| 抗大面积剪切的小波变换域图像水印算法 |
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| 引用本文： | 朱莉莉,侯迎坤,陈涛. 抗大面积剪切的小波变换域图像水印算法[J]. 泰山学院学报, 2010, 32(3): 34-39 |
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| 作者姓名： | 朱莉莉 侯迎坤 陈涛 |
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| 作者单位： | 1. 泰山学院,信息科学技术学院,山东,泰安,271021
2. 泰山学院,信息科学技术学院,山东,泰安,271021;南京理工大学,计算机科学与技术学院,江苏,南京,210094 |
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| 摘 要： | 本文提出了一个基于小波变换抵抗大面积剪切攻击的图像水印算法.该算法具有如下特点：基于小波变换域的块操作,把一幅二值图像水印同时嵌入到小波变换域低频带的多个块中,在提取水印时,通过多方案提取,能抵抗大面积剪切攻击;在嵌入水印前把水印进行Arnold变换,把水印信息置乱,消除像素的空间相关性,同时提高了水印信息的安全性和抗剪切的鲁棒性;把旋转和缩放这两种几何攻击联合应用于水印的提取,使提取的水印信息质量有了显著提高,同时提出了一种检验水印图像是否遭受过这两种几何攻击的新算法.实验结果表明,该算法所隐藏的水印不但可以抵抗大面积剪切攻击,还可以抵抗一般的信号处理,旋转、缩放、平移（RST）等几何攻击.
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| 关 键 词： | 数字水印 几何攻击 剪切攻击 小波变换 RST攻击 |
Image Watermarking Algorithm against Large Area Cropping in DWT Domain |
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| ZHU Li-li,HOU Ying-kun,CHEN Tao. Image Watermarking Algorithm against Large Area Cropping in DWT Domain[J]. Journal of Taishan University, 2010, 32(3): 34-39 |
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| Authors: | ZHU Li-li HOU Ying-kun CHEN Tao |
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| Affiliation: | 1.School of Information Science and Technology,Taishan University,Tai＇an,271021;2.School of Computer Science and Technology,Nanjing University of Science and Technology,Nanjing,210094,China) |
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| Abstract: | A new watermarking algorithm against large area cropping distortion in DWT domain is proposed.The features of the proposed algorithm included： applications of block operation and multi-method for extracting in order to against large area cropping;the security of watermarking and the robustness for cropping were improved by Arnold transform;applications of combining rotating and scaling for enhancing the quality of extracted watermarking,besides a new algorithm is proposed to check whether watermarked images are attacked by these two methods respectively or not.The experimental results showed that the watermarks generated by the proposed algorithm are robust against large area cropping,the common signal processing procedures,RST attacks etc. |
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| Keywords: | digital watermark geometric attack cropping attack wavelet transform RST attack |
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