一种基于差值直方图的自适应可逆信息隐藏方案  

An Adaptive Reversible Information Hiding Scheme Based on Difference Histogram

作　　者：符艳军 孙开锋[2] FU Yan-jun;SUN Kai-feng(Xi’an International University,Xi’an 710077,China;Xi’an Precision Machinery Institute,Xi’an 710077,China)

机构地区：[1]西安外事学院,西安710077 [2]西安精密机械研究所,西安710077

出　　处：《火力与指挥控制》2021年第9期72-77,共6页Fire Control & Command Control

基　　金：陕西省自然科学基金(2020JM-637);西安外事学院高层次人才启动基金资助项目(XAIU2019011)。

摘　　要：利用公共网络进行保密数据的隐蔽传输是网络情报战的核心内容,利用一般自然图像相邻像素之间灰度值的强相关性,基于差值直方图和直方图平移,提出了一种可逆的自适应信息隐藏方案。该方案根据待隐藏信息的大小,在满足嵌入容量要求的条件下自适应地选择嵌入的差值位置,以最大程度保障嵌入信息后图像的视觉质量;同时,根据一般自然图像边沿灰度像素数较少的特点,采用位置映射法避免直方图平移过程中可能出现的灰度值溢出问题。实验结果表明,自适应方法较固定位置嵌入法能提供更大的嵌入空间和更高的图像信噪比。Using public network to transmit secret data is the core content of network intelligence war.In this paper,a reversible adaptive information hiding scheme is proposed based on difference histogram and histogram translation by using the strong correlation of gray values between adjacent pixels of general natural image.Under the premise of the embedding capacity being met,the scheme adaptively selects the embedded difference positions according to the size of the information to be hided,which would maximally guarantee the visual quality of the hided image;furthermore,in consideration of the fact that there are few pixels with edge gray value existed in one natural picture,a method based on position mapping is adopted to avoid the possible overflow of gray value in the process of histogram shifting.Experimental results shows that the proposed adaptive method can provide larger embedding space and higher image SNR than the fixed position embedding method.

关 键 词：差值直方图 自适应 可逆信息隐藏 信噪比 嵌入容量 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]