| 一种改进的K均值数字图像水印算法 |
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| 引用本文： | 贵琦,柏森,孙静.一种改进的K均值数字图像水印算法[J].计算机工程与应用,2006,42(34):166-168. |
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| 作者姓名： | 贵琦 柏森 孙静 |
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| 作者单位： | 1. 重庆通信学院,四川,重庆,400035
2. 重庆通信学院,四川,重庆,400035;重庆大学,计算机学院,四川,重庆,400044 |
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| 基金项目： | 重庆市应用基础研究基金 |
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| 摘 要： | 提出了一种将K均值聚类方法应用到频域的图像水印算法。算法采用彩色图像作为原始图像,首先提取出原始图像的RGB分量,然后对不同的分量进行分块DCT变换,提取其中的DC分量,根据DC分量的大小进行聚类分析,得到其中数值较大的点用来嵌入水印信息,水印在嵌入之前进行置乱,以增强其安全性。仿真实验表明,水印是不可察觉的,并能有效地抵抗一些图像处理攻击,尤其对JPEG压缩具有良好的鲁棒性。
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| 关 键 词： | 数字水印 K均值聚类 DCT变换 DC分量 |
| 文章编号： | 1002-8331（2006）34-0166-03 |
| 收稿时间： | 2006-02 |
| 修稿时间： | 2006-02 |
Improved Digital Image Watermarking Based on K-Means Algorithm |
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| GUI Qi,BAI Sen,SUN Jing.Improved Digital Image Watermarking Based on K-Means Algorithm[J].Computer Engineering and Applications,2006,42(34):166-168. |
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| Authors: | GUI Qi BAI Sen SUN Jing |
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| Affiliation: | 1.Chongqing Communication Institute,Chongqing,Siehuan 400035,China; 2.College of Computer Science, Chongqing University, Chongqing,Sichuan 400044,China |
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| Abstract: | In this paper,a digital image watermarking algorithm based on K-means in frequency domain is proposed. This method extracts the RGB components from the color image and divides the RGB components into blocks and transforms it by DCT,then dusters these DC coefficients which has been extracted from transformed coefficients then embeds the scrambled watermark into the bigger ones.Experimental results show that the watermark is imperceptible and the proposed method is robust against image attacks especially to JEPG compression. |
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| Keywords: | digital watermarking K-means cluster Discrete Cosine Transform(DCT) DC coefficients |
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