| 一种基于混沌系统的数字水印方法 |
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| 引用本文： | 宋劲松,张晓阳,罗贞富,李振华. 一种基于混沌系统的数字水印方法[J]. 通信技术, 2009, 42(8): 79-81 |
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| 作者姓名： | 宋劲松 张晓阳 罗贞富 李振华 |
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| 作者单位： | 1. 四川大学,四川,成都,610041
2. 成都市无线电监测站,四川,成都,610031 |
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| 摘 要： | 文中提出了一种基于混沌系统的数字水印方法，该方法在水印嵌入时将原始图像的中频系数与混沌序列相加，并将取模后的结果用于混沌动力学的迭代。在水印嵌入过程中引入的取模非线性变换使得所产生的水印信号与原来的混沌信号大不相同，同时原始混沌水印序列的周期加长，可以克服有限字长效应的影响，从而进一步技术安全性。理论分析及仿真结果表明，该方法在水印提取过程中不需要原始图像，简单易行，具有较好的鲁棒性。
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| 关 键 词： | 数字水印 混沌系统 信息加密 |
A Digital Watermarking Method Based on Chaos System |
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| SONG Jing-song,ZHANG Xiao-yang,LUO Zhen-fu,LI Zhen-hua. A Digital Watermarking Method Based on Chaos System[J]. Communications Technology, 2009, 42(8): 79-81 |
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| Authors: | SONG Jing-song ZHANG Xiao-yang LUO Zhen-fu LI Zhen-hua |
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| Affiliation: | SONG Jing-song, ZHANG Xiao-yang, LUO Zhen-fu, LI Zhen-hua (1Sichuan Univ. , Chengdu Sichuan 610041, China; 2Chengdu Radio Monitoring Station, Chengdu Sichuan 610031, China) |
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| Abstract: | This article gives a digital watermarking method based on single chaos system, in which the middle frequency coefficient of original image is added to chaos sequence in watermark embedding and its result after impression is used for iteration of chaos dynamics. Impression of nonlinear transformation coming from the process of watermark embedding makes this watermarking signal totally different from the original chaos signal, at the mean time the cycle of original chaos sequence would be lengthened to overcome the effect resulting from the limited word length for safety increase. |
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| Keywords: | digital watermark chaotic system information encryption |
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