| 基于三维DCT的彩色图象自适应水印算法 |
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| 引用本文： | 程卫东,黄继武,刘红梅.基于三维DCT的彩色图象自适应水印算法[J].电子学报,2001,29(Z1):1778-1781. |
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| 作者姓名： | 程卫东 黄继武 刘红梅 |
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| 作者单位： | 1. 中山大学电子与通信工程系, 广东广州, 510275;
2. 成都信息工程学院电子系, 四川成都, 610041 |
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| 基金项目： | 国家自然科学基金，广东省自然科学基金，广东省广州市科技攻关项目，教育部高校骨干教师资助计划，69975011,60172067,60133020，980442，2000-Z-004-01，，，，， |
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| 摘 要： | 本文提出了一种基于3D-DCT的彩色图象自适应水印算法.证实了RGB彩色图象的3D-DCT比2D-DCT具有更好的能量汇聚性质并因此具有更大的感觉容量,从而允许嵌入更强的水印信号.在此基础上,提出了利用人眼彩色视觉特性来自适应控制水印嵌入强度的方法.实验证明该算法较好地平衡了隐形水印的不可见性和稳健性之间的矛盾,所隐藏的水印对常规性攻击,如JPEG压缩、加性噪声、图象滤波、彩色变化和亮度/对比度变化等,具有很好的抵抗能力.
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| 关 键 词： | 彩色图象水印 3D-DCT 彩色视觉特性 自适应水印 稳健性 |
| 文章编号： | 0372-2112(2001)12A-1778-04 |
| 收稿时间： | 2001-05-14 |
| 修稿时间： | 2001年5月14日 |
A Color Image Watermarking Algorithm Based on 3D-DCT |
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| CHENG Wei-dong,HUANG Ji-wu,LIU Hong-mei.A Color Image Watermarking Algorithm Based on 3D-DCT[J].Acta Electronica Sinica,2001,29(Z1):1778-1781. |
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| Authors: | CHENG Wei-dong HUANG Ji-wu LIU Hong-mei |
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| Institution: | 1. Dept. of, Electronic and, Communication, Engineering, Zhong, Shan, University, Guangzhou, Guangdong 510275, China;
2. Dept.of, Electronics, Chengdu, University of, Information, Technology, Chengdu, Sichuan 610041, China |
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| Abstract: | In this paper,an adaptive color image-watermarking algorithm based on 3D-DCT(Three Dimensional-Discrete Cosine Transform) is proposed.The algorithm demonstrates that 3D-DCT outperforms 2D-DCT in terms of energy concentration.Since the 3D-DCT coefficients of a color image have larger magnitudes than that of the 2D-DCT coefficients,the 3D-DCT coefficients have larger perceptual capacity and then allow to embed stronger watermark signal.Based on 3D-DCT,we propose to change the watermark strength adaptively by taking account of the perceptual feature of human visual system.The experimental results show that the proposed algorithm can trade-off the conflict of transparency and robustness of invisible watermark well,the thus generated watermark can with-stand under the common attacks,such as JPEG compression,additive noise,image filtering,color and luminance/contrast alteration very well. |
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| Keywords: | 3D-DCT |
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