| 基于小波变换和人类视觉系统的稳健水印算法 |
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| 引用本文： | 王振飞,施保昌,王能超.基于小波变换和人类视觉系统的稳健水印算法[J].华中科技大学学报(自然科学版),2007,35(1):26-28. |
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| 作者姓名： | 王振飞 施保昌 王能超 |
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| 作者单位： | 1. 华中科技大学,计算机科学与技术学院,湖北,武汉,430074
2. 华中科技大学,数学系,湖北,武汉,430074 |
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| 摘 要： | 提出了一种基于小波和人类视觉系统的稳健数字水印算法,首先将宿主图像进行小波分解,根据人类视觉系统求出重要小波系数,然后将灰度水印图像通过Arnold变换进行置乱,最后将置乱后的水印信息加入到宿主图像的重要小波系数中.提取水印信号需使用置乱密钥.置乱密钥的使用提高了置乱算法的安全性,使水印的安全依赖于密钥.在小波域中利用人类视觉系统使嵌入水印的图像具有较好的鲁棒性.数值实验和理论分析表明,该算法针对各种攻击具有很好的鲁棒性和更高的安全性.
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| 关 键 词： | 小波变换 人类视觉系统 图像置乱 小波变换 人类 视觉系统 水印算法 wavelet transform algorithm watermarking 分析表 理论 数值实验 鲁棒性 水印图像 嵌入水印 利用 小波域 安全性 置乱算法 密钥 使用 水印信号 |
| 文章编号： | 1671-4512(2007)01-0026-03 |
| 修稿时间： | 11 16 2005 12:00AM |
Robust watermarking algorithm using wavelet transform and HVS |
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| Wang Zhenfei,Shi Baochang,Wang Nengchao.Robust watermarking algorithm using wavelet transform and HVS[J].JOURNAL OF HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY.NATURE SCIENCE,2007,35(1):26-28. |
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| Authors: | Wang Zhenfei Shi Baochang Wang Nengchao |
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| Institution: | a College of Computer Science and Technology; b Department of Mathematics, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | A novel wavelet-based watermarking scheme for copyright protection of digital image is presented.Host image was decomposed through wavelet transform.The significant coefficients of wavelet were selected according to the human visual system(HVS) characteristics.With this method,watermark was scrambled through Arnold transform before it was embedded.The usefulness of keys and privacy of modification to frequency coefficients enhance the security of watermark information.Experimental results show that the quality of the watermarked image is good and there is strong resistance against general image processing.Furthermore,the extracted watermark can still be easily identified after being attacked by different ways. |
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| Keywords: | wavelet transform human visual system(HVS) image scrambling |
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