降低文件增长和失真的零系数JPEG图像可逆信息隐藏  

Zero-coefficient Based Reversible Data Hiding in JPEG Images with Reduced File-growth and Distortion

作　　者：苏童 和红杰[1] 原长琦 陈帆[3] SU Tong;HE Hongjie;YUAN Changqi;CHEN Fan(School of Information Science and Technology,Southwest Jiaotong University,Chengdu 611756,China;Beijing Institute of Electronics Technology and Application,Beijing 100091,China;School of Computing and Artificial Intelligence,Southwest Jiaotong University,Chengdu 611756,China)

机构地区：[1]西南交通大学信息科学与技术学院,四川成都611756 [2]北京电子技术应用研究所,北京100091 [3]西南交通大学计算机与人工智能学院,四川成都611756

出　　处：《铁道学报》2023年第1期51-62,共12页Journal of the China Railway Society

基　　金：国家自然科学基金(U1936113,61872303)。

摘　　要：零系数嵌入能有效提高基于直方图平移的JPEG图像可逆信息隐藏(RDH)的嵌入容量,但会产生较大的文件增长和视觉失真。在研究零系数嵌入频率选择和块选择策略的基础上,提出一种能有效降低文件增长和失真的零系数JPEG图像RDH算法。首先分析零系数嵌入对中间符号零游程长度的影响,得到在不同频率下零系数嵌入的模拟文件增量,并定义用于零系数嵌入频率选择的模拟单位文件增量;然后把用于块选择的块平滑度函数定义为两个恒定特征的加权和,分析讨论零系数嵌入的两个恒定特征选取、处理及其权重选取策略;最后设计一种能降低文件增长和失真的零系数JPEG图像RDH算法。实验结果表明:与非零嵌入算法相比,零系数的嵌入容量可增加8~17倍,算法的视觉质量平均可增加1.2~2.5 dB,尤其对于较小的质量因子;与现有零系数嵌入算法相比,算法的视觉质量平均增加1.8~2.3 dB,单位文件增量平均减少0.22~0.36。Zero-coefficient embedding(ZCE)can effectively increase the embedding capacity of reversible data hiding in JPEG images based on histogram shifting,but will cause large file growth and visual distortion.Based on the study of frequency selection and block selection strategies for ZCE,this paper proposed a zero-coefficient based reversible data hiding algorithm for JPEG images that can effectively reduce file-growth and distortion.First,based on the analysis of the influence of ZCE on zero-run-length of intermediate symbols,the simulation file increment of ZCE at different frequencies was obtained,and a simulation unit file increment used to select ZCE frequency was defined.Then,the block smoothness function used for block selection was defined as the weighted sum of two constant features.The selection,processing and weight selection strategies of the two constant features of ZCE were analyzed and discussed.Finally,a zero-coefficient based reversible data hiding algorithm for JPEG images that can reduce file-growth and distortion was designed.The experimental results show that,compared with non-ZCE algorithms,the embedding capacity of the ZCE algorithm can be increased by 8 to 17 times.The visual quality of the algorithm proposed in this paper is improved by an average of 1.2~2.5 dB,especially for small quality factors.Compared with existing ZCE algorithm,the visual quality of the algorithm proposed in this paper is improved by an average of 1.8~2.3 dB,and the unit increase of file size is reduced by 0.22~0.36 on average.

关 键 词：可逆信息隐藏 JPEG图像 频率选择 块选择 文件增长 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]