摘要： 提出一种基于离散小波变换(DWT)的3D点云模型数字水印算法。选取3D点云模型各点到模型重心距离值的一维DWT低频信号部分，进行水印信息的嵌入。实验结果表明，该算法嵌入数据量大，算法简单且容易实现，同时对仿射变换、重排序攻击、简化、剪切和噪声等变形攻击具有较强的鲁棒性。

关键词: 点云模型, 网格模型, 数字水印, 鲁棒性, 离散小波变换, 透明性

Abstract: A novel method which is based on Discrete Wavelet Transform(DWT) for digital watermark of a 3D point cloud model is presented. The distance of each vertex in the 3D model to the center point is calculated. The distance is transformed into a signal in frequency domain using one-dimensional DWT and the watermark is embedded in the low frequency of the signal in frequency domain. Experimental results show that the scheme is simple, efficient, easy to implement, and robust against attacks, such as affine transformation, resorting, simplification, cropping and nosing distortion.

Key words: point cloud model, mesh model, digital watermark, robustness, Discrete Wavelet Transform(DWT), invisibility

中图分类号: 

• TP309