现出较好的鲁棒性。

Zero-watermarking technique of three-dimensional meshes

In order to compromise the robustness and transparency of watermarked 3D meshes,proposed a zero-watermarking algorithm could be used in meshes with any topological connectivity.Watermarking signal was constructed by geometric data of mesh,after geometric feature extracting in spatial domain and energy's convergence in transformed domain.Experimental results show the watermark constructed by proposed algorithm can resist vertex reordering,translating,rotating,uniformed scaling,and show good robustness against adding noise and mesh simplifying.