| 基于字符规范化的文档图像水印算法 |
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| 引用本文： | 李德鑫,朱宁波,刘伟.基于字符规范化的文档图像水印算法[J].计算机工程与设计,2007,28(19):4690-4691,4701. |
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| 作者姓名： | 李德鑫 朱宁波 刘伟 |
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| 作者单位： | 湖南大学,计算机与通信学院,湖南,长沙,410082 |
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| 摘 要： | 运用字符规范化和小波变换的知识,提出一种将文档图像分割成字符图像,再对字符图像规范化,然后将随机序列嵌入到小波图像低频系数的水印算法.根据视觉系统纹理掩蔽特性,将不同强度的水印分量嵌入到了不同的小波系数中.由于文档图像分割和规范化本身具有抗几何攻击的特性,故该方法对缩放、小角度旋转有一定的鲁棒性,实验结果表明:该方法在文档图像上比其它方法更具备优越性.
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| 关 键 词： | 几何攻击 文档图像 小波变换 图像水印 规范化 字符图像 图像规范化 文档图像分割 图像水印算法 normalization character based image watermarking 结果 实验 鲁棒性 旋转 小角度 方法 纹理掩蔽特性 抗几何攻击 小波系数 分量 不同强度 视觉系统 |
| 文章编号： | 1000-7024（2007）19-4690-02 |
| 修稿时间： | 2006-10-30 |
Document image watermarking based on character normalization |
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| LI De-xing,ZHU Ning-bo,LIU Wei.Document image watermarking based on character normalization[J].Computer Engineering and Design,2007,28(19):4690-4691,4701. |
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| Authors: | LI De-xing ZHU Ning-bo LIU Wei |
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| Affiliation: | School of Computer and Communication, Hunan University, Changsha 410082, China |
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| Abstract: | Knowledge on character normalization and wavelet transform is proposed that divide a document image into character image and normalize these character images,and embeds a random sequence watermarks into a lower frequency subband based on the wavelet coefficient distribution.By exploiting and depending on the feature of visual masking of human vision system,watermark components with different strength are embedded into different wavelet coefficients.Because division of document image and normalization of cha-racter image have a feacture against geometric distortion,this watermarking algorithm is more robust to ageometric distortions.The ex-periment prove that this algorithm is superior to other algorithm in document images. |
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| Keywords: | geometric distortion document image wavelet transform digital watermarking normalization |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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