基于位平面分块编码的可逆信息隐藏方法  

Reversible Information Hiding Method Based on Bit-plane Block Coding

作　　者：顼聪[1,2] 刘朝霞[2] 陶永鹏[1,2] 景雨[2] XU Cong;LIU Zhaoxia;TAO Yongpeng;JING Yu(School of Software,Dalian University of Foreign Languages,Dalian 116044,China;Research Center for Language Intelligence,DaLian University of Foreign Languages,DaLian 116044,China)

机构地区：[1]大连外国语大学软件学院,辽宁大连116044 [2]大连外国语大学语言智能研究中心,辽宁大连116044

出　　处：《火力与指挥控制》2022年第12期6-13,共8页Fire Control & Command Control

基　　金：国家自然科学基金(61501082);2022年度辽宁省教育厅基本科研项目(LJKMZ20221552);2021年度大连外国语大学科研基金资助项目(2021XJYB23)。

摘　　要：针对当前加密图像可逆信息隐藏方法中存在的嵌入率低,标记图像直接解密后视觉质量差的问题,提出一种位平面分块编码的加密图像可逆信息隐藏方法。算法通过2D sine logistic混沌映射对图像分块加密,保留块内像素的相关性。将加密后的图像块化分成8个位平面,在低阶位平面中,根据块平面内0元素和1元素的分布情况,进行编码压缩,利用压缩后块平面内生成冗余空间进行机密信息的嵌入,图像的其余位平面部分则保持不变。在接收端,接收者获取密钥后可以进行信息提取,图像解密和图像的无损恢复。利用标准图像库中图像进行仿真实验,结果表明:随着可嵌入低位平面数的增加,算法的嵌入容量逐渐增大,在低阶平面数取3时,该算法保持较高的嵌入率时,仍然使得直接解密后的图像仍具有较高的PSNR值。Aiming at the problem of low embedding rate in current reversible information hiding methods for encrypted images,and poor visual quality of marked images after direct decryption.a bitplane block-coding encrypted image reversible information hiding method is proposed.The algorithm uses 2D sine logistic chaotic mapping to encrypt the image blocks and to preserve the correlation of the pixels in the image block.The encrypted image block is divided into 8 bit planes.In the low-level bit plane of the image block,coding and compression are performed according to the distribution condition of 0 elements and 1 elements in the plane,and the redundant space is generated in the compressed bloack plane to embed confidential information.The rest of the bit plane part of the image block remains unchanged.At the receiving end,the recipient can perform information extraction,image decryption and lossless recovery of the image after obtaining the key.The simulation experiments are performed using images in the standard image library.The results show that as the number of embeddable low-level planes increases,the embedding capacity of the algorithm gradually increases.When the number of low-level planes is 3,the algorithm can remain higher information embedding rate while ensuring the directly decrypted image has a higher PSNR value.

关 键 词：可逆信息隐藏 加密图像 块编码 嵌入率 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]