基于小波域的第二代数字水印算法的研究  

Research on the Second Generation Digital Watermarking Algorithm Based on DWT Domain

作　　者：兰红星[1] 陈松乔[1] 胡爱娜[2] 李陶深[1] 

机构地区：[1]中南大学信息科学与工程学院,湖南长沙410083 [2]广西大学计算机与电子信息学院,广西南宁530004

出　　处：《电子学报》2007年第9期1799-1803,共5页Acta Electronica Sinica

基　　金：广西留学回国人员科学基金项目(No.桂科回0342001);广西科技攻关项目(No.桂科攻033008-9)

摘　　要：提出一种基于离散小波变换(DWT)域的第二代水印算法.该算法在CBWM模型基础上,把视觉系统掩蔽特性应用于水印的编码过程,引入了小波块的概念.算法首先从小波变换后的系数中提取出图像的重要特征值作为水印信息,然后通过调制将水印依次嵌入到图像的分解层中,最后该特征值在提取水印时作为位置参考点.实验结果表明,该水印算法对一般的几何攻击具有较强的鲁棒性,对旋转具有独特的抗干扰性.A new second generation watermarking method based on DWT was presented in the paper, Based on the model of CBWM,this algorithm applies the visual masking of HVS to the code of watermark.and introduces concept of wavelet block, At first,the algorithm extracts the most important image characteristic value from the coefficients of wavelet transformation as watermark information. And then, it embeds the watermark to decomposing layer of image by modulating. When extracting watermark, the characteristic value is acted as position reference point of watermark. Experiment results show that the watermarking algorithm is robust against common geometry attacks and special anti-interference resistance to rotation.

关 键 词：数字水印 离散小波变换 第二代水印 人眼视觉特性 小波块 几何攻击 

分 类 号：TN319[电子电信—物理电子学]