| 基于差调制的扩频水印算法(英文) |
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| 作者姓名： | 刘飞龙 王阳生 |
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| 作者单位： | 中国科学院自动化研究所模式识别实验室, 北京 100080 |
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| 摘 要： | 扩展频水印技术是一种鲁棒的水印算法.如何提高扩频水印算法的鲁棒性是当前一大研究热点.充分利用图象的像素与其周围像素之间的差值的统计特性,利用差调制的方法嵌入水印信息,从而降低了原始图象对该水印算法鲁棒性的影响,来提高水印算法的鲁棒性.理论分析表明,该算法可以同时获得较小的误警和误拒概率,从而表明该算法有较好的性能.实验结果表明,该算法可以鲁棒地抵抗常用的攻击,如JPEG压缩、中值滤波、加噪声和图象大小调整.
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| 关 键 词： | 扩频水印 差调制 水印嵌入 水印检测 假设检验 |
| 收稿时间： | 2003-01-24 |
| 修稿时间： | 2003-04-11 |
Improved Spread Spectrum Image WatermarkingVia Difference Modulation |
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| Authors: | LIU Fei-Long WANG Yang-Sheng |
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| Institution: | National Laboratory of Pattern Recognition Institute of Automation, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | Currently,spread spectrum watermarking is a kind of robust watermarking technology.How toimprove the robustness of spread spectrum watermarking becomes the focus of current research on robustwatermarking.In this paper,we use the differences between the pixel value and its predictive value,which is calculated by its surrounding pixels,to embed watermark so that we can reduce the effect by theoriginal image on the robustness,and then strengthen the robustness of spread spectrum watermarking.Theoretical analysis shows that our algorithm can achieve small false alarm and false rejection probabilitiessimultaneously,which implies that it has good robustness.Experimental results demonstrate that the algorithmis robust to common typical attacks such as JPEG compression,median filtering,noise addition andimage resizing |
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| Keywords: | spread spectrum watermarking difference modulation watermarking embedding watermarkingdetection hypothesis test |
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