| 基于CDMA的彩色图像数字水印算法的研究 |
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| 引用本文： | 季春风,杨峰.基于CDMA的彩色图像数字水印算法的研究[J].信息技术与信息化,2009(1). |
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| 作者姓名： | 季春风 杨峰 |
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| 作者单位： | 山东师范大学信息科学与工程学院,济南,250014 |
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| 摘 要： | CDMA是通信系统中一种有效的通信方式.水印信道与通信信道之间具有相似性,可以将CDMA引入数字水印技术中,利用CDMA技术在数字媒体中嵌入信息是一种实用、有效的方法.文章提出了基于CDMA原理的扩频数字水印的实现,采用Walsh码作为正交扩频序列.然后将水印信息嵌入到载体图像的DCT(离散小波变换)的中频系数中.实验表明该方法具有良好的不可见性和鲁棒性.
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| 关 键 词： | 离散余弦变换 Walsh码 |
Reseach on Color Image Watermarking Algorithm based on CDMA |
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| JI Chun-feng,YANG Feng.Reseach on Color Image Watermarking Algorithm based on CDMA[J].Information Technology & Informatization,2009(1). |
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| Authors: | JI Chun-feng YANG Feng |
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| Abstract: | CDMA(Code Division Multiple Access)is an effective mean in communication system.Because of the similarity between the digital watermarking channel and the communication system,it is possible to introduce CDMA to the digital watermarking technology.Using CDMA to embed information into the digital media is a practical and effective way.This thesis proposed an implemention of spread spectrum digital watermarking based on CDMA using Walsh Code as the orthogonal sequence.At last the watermarking information was ... |
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| Keywords: | CDMA |
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