DWT域的自适应重复水印技术  

An Adaptive Watermark Algorithm in DWT Using Multi-Embedding

作　　者：陈鹤峰[1] 曾文曲[1] 聂笃宪[1] 

机构地区：[1]广东工业大学应用数学学院,广东广州510090

出　　处：《微机发展》2005年第4期109-111,共3页Microcomputer Development

基　　金：广东省基金项目[(2003)32475]

摘　　要：鲁棒性和隐藏性是水印技术的关键。文中提出了数字水印DWT域的重复嵌入算法,即将一位水印信息叠加NVF后,多次重复嵌入到原始图像DWT系数的直流、中频和低频系数中。一般水印提取算法是嵌入算法的逆运算,文中根据嵌入二值水印的特点采用了符号判别法。实验结果表明,该水印算法具有很强的隐藏性和抗攻击的鲁棒性。Robustness and hiding are the key technologies of watermarking technology. A watermarking algorithm using multi-embedding is proposed in DWT. Let one watermark pixel with NVF embed a DWT block many times into DC, mid, low frequency. Not reversing the embedding, it adds all coefficients in the same block in DWT. By judging the sign of the sum, get the last mark. The experimental results show that the watermarking algorithm has strong hiding and robustness for anti-attack.

关 键 词：数字水印 DWT 重复嵌入 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]