| 基于小波变换的数字图像水印 |
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| 引用本文： | 冯少辉,郭宗明.基于小波变换的数字图像水印[J].计算机工程与应用,2008,44(20):75-76. |
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| 作者姓名： | 冯少辉 郭宗明 |
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| 作者单位： | 北京大学,计算机科学技术研究所,北京,100871 |
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| 基金项目： | 国家高技术研究发展计划(863计划)
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国家资助项目 |
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| 摘 要： | 不可见性和鲁棒性是数字水印的两个基本特征。提出了一种在小波变换中频部分嵌入水印的方法。该方法从小波变换的中频部分选择待嵌入系数,并根据人类视觉系统的频率掩蔽特性对嵌入强度进行自适应调整。实验结果表明,该方法能够使水印的鲁棒性和不可见性达到较好折中,适用于灰度图像和彩色图像。
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| 关 键 词： | 离散小波变换 数字水印 不可见性 鲁棒性 |
| 收稿时间： | 2007-10-10 |
| 修稿时间： | 2007-12-24
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Digital image watermarking method based on wavelet transform |
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| FENG Shao-hui,GUO Zong-ming.Digital image watermarking method based on wavelet transform[J].Computer Engineering and Applications,2008,44(20):75-76. |
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| Authors: | FENG Shao-hui GUO Zong-ming |
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| Affiliation: | Institute of Computer Science &; Technology，Peking University，Beijing 100871，China |
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| Abstract: | Unobtrusiveness and robustness are two elementary characteristics of watermarking technology.In this paper,we propose a wavelet-based watermarking method which embeds watermark in middle frequency parts.By this method,wavelet coefficients are chosen from the middle frequency bands,and a well trade-off between unobtrusiveness and robustness has been achieved by adjusting the embedding intension factor according to the characteristics of HVS.The results of experiments show that the method is effective to both gray digital images and color digital images. |
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| Keywords: | discrete wavelet transform digital watermark unobtrusiveness robustness |
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