| 数字水印嵌入分析研究 |
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| 引用本文： | 张向华,韦鹏程.数字水印嵌入分析研究[J].计算机工程与设计,2008,29(10):2674-2677. |
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| 作者姓名： | 张向华 韦鹏程 |
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| 作者单位： | 重庆大学计算机科学与工程学院,重庆,400044;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： | 国家自然科学基金
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重庆市自然科学基金 |
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| 摘 要： | 在借鉴传统通信模型的基础上提出了图像数字水印系统的通信模型,从信息论的角度研究水印系统的性能,对水印算法设计中所涉及到的嵌入强度、嵌入位置和水印信道的容量等问题进行了理论分析,并推导出有效提取水印的信噪比下界.根据理论结果设计的水印算法具有良好的不可感知性和鲁棒性,最后实验结果表明了该分析和计算的有效性及可行性.
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| 关 键 词： | 数字水印 信道容量 嵌入强度 嵌入位置 |
| 文章编号： | 1000-7024(2008)10-2674-04 |
| 修稿时间： | 2007年11月30 |
Embedding strategy analysis and calculation of digital watermarking |
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| ZHANG Xiang-hua,WEI Peng-cheng.Embedding strategy analysis and calculation of digital watermarking[J].Computer Engineering and Design,2008,29(10):2674-2677. |
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| Authors: | ZHANG Xiang-hua WEI Peng-cheng |
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| Affiliation: | ZHANG Xiang-hua1,2,WEI Peng-cheng1,2(1.College of Computer Science , Engineering,Chongqing University,Chongqing 400044,China,2.Department of Computer , Modern Education Technology,Chongqing Education College,Chongqing 400067,China) |
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| Abstract: | The communication system model of digital image watermarking is proposed by using its traditional one.The performance of watermarking system is investigated based on information theory,and the intensity and position embedded and the capacity of water-marking channel is analyzed and calculated,the lower bound of signal-to-noise rate for effectual extraction of watermark is obtained.The simulations show that the theoretic analysis is correct and the watermarking algorithms derived from theoretic result have g... |
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| Keywords: | digital watermarking channel capacity intensity embedded position embedded |
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