基于DCT中频的三维数字水印算法  

DCT Intermediate Frequency Based Digital Watermarking Algorithm for 3D Models

作　　者：周广新[1] 葛华[1] 

机构地区：[1]安徽科技学院,安徽凤阳233100

出　　处：《河北北方学院学报（自然科学版）》2015年第4期33-35,共3页Journal of Hebei North University:Natural Science Edition

基　　金：安徽科技学院青年科学研究基金项目(ZRC2013331)

摘　　要：提出一种基于DCT中频的三维模型数字水印算法。算法利用三维网格模型的中心到各个顶点的距离来负载水印,首先,对距离值序列进行一维DCT变换转换到频域,在变换中选择中频系数来负载水印,然后,再进行逆向DCT变换,转换到空域。实验结果表明该算法具有较好的透明性,并且实现简单,对噪声攻击、网格简化攻击、裁剪攻击具有较好的鲁棒性。This paper puts forward a digital watermarking algorithm for 3D models based on DCT in-termediate frequency.The algorithm used the distances between the center of the model and the vetice on the 3D model surface.First,we transform the sequence of distance to signal in frequency domain using one-dimensional DCT.Then we embed watermark into the intermediate frequency coefficients of signal, and then transform the digital signal back to spatial domain using inverse DCT.Experiments show that this algorithm has beter transparency,and is simple to implement,and robust against mesh simplifica-tion,cropping,random noise and so on.

关 键 词：三维数字水印 DCT中频 网格水印 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]