应用科学学报 ›› 2015, Vol. 33 ›› Issue (3): 290-298.doi: 10.3969/j.issn.0255-8297.2015.03.007

• 信号与信息处理 • 上一篇    下一篇

基于新的失真代价函数的自适应JPEG隐写

徐淼1, 程航1,2, 余江1, 张新鹏1   

  1. 1. 上海大学通信与信息工程学院,上海200444
    2. 福州大学数学与计算机科学学院,福州350108
  • 收稿日期:2014-12-03 修回日期:2014-12-16 出版日期:2015-05-30 发布日期:2014-12-16
  • 作者简介:张新鹏,教授,博导,研究方向:多媒体信息安全、医学图像处理等,E-mail:xzhang@shu.edu.cn
  • 基金资助:

    国家自然科学基金(No.61472235);上海市浦江人才计划基金(No.13PJ1403200);上海市东方学者专项
    基金资助

Adaptive JPEG Steganography Based on New Distortion Cost Function

XU Miao1, CHENG Hang1,2, YU Jiang1, ZHANG Xin-peng1   

  1. 1. School of Communication and Information Engineering, Shanghai University,
    Shanghai 200444, China
    2. College of Mathematics and Computer Science, Fuzhou University,
    Fuzhou 350108, China
  • Received:2014-12-03 Revised:2014-12-16 Online:2015-05-30 Published:2014-12-16

摘要: 为了提高隐写的安全性,提出了基于一种新失真代价函数的自适应JPEG 隐写算
法. 考虑到纹理区域更有利于信息嵌入,本算法通过非零量化DCT 系数的绝对值加权和来
度量DCT 子块的纹理程度,并引入均匀嵌入思想,设计出了一种新的失真代价度量函数;同
时利用STC(syndrome trellis codes)编码将嵌入修改均匀地分散在任意数量级的非零量化
DCT 系数上,实现了秘密信息自适应地嵌入到载体的纹理区域中. 实验结果表明,在同等低
嵌入率下,该方法的安全性优于同类隐写算法.

关键词: 失真代价函数, 量化DCT 系数, STC 编码, 隐写

Abstract: To improve security of steganography, this paper proposes an adaptive steganographic
scheme for JPEG images based on a new distortion cost function. As texture areas
in a cover image are more suitable for information embedding, the sum of absolute values
of all non-zero quantized DCT coefficients in a DCT block is used to measure texture of
the block. Combining the previous uniform embedding scheme, a new distortion cost function
is defined. With syndrome trellis codes, embedding modification spreads uniformly
over DCT coefficients of all possible magnitudes, embedding secret data adaptively into
the texture areas in the cover. Experimental results show that the proposed scheme out
performs the prior arts in terms of security with the same low payload.

Key words:  distortion cost function, quantized DCT coefficient, syndrome trellis codes, steganography

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