| 分数傅里叶域图像数字水印方案 |
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| 引用本文： | 何泉,田瑞卿,王彦敏.分数傅里叶域图像数字水印方案[J].计算机工程与设计,2006,27(24):4642-4643,4647. |
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| 作者姓名： | 何泉 田瑞卿 王彦敏 |
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| 作者单位： | 北京化工大学,信息科学与技术学院,北京,100029;北京石油化工学院,信息工程学院,北京,102617 |
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| 基金项目： | 国家自然科学基金;北京化工大学校科研和教改项目 |
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| 摘 要： | 根据离散分数傅里叶变换（DFRFT），提出了一种基于分数傅里叶变换的图像数字水印方案。分数傅里叶变换具有空域和频城双城表达能力，可以对原始图像和水印信号分别进行不同阶次的分数傅里叶变换以增强水印安全性。将水印信号的分数傅里叶谱叠加在原始图像在视觉上的次重要分量上。在JPEG压缩、图像旋转、高斯低通滤波的攻击方式下，对水印图像进行了鲁棒性分析，实验表明该算法具有良好的鲁棒性。
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| 关 键 词： | 图像处理 离散分数傅里叶变换 数字水印 版权保护 鲁棒性 |
| 文章编号： | 1000-7024（2006）24-4642-02 |
| 收稿时间： | 2005-11-22 |
| 修稿时间： | 2005-11-22 |
Digital image watermarking in fractional Fourier transformation domain |
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| HE Quan,TIAN Rui-qing,WANG Yan-min.Digital image watermarking in fractional Fourier transformation domain[J].Computer Engineering and Design,2006,27(24):4642-4643,4647. |
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| Authors: | HE Quan TIAN Rui-qing WANG Yan-min |
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| Affiliation: | 1. Institute of Information Science and Technology, Beijing University of Chemical Technology, Beijing 100029, China; 2. Institute of Information Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China |
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| Abstract: | Based on discrete fractional Fourier transfrom(DFRFT),a digital image watermarking method in fractional Fourier transform domain is proposed.The FRFT has signal representation property both in space and frequency domain.The original image and the wate-rmark is transformed with different orders to improve watermarking security.The watermark in DFRFT domain is added to the secondary visual important part of the original image.The robustness of the watermark image under different attacks such as JPEG compression,image rotation and guassian low-pass filtering is analyzed and the results demonstrate that the embedding scheme has good performance of robustness. |
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| Keywords: | image processing discrete fractional Fourier transform digital watermarking copyright protection robustness |
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