基于小波变换的低频数字水印嵌入算法  

A kind of watermarking algorithm based on wavelet transform

作　　者：吕振肃[1] 应隽[1] 李宏[1] 

机构地区：[1]兰州大学信息科学与工程学院,甘肃兰州730000

出　　处：《兰州大学学报（自然科学版）》2004年第6期39-42,共4页Journal of Lanzhou University(Natural Sciences)

基　　金：甘肃省自然科学基金资助项目(ZS011-A25-016-G).

摘　　要：提出了一种基于小波变换低频系数的数字水印嵌入和检测算法.二值水印首先经过Arnold变换后再嵌入在原始图像的低频部分,仍能保持良好的视觉效果,进一步证明了低频部分不是水印的禁区.实验结果表明该算法有较好抗JPEG压缩、低通滤波等攻击的能力.A new watermarking algorithm is proposed in the paper and watermarks were embedded in the low-frequency subband after multiresolution decomposition, which proved that a low-frequency subband is not a forbidden zone. Experiments showed that the algorithm in this paper could resist damage from JPEG compression, random noising and cropping attacks.

关 键 词：小波变换 数字水印 扩频 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术]