A Double Layered “Plus-Minus One” Data Embedding Scheme
A Double Layered “Plus-Minus One” Data Embedding Scheme
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DOI：
10.1109/lsp.2007.903255
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发表时间：
2007-10
影响因子：
3.9
通讯作者：
Weiming Zhang;Xinpeng Zhang;Shuozhong Wang
中科院分区：
文献类型：
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作者：
Weiming Zhang;Xinpeng Zhang;Shuozhong Wang
在图像隐写术中，一个像素可以通过选择在灰度值上加/减1来携带秘密比特。这种“加密写”可以隐藏比简单的LSB嵌入更长的消息。我们提出了一种实现“plusmn1隐写”的双层嵌入方法，其中使用二进制覆盖码和湿纸码分别在LSB平面和第二层LSB平面隐藏消息。研究表明，当所采用的二进制覆盖码达到LSB隐写的嵌入效率上界时，该方法可以达到“plusmn1”隐写嵌入效率的上界。使用随机和结构化覆盖码的应用表明，新方法优于以往的方法，可以逼近上界。
In image steganography, a pixel can carry secret bits by choosing adding/subtracting one to/from the gray value. This kind of "plusmn1 steganography" can hide a longer message than simple LSB embedding. We propose a double-layered embedding method for implementing "plusmn1 steganography," in which binary covering codes and wet paper codes are used to hide messages in the LSB plane and the second LSB plane, respectively. We show that this method can achieve the upper bound on the embedding efficiency of "plusmn1 steganography" when the employed binary covering codes reach the upper bound on that of LSB steganography. Applications using random and structured covering codes show that the new method outperforms previous ones and can approach the upper bound.