面向图像分存的批量隐写算法研究  

Batch Steganographic Algorithm for Image Sharing

作　　者：陈够喜[1,2] 伍玉良[1] 陈俊杰[2] 沈红雷[1] 

机构地区：[1]中北大学电子与计算机科学技术学院,山西太原030051 [2]太原理工大学计算机与软件学院,山西太原030024

出　　处：《中北大学学报（自然科学版）》2011年第6期738-745,共8页Journal of North University of China(Natural Science Edition)

基　　金：国家自然科学基金资助项目(60773004);山西省科技攻关项目(20090322004)

摘　　要：针对数字图像隐写的安全性差和嵌入容量小的问题,基于B ernste in多项式变换和K-L散度,提出了结合图像分存的批量隐写算法,实现了双重载体隐写.首先证明了B ernste in多项式的次算子与对应函数的逼近性,得到了分存图像的最大有效载荷与分存算子数的关系式,论述了该批量隐写系统的安全约束条件.然后说明了图像分存与复原的方法,并利用分解后的子图进行批量隐写,实现图像分存,最后对该算法的安全性进行了分析.实验结果与分析表明该算法安全,满足C ach in的安全性定义,有助于隐写系统的设计和分析.Digital image steganography suffers from poor security and small embedded capacity.Based on Bernstein polynomial transform and K-L divergence,a batch steganographic algorithm for image sharing was proposed to achieve double covers information hiding.Bernstein polynomial and the approximation of nth operator was proved,relationship between maximum payload of sharing image and sharing operator was obtained,and security constraints of batch stegosystem were discussed.The approach to image sharing and recovering was studied completing image sharing in decomposed sub-graphs.The security of the algorithm was analyzed.The experimental results showed that the steganographic method satisfies Cachin＇s definition of security.

关 键 词：信息隐藏 图像分存 批量隐写 隐写分析 安全性 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]