基于DCT系数值排序预测的加密域JPEG图像可逆信息隐藏方案  

Reversible Data Hiding Scheme for Encrypted JPEG Image Based on DCT Coefficient-Value-Ordering Predictor

作　　者：季晓勇[1] 柏森[1] 闫兵[1] 

机构地区：[1]中国人民解放军重庆通信学院,重庆400035

出　　处：《无线互联科技》2016年第8期102-105,共4页Wireless Internet Technology

基　　金：国家自然科学基金项目;项目编号:61272043;重庆市基础与前沿研究计划项目;项目编号:cstc2013jj B40009;重庆市科技研发基地能力提升项目;项目编号:cstc2014pt-sy40003

摘　　要：文章提出一种基于DCT系数值排序预测的加密域JPEG图像可逆信息隐藏方案,该方案能够抵抗针对JPEG图像加密的轮廓攻击方法。区别于现有加密域JPEG图像信息隐藏方法,文章利用混沌加密方法置乱JPEG图像标识符,掩盖了加密域JPEG图像中的分块信息,利用基于DCT系数值排序预测的方法将秘密信息可逆嵌入加密JPEG图像中。在进行信息嵌入和提取的过程中,基于DCT系数值排序预测的可逆信息隐藏方法无需利用JPEG图像的分块信息,且信息嵌入的效率高,提取准确。实验结果显示,文章方案的安全性和嵌入容量都得到很大程度的提升,含密图像的图像质量也有一定程度的提高。A DCT coefficient-value-ordering（DVO） predictor based reversible data hiding（RDH） scheme for encrypted JPEG images is proposed in this work and it is able to resist sketch attack. Unlike the existing RDH method for JPEG images in encrypted domain, the information of dividing encrypted JPEG image into 88 blocks is masked in the proposed scheme and then, a secret message is embedding into the JPEG image in encrypted domain by DVO predictor based method. The DVO predictor based RDH method is processed with DCT coefficients so that the block information of encrypted JPEG is not used in data hiding and data extracting. Simulation results show that the safety performance of the proposed scheme is improved and the embedding capacity of the proposed scheme is enlarged. The PSNR of the stego-image is also higher than the existing encrypted JPEG RDH method.

关 键 词：密文图像 信息隐藏 JPEG 可逆信息隐藏 

分 类 号：TP391.41[自动化与计算机技术—计算机应用技术] TP309.7[自动化与计算机技术—计算机科学与技术]