一种抗JPEG压缩的大容量信息隐藏算法  

High Capacity Information Hiding Algorithm Resisting to JPEG

作　　者：谢建全[1,2] 谢勍[1] 黄大足[1,2] 阳春华[2] 

机构地区：[1]湖南财政经济学院信息管理系,湖南长沙410205 [2]中南大学信息科学与工程学院,湖南长沙410083

出　　处：《南京理工大学学报》2011年第2期257-261,272,共6页Journal of Nanjing University of Science and Technology

基　　金：国家自然科学基金(60574030)

摘　　要：为了提高信息隐藏应用中隐藏算法的隐藏容量和抗压缩能力,该文提出了一种在离散余弦变换(DCT)高频系数中嵌入信息的隐藏算法。分析了联合图像专家组(JPEG)的压缩不变性。嵌入的信息强度根据子块的平滑情况自适应地确定。实验结果表明,该算法能在满足不可感知的前提下提高隐藏容量,对不超过预设品质因子的有损压缩有强鲁棒性。实验结果还表明该算法有一定的抗噪声干扰的能力。In order to improve the hiding capacity and resistance to compression in a lot of information hiding algorithms,this paper proposes a hiding algorithm in which information is embedded in high frequency coefficients in discrete cosine transform（DCT）.Invariance properties of joint photographic experts group（JPEG） compression are analyzed.Information hiding capability is determined adaptively by the smoothing performance of child blocks so that hiding capacity is increased under the condition of invisibility.Experimental results show that this proposed algorithm has great robustness against loss compression within default quality factors and better ability against noise.

关 键 词：信息隐藏 隐藏容量 离散余弦变换 联合图像专家组 压缩不变性 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]