| 基于分块模运算数字图像水印算法性能分析 |
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| 引用本文： | 桑军,廖晓峰,祝伟华.基于分块模运算数字图像水印算法性能分析[J].计算机工程与应用,2005,41(1):11-13,131. |
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| 作者姓名： | 桑军 廖晓峰 祝伟华 |
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| 作者单位： | 重庆大学软件学院,重庆,400044;重庆大学计算机学院,重庆,400044;重庆大学计算机学院,重庆,400044;重庆大学软件学院,重庆,400044 |
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| 基金项目： | 国家自然科学基金(编号:60271019,70371030)，教育部博士点基金(编号:20020611007)，图像信息处理与智能控制教育部重点实验室开放基金(编号:TKLJ0301) |
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| 摘 要： | 基于分块模运算的数字图像水印算法通过在图像特征边缘点附近选择n×n像素点所组成的子块,并调整该块的平均亮度对于一个正整数2p取模的值来嵌入水印。分块大小n以及模数2p对于水印的不可感知性及稳健性具有重要影响。文章基于理论分析和实验验证研究了采用不同参数嵌入水印对于算法性能的影响,并对算法的安全性进行了简要讨论。其结论将有助于该类算法的实际应用。
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| 关 键 词： | 图像 数字水印 性能分析 |
| 文章编号： | 1002-8331-(2005)01-0011-03 |
Performance Analysis of Block-oriented and Modular-arithmetic-based Digital Image Watermarking |
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| Sang Jun,Liao Xiaofeng,Zhu Weihua.Performance Analysis of Block-oriented and Modular-arithmetic-based Digital Image Watermarking[J].Computer Engineering and Applications,2005,41(1):11-13,131. |
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| Authors: | Sang Jun Liao Xiaofeng Zhu Weihua |
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| Affiliation: | Sang Jun1,2 Liao Xiaofeng2 Zhu Weihua1 1 |
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| Abstract: | The block-oriented and modular-arithmetic-based digital image watermarking embeds watermark by selecting n×n neighboring pixels around the edges of the features and adjusting the mean intensities values of the selected blocks modulo 2p.The block size n and the modulus 2p strongly influence the imperceptibility and robustness of the embedded watermark.The performance of the watermarking scheme is studied with theoretic analysis and experimental verification using different parameters for watermarking embedding.The security of the algorithm is also briefly discussed.The results will benefit the applications of such type of watermarking scheme. |
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| Keywords: | image digital watermarking performance analysis |
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