基于稀疏表示的密写编码  

Steganographic Encoding Based on Sparse Representation

作　　者：张新鹏[1] 王朔中[1] 

机构地区：[1]上海大学通信与信息工程学院,上海200072

出　　处：《电子学报》2007年第10期1892-1896,共5页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60502039);上海市科委基础研究重点项目(No.04JC14037);上海市青年科技启明星计划(No.06QA14022);上海市重点学科建设项目(No.T0102)

摘　　要：密写编码技术以占用较多的载体数据为代价来减少对载体数据的修改量,从而降低信息隐藏引起的失真.本文首先将密写编码方法的构造转化为一个数据的稀疏表示问题,然后提出密写编码构造算法.利用该构造算法可得到一系列密写编码方法,并进一步研究密写编码的组合形式,在不同占用率条件下获得了良好的编码性能,优于矩阵密写编码和游动密写编码.A data-hider can reduce the amount of alterations necessary to be introduced into a cover signal for data hiding by using stego-encoding techniques. In this paper, construction of the generalized stego-encoding technique is described in a form of sparse representation. With this representation, a series of stego-coding methods are obtained, among which the previously introduced matrix encoding may be viewed as a special case. It is then demonstrated that a suitable combination of different stego-encoding schemes can provide improved performance under a given ratio between the amount of host data and that of secret data, which is better than the performance of the matrix encoding and the running encoding schemes.

关 键 词：密写 编码 稀疏表示 

分 类 号：TP309.7[自动化与计算机技术—计算机系统结构]