一种自适应的奇偶量化水印算法  

Adaptive odd-even quantization watermarking algorithm

作　　者：陈利[1] 何选森[1] 赵天娇[1] 

机构地区：[1]湖南大学计算机与通信学院,长沙410082

出　　处：《计算机工程与应用》2011年第35期203-205,248,共4页Computer Engineering and Applications

基　　金：湖南省湘潭市科技计划项目(No.ZJ20071008)

摘　　要：数字水印是数字媒体版权保护的一种有效方法。提出了一种自适应的奇偶量化水印算法,其量化步长由Watson模型和JPEG量化表共同确定,并通过二者自适应地调节量化步长。水印在DCT的中频系数中嵌入,由于采用奇偶量化,水印提取方法简单。实验结果表明,该算法具有良好的不可见性,算法简单,并能抵抗常规的图像处理和噪声攻击,具有很强的鲁棒性。Watermarking is an effective method of multi-media copyright protection.This paper proposes a novel odd-even quantization watermarking algorithm, the quantization step is adaptively determined and controlled by Watson model and JPEG quantization table.The watermark is embedded in the mid-frequency coefficients of DCT.Because of odd-even quantiza- tion, watermark can be exacted very easily.Experimental results show the algorithm has good invisibility, and is robust to some common image processing and noise attacks.

关 键 词：数字水印 奇偶量化 WATSON模型 JPEG量化表 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]