基于预测误差压缩编码的可逆信息隐藏算法  

Reversible Data Hiding Algorithm Based on Prediction Error Compression Coding

作　　者：郭继峰[1] 刘玉彤 张健[2] 刘志刚[3] GUO Ji-feng;LIU Yu-tong;ZHANG Jian;LIU Zhi-gang(School of Information and Computer Engineering,Northeast Forestry University,Harbin 150040,China;Artificial Intelligence Academy,Wuxi Vocational College of Science and Technology,Wuxi 214028,China;Control Technology Institute,Wuxi Institute of Technology,Wuxi 214121,China)

机构地区：[1]东北林业大学信息与计算机工程学院,哈尔滨150040 [2]无锡科技职业学院人工智能学院,江苏无锡214028 [3]无锡职业技术学院控制技术学院,江苏无锡214121

出　　处：《小型微型计算机系统》2020年第11期2347-2353,共7页Journal of Chinese Computer Systems

基　　金：国家自然科学基金项目(61300098)资助;黑龙江省自然科学基金项目(LH2019C003)资助;江苏高校′青蓝工程′资助.

摘　　要：提出一种基于预测误差压缩编码的可逆信息隐藏算法.本算法利用全局混沌异或加密方法,在加密灰度图像的基础上,对图像n次均匀分块,每块采用无损预测编码原则,筛选出压缩的加密图像块,每位像素值八进制的低三位作为隐藏空间用于嵌入信息.对于嵌入秘密信息后的加密图像可直接利用隐藏密钥提取出秘密信息,拥有隐藏密钥和加密密钥时可提取出秘密信息,并且完全无误得恢复出载体图像.实验表明,在n次的均分块经无损编码不仅提高了加密图像的嵌入容量,并且可逆无损恢复出原始载体图像.在UCID图像库中测试随机选取的100幅图像,平均嵌入率为1.094bpp,可见本文算法普遍适用于一般图像.A reversible data hiding algorithm based on prediction error compression coding is proposed.This algorithm uses the global chaotic XOR encryption method.Based on the encrypted gray image,the image is evenly divided into n blocks.Each block uses the principle of lossless predictive coding to filter out compressed encrypted image blocks.Each pixel value is octal low.Three bits are used as hidden space for embedding data.For the encrypted image embedded with the secret data,the secret data can be directly extracted by using the hidden key,and the secret data can be extracted when the hidden key and the encryption key are possessed,and the carrier image can be restored without error.Experiments show that the lossless coding of n-time equal blocks not only improves the embedding capacity of the encrypted image,but also reversibly and losslessly restores the original carrier image.100 randomly selected images were tested in the UCID image library,and the average embedding rate was 1.094bpp.It can be seen that the algorithm in this paper is generally applicable to general images.

关 键 词：可逆信息隐藏 混沌异或图像加密 无损预测误差 编码压缩 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]