基于字符亮度的自适应文本信息隐藏算法  

Adaptive Algorithm of Text Information Hiding Based on Character Intensity

作　　者：欧浪[1] 孙星明[1] 刘玉玲[1] 

机构地区：[1]湖南大学计算机与通信学院,湖南长沙410082

出　　处：《计算机应用研究》2007年第5期130-132,共3页Application Research of Computers

基　　金：国家自然科学基金资助项目(60373062;60573045);高校博士点基金资助项目(20050532007)

摘　　要：根据人类视觉系统(HVS),利用数字图像中的HSI模型,提出了一种基于字符亮度的自适应文本信息隐藏算法。该算法引入二次余数理论随机选择嵌入位置,并且采用了一种扩展的编码机制动态地隐藏秘密信息。实验结果表明这种算法不仅扩大了隐藏容量而且改善了文本的隐蔽性,同时在鲁棒性与不可感知性之间取得良好的折中,提高了文本的抗攻击能力。According to the human visible system, an adaptive algorithm for text information hiding was proposed. It is based on character intensity by using HS! model of the digital image processing. The quadratic residue theory was used for selecting randomly the embedding positions, and an extended coding scheme is utilizing for dynamically hiding secret messages. The experimental results show that the algorithm can not only enlarge the hiding capacity, but also improve the invisibility of the text, and be able to obtain the balances between the robustness and the imperceptivity so that it will have the resistant ability.

关 键 词：文本信息隐藏 自适应 色调 饱和度 亮度 二次余数 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]