计算机工程

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基于不同扫描顺序差值的可逆信息隐藏算法

刘 俊1a,2,杨任尔1a,1b ,万旭东1a   

  1. (1. 宁波大学a. 信息科学与工程学院; b. 通信技术研究所,浙江宁波315211;2. 浙江省移动网应用技术重点实验室,浙江宁波315211)
  • 收稿日期:2014-04-17 出版日期:2015-03-15 发布日期:2015-03-13
  • 作者简介:刘 俊(1991 - ),男,硕士研究生,主研方向:信息隐藏算法;杨任尔,副教授;万旭东,学士。
  • 基金项目:
    国家科技重大专项基金资助项目(2011ZX03002-004-02);浙江省重点科技创新团队基金资助项目(2012R10009-04);浙江省 杰出青年科学基金资助项目(R1110416);教育部高等学校博士学科点专项科研基金资助项目(20113305110002);浙江省信息与通信工 程重中之重学科开放基金资助项目(XKXL1302);宁波市科技创新团队基金资助项目(2011B81002)。

Reversible Information Hiding Algorithm Based on Difference Value of Different Scanning Order

LIU Jun 1a,2,YANG Ren’er 1a,1b ,WAN Xudong 1a   

  1. (1a. College of Information Science and Engineering;1b. Institute of Communication Technology,Ningbo University,Ningbo 315211,China;2. Key Laboratory of Mobile Internet Application Technology of Zhejiang Province,Ningbo 315211,China)
  • Received:2014-04-17 Online:2015-03-15 Published:2015-03-13

摘要: 为实现敏感图像的大容量可逆信息隐藏,提出一种基于图像相邻像素差值的大容量无损隐藏算法。通过将图像分块,对每个分块按照不同的扫描顺序计算差值,对差值序列进行比较,选取最优扫描顺序生成的差值直方图。从差值直方图中选取2 个最大峰值点,每个峰值点选取最近的多个零值点,在峰值像素点插入多位秘密信息,从而实现图像大容量的可逆信息隐藏。仿真结果表明,该算法能根据不同分块图像的像素分布动态选择最优扫描顺序,且利用双峰值多零点嵌入,在嵌入隐秘信息后的峰值信噪比相差不大的情况下,可大幅提高隐写容量。

关键词: 分块图像, 双峰值和多零值, 扫描顺序选择, 相邻像素差, 直方图修改, 可逆信息隐藏

Abstract: In order to achieve high capacity reversible sensitive image information hiding,this paper presents a lossless hiding algorithm of high capacity based on the difference between adjacent pixels for image. By the image block,and difference value of each block is calculated by different scanning order,choosing the difference value histogram of best scan order by comparing difference value sequence. Select the two largest peak points from the differerce histogram,and the nearest multiple zero points in each peak point,and insert several bit secret information in pixel of peak point,which achieves high capacity reversible image lnformation hiding. The results of simulation experiment show that the algorithm can select the best scan order by pixels distribution of each block image dynamically and using two peaks and multiple zero to embed secrets. It improves capacity of embedding secret information greatly, besides PSNR is ideal after embedding secret information.

Key words: block image, double peak and multi-zero value, scan order selection, adjacent pixel difference, histogram modification, reversible information hiding

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