可自纠错的联合式加密图像可逆数据隐藏算法  

Joint reversible data hiding in encrypted images with the self-correcting ability

作　　者：邱应强[1] 蔡灿辉[1] 曾焕强[1] 冯桂[1] 林晓丹[1] 钱振兴 QIU Yingqiang;CAI Canhui;ZENG Huanqiang;FENG Gui;LIN Xiaodan;QIAN Zhenxing(College of Information Science and Engineering,Huaqiao Unirversity,Xiamen 361021,China;School of Computer Science,Fudan Unirversity,Shanghai 200433,China)

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361021 [2]复旦大学计算机科学技术学院,上海200433

出　　处：《西安电子科技大学学报》2021年第1期107-116,共10页Journal of Xidian University

基　　金：国家自然科学基金(61871434,61972168);华侨大学科研基金(17BS509)。

摘　　要：为了解决现有联合式加密图像可逆数据隐藏方法中存在的数据提取误码问题,并提高此类方法的数据嵌入容量,提出了一种兼具自纠错和内容隐私保护功能的新算法。该算法在图像加密前通过预处理生成纠错数据并以可逆方式自嵌入到图像下采样像素中,图像加密后只需保留或翻转其中各非采样像素分组的若干位最低有效位即可嵌入数据,图像解密后可100%正确提取嵌入数据并无失真恢复原图像。实验结果表明,该算法在解决联合式方法数据提取误码问题的基础上,大大提高了数据嵌入容量,同时直接解密得到的载密图像质量良好。该技术在军事、医学、云服务等众多领域有着广泛的应用价值。In order to solve the problem of extracted-bit errors in existing joint reversible data hiding methods for encrypted images and achieve a higher embedding capacity,a novel algorithm with self-correction and privacy protection is proposed.Before image encryption,the algorithm embeds self-correcting data generated by preprocessing into the down-sampling pixels of the image reversibly,and then data can be embedded into the encrypted image by reserving or flipping certain least significant bits of non-sampled pixels in each group.Experimental results show that the proposed algorithm greatly increases the embedding capacity,and that the quality of the decrypted marked image is fine.This technology can be used in military,medical,cloud services and other fields.

关 键 词：可逆数据隐藏 整数变换 加密 插值 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]