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计算机工程 ›› 2007, Vol. 33 ›› Issue (07): 18-20. doi: 10.3969/j.issn.1000-3428.2007.07.006

• 博士论文 • 上一篇    下一篇

基于分集与谱线增强器的彩图可读水印盲算法

唐世福,马 洪,苏理云   

  1. (四川大学数学学院,成都 610064)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2007-04-05 发布日期:2007-04-05

Blind Scheme of Color Image for Readable Watermark Based on Diversity and ALE

TANG Shifu, MA Hong, SU Liyun   

  1. (Mathematical College, Sichuan University, Chengdu 610064)
  • Received:1900-01-01 Revised:1900-01-01 Online:2007-04-05 Published:2007-04-05

摘要: 利用分集接收能够大幅度改善系统接收性能的原理,把彩色图像看成是多通道的通信信道,可读水印被正弦调制,并分别被混沌置乱,嵌入到彩色图像3个通道的小波域中。检测时,利用自适应谱线增强器对宽带信号和窄带信号的良好分离特性,采用LMS算法将调制水印自适应地从各信道中提取出来,并被数字累加,设计了数字水印相关接收机,达到了最优盲检测。实验结果证实了理论推导。

关键词: 可读水印, 彩色图像, 分集接收

Abstract: Based on the theory in which diversity can improve receiving performance, color image is regarded as multi-channel of communication. Readable watermark, modulated by sine wave, is chaos-scrambled and is embedded into wavelet domain of 3 channels of color image respectively. In detection, based on the good separation of ALE to broadband signal and narrowband signal, using LMS algorithm, the modulated watermarks will be extracted from channels adaptively and are accumulated. A correlation receiver of watermark is devised for the optimum blind detection. The experimental results validate the theoretic deduction.

Key words: Readable watermark, Color image, Diversity receiving