| 基于混沌加密的DCT域灰度级盲水印算法 |
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| 引用本文： | 鲍政,张建伟,夏德深.基于混沌加密的DCT域灰度级盲水印算法[J].计算机工程,2006,32(7):157-159,162. |
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| 作者姓名： | 鲍政 张建伟 夏德深 |
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| 作者单位： | 1. 南京信息工程大学数学系,南京210044
2. 南京理工大学计算机系,南京210094 |
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| 基金项目： | 香港研究资助局资助项目 |
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| 摘 要： | 结合混沌序列的优良特性给出了一个简单有效的图像混沌置乱算法，提出了一个在未压缩灰度级水印数据量的情况下。基于调整载体图像DCT块系数与其对应8邻域块DCT系数均值的关系，自适应嵌入水印信息的盲水印算法。实验结果表明，该算法对JPEG压缩、裁剪等常见的图像处理操作有较好的鲁棒性。具有一定的实用性。
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| 关 键 词： | 离散余弦变换 混沌加密 灰度水印 盲提取 |
| 文章编号： | 1000-3428（2006）07-0157-03 |
| 收稿时间： | 2005-04-06 |
| 修稿时间： | 2005-04-06 |
A Gray-scale Blind Watermarking Algorithm in DCT Domain Based on Chaotic Encryption |
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| BAO Zheng,ZHANG Jianwei,XIA Deshen.A Gray-scale Blind Watermarking Algorithm in DCT Domain Based on Chaotic Encryption[J].Computer Engineering,2006,32(7):157-159,162. |
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| Authors: | BAO Zheng ZHANG Jianwei XIA Deshen |
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| Affiliation: | 1. Department of Mathematics, Nanjing University of Information Science and Technology, Nanjing 210044; 2. Department of Computer. Nanjing University of Science and Technology, Nanjing 210094 |
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| Abstract: | More and more researchers focus on meaningful digital watermarking, especially gray-scale watermarking, because it has much good advantage but is hard to deal with. First, this paper gives a simple but effective chaotic transform encryption algorithm of image, and then presents a gray-scale blind watermarking technique operating on DCT domain, which automatically embeds watermarking information by adjusting the relationship of coefficients of selected DCT block with the mean of corresponding coefficients of DCT blocks around the selected DCT block. The experimental results show that the proposed algorithm is effective and robust to common image processing operations and some geometric distortions such as JPEG compression and cropping. So a conclusion can be made that the proposed technique is practical. |
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| Keywords: | Discrete cosine transformation Chaotic encryption Gray-scale watermarking Blind extracting |
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