基于图像块高位平面无损压缩的可逆信息隐藏方法  

Reversible data hiding method based on image block high bit planes lossless compression

作　　者：顼聪[1] 陶永鹏[1] 朱毅[1] 郭鹏[1] XU Cong;TAO Yong-peng;ZHU Yi;GUO Peng(School of Software,Dalian University of Foreign Language,Dalian 116044,China)

机构地区：[1]大连外国语大学软件学院,辽宁大连116044

出　　处：《东北师大学报（自然科学版）》2023年第3期101-108,共8页Journal of Northeast Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(61806038);辽宁省教育厅基本科研项目(LJKMZ20221552);大连外国语大学校内科研基金资助项目(2021XTYB23).

摘　　要：提出了一种基于图像块高位平面无损压缩的密文域可逆信息隐藏算法.图像所有者对原始图像进行分块,通过块级别的加密算法进行加密,保留块内像素的相关性;信息隐藏者使用哈夫曼编码技术对图像块的高位冗余平面进行编码压缩,制造可用空间.接收者根据拥有的密钥实现数据提取、图像解密和图像无损恢复的分离操作.在不同纹理的图像测试中,本文算法的平均嵌入率达到了1.78 bit/像素,直接解密后标记图像的平均峰值信噪比(Peak Signal-to-Noise Ratio,PSNR)为47.50 dB.测试结果表明:与同类算法相比,本文算法能够显著提高信息的嵌入率.This paper proposes a reversible data hiding algorithm in ciphertext field based on image block high-bit-plane lossless compression.The image owner blocks the original image and encrypts it with a block-level encryption algorithm to preserve the correlation of pixels in the block;the data hider uses Huffman coding technology to encode and compress the high-level redundant plane of the image block to create free space.The receiver realizes the separate operations of data extraction,image decryption and image lossless recovery according to the key it has.In the image test of different textures,the average embedding rate of the algorithm in this paper reaches 1.78 bit/pixel,and the average Peak Signal-to-Noise Ratio(PSNR)of the marked image after direct decryption is 47.50 dB.The results show that compared with similar algorithms,the proposed algorithm can significantly improve the data embedding rate.

关 键 词：加密图像 可逆信息隐藏 图像恢复 嵌入率 哈夫曼编码 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]