基于混沌序列的脆弱数字水印算法  

Fragile Digital-watermark Algorithm Based on Chaotic Sequence

作　　者：曹家[1] 王轩[1] 

机构地区：[1]哈尔滨工业大学深圳研究生院,广东深圳518055

出　　处：《计算机工程》2011年第12期125-126,129,共3页Computer Engineering

摘　　要：为解决Yeung-Mintzer脆弱水印算法的安全性问题,提出一种基于混沌序列的水印算法。采用混沌序列对Yeung-Mintzer脆弱水印算法进行改进,得到更好的水印不可见性和篡改检测率,同时保留原算法运算速度快、检测定位能力强、盲检测等优点。理论分析和实验结果证明,该算法可以应用于法律证据图像、医疗图像等安全性和图像质量要求高的领域,有效地检测对图像的篡改部分。This paper proposes a new watermark algorithm based on the chaotic sequence to solve the security problems of Yeung-Mintzer algorithm and it has a significant improvement on the image invisibility and the tamper detection rate, while retains the other advantages. The method is intended for use in image verification applications, where one is interested in knowing whether and where the content of an image is altered maliciously. Theoretical analysis and experimental results prove that this algorithm has a great practicability and can be used for legal evidence image and medical image.

关 键 词：数字水印 脆弱 图像认证 拼贴攻击 篡改定位 

分 类 号：TN919.81[电子电信—通信与信息系统]