| 基于信息论的数字水印研究 |
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| 引用本文： | 张向华,韦鹏程.基于信息论的数字水印研究[J].计算机科学,2009,36(3):248-249. |
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| 作者姓名： | 张向华 韦鹏程 |
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| 作者单位： | 重庆教育学院计算机与现代教育技术系,重庆,400067 |
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| 基金项目： | 重庆市科委自然科学基金，重庆市教委资助项目 |
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| 摘 要： | 提出一种运用通信系统理论研究数字水印系统的方法.通过分析水印信道的特性来研究水印系统的性能,通过计算有关信号的交互信息、条件熵等数据对水印系统的嵌入强度、嵌入位置等问题进行了分析,推导出有效提取水印的信息论下限的方法,所得结果对于设计水印算法具有较强的指导作用.
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| 关 键 词： | 信息论 数字水印 信道容量 交互信息 |
| 收稿时间： | 7/1/2008 12:00:00 AM |
Study of Digital Watermarking Based on Information Theory |
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| ZHANG Xiang-hu,WEI Peng-cheng.Study of Digital Watermarking Based on Information Theory[J].Computer Science,2009,36(3):248-249. |
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| Authors: | ZHANG Xiang-hu WEI Peng-cheng |
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| Affiliation: | Dept.of Computer and Modern Education Technology;Chongqing Education College;Chongqing 400067;China |
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| Abstract: | A method of studying watermarking system using the theory of communication was presented.An information theoretic analysis of the intensity and position embedding and the capacity of watermarking channel,as well as an information theoretic bottom bounds for extraction effectually of watermark was proposed through calculating the mutual information and conditional entropy of the correlated signals.The results have a good role in guiding the designing of watermarking system. |
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| Keywords: | Information theory Digital watermarking Channel capacity Mutual information |
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