摘要
将Logistic映射产生的混沌序列作为载波 ,利用序列具有的良好相关特性 ,提出了一种图像保密通信方案。计算机仿真结果表明 ,只要收发双方使用相同的初值条件 ,即使在有一定噪声的情况下也能正确地进行图像传输 ,而初值的微小差异将导致通信失败 ,表明混沌序列用于保密通信具有很高的安全性能 ,同时方案具有很强的抗干扰能力。对图像恢复质量进行了评估 。
The chaotic sequences generated by logistic map are used as the carrier, and the image secure communication scheme is proposed based on that the sequences possess a good correlation property. Promising results are obtained on Lenna image by computer simulation. The obtained results indicate that the transmitted source image can be correctly recovered and the proposed scheme is reliable when transmitter and receiver using identical initial value even under the situations of a noisy channel. However, the tiny difference of initial value between transmitter and receiver will result in failure to communication. Finally, the quality of recovered source image is assessed, and the approximate formula of bit-error rate in term of code length is also obtained.
出处
《重庆大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第1期18-21,共4页
Journal of Chongqing University
基金
国家自然科学基金资助项目 (60 2 710 19)
国家教育部博士点基金资助项目 (2 0 0 2 0 6110 0 7)
重庆市科委应用基础研究基金资助项目 (73 70 )
