关键词: 数字水印, 鲁棒, 几何特征, 三维网格模型

Abstract: This article proposes a robust watermarking scheme for three-dimensional triangle meshes.First，the 3D mesh model is affine transformed into a new 3D model ，which is robustness to translation，rotation and scaling.Second，the distance of each vertex in the mesh to the origin of the mesh is calculated，and the real number sequence of distance is transformed to a signal in frequency domain using one-dimensional discrete cosine transform（DCT）.A watermark is embedded into the signal in frequency domain，and the embedded watermark is imperceptible.Experimental results show the proposed method is not only robust to affine attack，but also robust against common mesh attacks such as mesh simplification，mesh cropping，random noise added and combined attacks.

Key words: watermarking, robust, geometry property, 3D mesh model