| 基于边信息抗仿射变换的数字图像水印算法 |
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| 引用本文： | 袁大洋,王颖.基于边信息抗仿射变换的数字图像水印算法[J].中国科学院研究生院学报,2007,24(1):86-92. |
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| 作者姓名： | 袁大洋 王颖 |
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| 作者单位： | 信息安全国家重点实验室(中国科学院研究生院),北京,100049 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 设计抗几何攻击的图像水印算法是数字水印技术研究中的难点。仿射变换是典型的几何攻击，能够使目前大多数数字水印算法失效。基于带边信息的水印模型，本文提出了一种利用Zernike矩的抗仿射变换多比特图像水印算法。该算法将归一化图像的Zernike矩作为边信息，利用量化技术对的水印信息进行编码和嵌入。实验证明，本文提出的算法不仅具有很好的抗仿射变换和抗JPEG压缩的鲁棒性，而且具有较小的嵌入失真和较大的水印容量。
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| 关 键 词： | 数字水印 边信息 图像归一化 仿射变换 Zernike矩 |
| 文章编号： | 1002-1175(2007)01-0086-07 |
| 修稿时间： | 2006年3月15日 |
Side-information-based Image Watermarking Resistant to Affine Transformations |
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| YUAN Da-Yang,WANG Ying.Side-information-based Image Watermarking Resistant to Affine Transformations[J].Journal of the Graduate School of the Chinese Academy of Sciences,2007,24(1):86-92. |
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| Authors: | YUAN Da-Yang WANG Ying |
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| Institution: | Graduate University Of Chinese Academy of Sciences;
The State Key Laboratory Of Information Security
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| Abstract: | Image watermarking resistant to geometric attacks is challenging at present. As a typical geometric attack,affine transformation can defeat most of existing watermarking schemes. This paper proposes a watermarking algorithm based on the watermarking model with side-information and using Zernike moments of cover image.Employing dither modulation,watermark is coded and embedded by taking the Zernike moments of the normalized image as side information. It has been proved by experiments that this algorithm has high imperceptibility,high capacity,and is robust to affine transformation and JPEG lossy compression. |
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| Keywords: | watermarking side-information image normalization affine transformation Zernike moment |
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