一种基于MQ编码器的图像联合压缩加密算法  

Image Joint Compression-encryption Algorithm Based on MQ Encoder

作　　者：谢凯明[1] 邓家先[1] 

机构地区：[1]海南大学信息科学技术学院,海南海口570228

出　　处：《电视技术》2014年第9期62-66,120,共6页Video Engineering

基　　金：海南省自然科学基金项目(613155)

摘　　要：为实现图像的压缩和加密同步,使用MQ编码器对内嵌零树小波压缩算法进行改进,将混合混沌序列作为流密钥对比特平面编码生成的上下文和判决进行修正,并送入MQ编码器进行熵编码。对算法进行仿真,结果表明:与原压缩算法相比,所提出算法的重构图像PSNR值至少提高了1 dB,且抗攻击性好,加解密速度快。算法实现了分辨率选择性加密,并在数据压缩的同时实现了算术加密。To synchronize image compression and encryption, MQ arithmetic encoder is used to improve the Embedded Zerotree Wavelet （EZW）com- pression algorithm. The mixed chaotic sequence is regarded as flow key to modify the context and decision which are generated in the process of bit plane coding, then the modified context and decision are sent into MQ encoder for entropy coding. Simulation results indicate that the proposed algorithm en- hances over 1 dB of reconstructed image＇ s PSNR value compares to the original EZW algorithm. It can well resist attack and has high speed of encryp- tion/decryption. The proposed algorithm realizes resolution selective encryption. In addition, it realizes arithmetic encryption at the same time of data compression

关 键 词：压缩加密 算术加密 分辨率选择性加密 混沌加密 

分 类 号：TN919.81[电子电信—通信与信息系统]