基于三元组系数关系的多小波域数字水印算法  

Digital watermarking algorithm based on triplets of coefficients in multiwavelet domain

作　　者：李国良[1] 谭月辉[1] 齐京礼[2] 陈建泗[2] 李志勇[2] 

机构地区：[1]军械工程学院计算机工程系,石家庄050003 [2]军械工程学院训练部,石家庄050003

出　　处：《信息技术》2011年第1期81-84,共4页Information Technology

摘　　要：利用图像经CARDBAL多小波变换后,低频系数的能量平均分配于四个子图上这一特点,从四个子图中任选三个子图,用其系数组成三元组,通过调整三元组的标准差来嵌入水印信息并实现盲提取。实验结果表明,算法不但保证了含水印图像有较高的不可感知性,而且对JPEG压缩、噪声、剪切、旋转等攻击具有较好的鲁棒性。A new robust watermarking scheme based on triplets of multiwavelet coefficients is proposed.Because after CARDBAL multiwavelet transform,the energy of the lowest resolution subimage of an image will spread in average among its four components.The scheme modifies the standard deviation of triplets which were selected from the 4 lowest resolution subimage,according to a sequence of information bits.And it realizes the blind watermark detection.The experimental results show that the degradation caused by the proposed scheme is slight,and this watermarking scheme is very robust to common image processing and malicious attack.

关 键 词：数字水印 多小波 标准差 三元组 

分 类 号：TP301[自动化与计算机技术—计算机系统结构]