基于JPEG-LS的高效掌纹图像安全编码算法  

Secure Palmprint Image Coding Algorithm for JPEG-LS

作　　者：李恒建[1] 王连海[1] 张家树[2] 

机构地区：[1]山东省计算中心山东省计算机网络重点实验室,济南250014 [2]西南交通大学信号与信息处理四川省重点实验室,成都610031

出　　处：《计算机科学》2013年第9期141-146,181,共7页Computer Science

基　　金：国家自然科学基金项目(61070163);山东省优秀中青年科学家科研奖励基金(BS2011DX034);山东省自然科学基金(ZR2011FQ030)资助

摘　　要：提出一种基于JPEG-LS的对掌纹图像压缩的加密算法,它将JPEG-LS编码系统进行改进,增加了基于前馈反馈非线性动力学滤波器(FFNDF)的安全系统,即针对图像压缩编码最后的熵编码阶段,引入混沌系统,去除图像的空间冗余和相关冗余,以尽可能地降低图像加密对压缩的影响。对算法进行了安全性分析。与其它混沌压缩编码加密算法进行比较的实验结果表明,提出的压缩加密算法不仅具有较高的加密效率和安全性,且计算复杂度低,对压缩性能没有影响。Based on forward-feedback nonlinear dynamic fiher（FFNDF）, a secure JPEG-LS coder was proposed, and then the proposed algorithm was employed in palmprint image. According to the characteristics of JPEG-LS, FFNDF was employed to generate chaotic stream cipher and then encrypt the coded stream during in the regular mode and run mode. The security of proposed scheme was also analyzed and some other compression and encryption algorithms were also compared. The experimental results show that the proposed palmprint image encryption algorithm has the incom-prehensible nature of the encryption with high efficiency and security, as well as low-complexity and no affect on image compression performance.

关 键 词：无损压缩 图像加密 混沌加密 JPEG-LS 

分 类 号：TN918.1[电子电信—通信与信息系统]