期刊论文

Improved Steganography Algorithm Based on J-UNIWARD

中文

应用科学学报

0255-8297

2021

39

02

293-301

10.3969/j.issn.0255-8297.2021.02.011

国家自然科学基金（No.U1736121）； 中央高校自主科研项目GF后期资助；

本校为第一机构

为了进一步提高自适应隐写算法的安全性,本文引进图像分块的思想,改写了原J-UNWARD算法的失真函数,变加性失真函数为非加性失真函数。载体图像被分为4个子块,分别计算每个子块的纹理复杂度以嵌入总量不变为约束条件,优先嵌入复杂度较大的块,每嵌入一块完成后重新计算失真函数,根据复杂度大小动态调整每个子块的嵌入量。利用STC（syndrome trelliscodes）编码将秘密信息自适应地嵌入到纹理区域,最后采用DCTR和ccJRM两种隐写分析技术进行检测分析。实验结果表明:在相同容量下,改进算法能显著提高算法的抗隐写分析能力。

In order to further improve the security of adaptive steganography algorithms, this article introduces the idea of image blocking, rewrites the distortion function of the original J-UNIWARD algorithm, and changes additive distortion functions to non-additive distortion functions. The implementation process of the algorithm is as follows: The carrier image to be processed is divided into four sub-blocks, and the texture complexity of each sub-block is calculated separately, under the constraint of keeping total embedding amount unchanged. The more complex blocks are preferentially chosen to be ...