基于DFT的鲁棒三维网格模型数字水印算法

论文提出了一种基于离散傅立叶变换(DFT)的鲁棒三维网格数字水印嵌入算法,该算法首先将模型中心到顶点的长度进行DFT变换,然后通过修改DFT系数的模来嵌入水印。算法以全局特征作为嵌入对象,并且将1位水印信息分布到整个模型之中。实验结果表明该算法能够抵抗网格简化、加噪声、剪切等类型攻击以及它们的混合攻击,具有很好的鲁棒性。

DFT Based Robust Digital Watermarking Algorithm for 3D Mesh Model

In this paper,we propose a robust digital watermarking algorithm for 3D mesh model based on Discrete Fourier Transform(DFT).The algorithm applies firstly the DFT to distances between the center of mesh and the vertices,and then embeds the watermark into the host by modifying the magnitudes of DFT coefficients.Particularly,the proposed approach is able to distribute information corresponds to a bit of the watermark over the entire model,and the embedding primitive is a global character of mesh.Experimental results show that this watermarking scheme is robust against attacks such as mesh simplification,addition of noise,model cropping,and combined attacks.