基于位平面分割的密文域可逆信息隐藏算法  

Cryptographic domain reversible data hiding algorithm based on bit plane segmentation

作　　者：李天雪 张敏情[1] 狄富强 柯彦[1] Li Tianxue;Zhang Minqing;Di Fuqiang;Ke Yan(Key Laboratory of Network&Information Security Under the Armed Police Force Department of Electronic Technology,Engineering University of the CAPF,Xi’an 710086,China)

机构地区：[1]武警工程大学电子技术系网络与信息安全武警部队重点实验室,西安710086

出　　处：《计算机应用研究》2018年第9期2766-2771,共6页Application Research of Computers

基　　金：国家自然科学基金资助项目(61379152;61403417)

摘　　要：针对传统密文域可逆信息隐藏算法嵌入率低的问题,为提高嵌入容量,提出一种基于位平面分割的可逆信息隐藏算法。首先对高位平面进行定长游程编码压缩,压缩结果进行流加密并作为其头部信息,利用压缩冗余嵌入数据;然后对中位平面进行logistic混沌加密;最后将低位平面进行位翻转,利用AGM(adaptive group modification)方法嵌入数据。实验表明,该方法实现简单,嵌入率不超过0.5 bpp时,解密后携密图像的PSNR≈47.8 dB,实现了解密与提取的可分离,提取后再解密图像可100%恢复。Aiming at the problem of low embedded rate of traditional ciphertext domain reversible information hiding algorithm,this paper proposed a reversible information hiding algorithm based on bit-plane segmentation to improve the embedding capacity.Firstly,it compressed the high-bit-plane to fixed-length run-length coding,and streamed and used the compression result as header information.It used compressed redundancy to embed data.Then,logistic chaos encrypted the median-bit-plane.Finally,it flipped the low-bit-plane,used the AGM(adaptive group modification)method to embed data.The experimental results show that the method is simple and with the embedding rate does not exceed 0.5 bpp,the PSNR of the decrypted image is 47.8 dB,decryption and extraction are separable,first extract and then decrypt the image can be 100%recovery.

关 键 词：可逆信息隐藏 密文域 AGM 可分离操作 

分 类 号：TP309.2[自动化与计算机技术—计算机系统结构]