| 一种基于数学形态学膨胀运算的文本数字水印 |
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| 引用本文： | 宾西川,裘正定,章春娥,曾高荣.一种基于数学形态学膨胀运算的文本数字水印[J].计算机安全,2009(11):4-6,10. |
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| 作者姓名： | 宾西川 裘正定 章春娥 曾高荣 |
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| 作者单位： | 北京交通大学,信息科学研究所,北京,100044 |
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| 摘 要： | 当文档图像中的字间距过小时,字移编码文本数字水印容量就会受到极大限制。通过构造两种结构元素,对灰度文档图像进行基于数学形态学的膨胀运算,增大了字符间距,并且算法能够很好地保持笔画完整性及文档整体视觉质量。对处理后的图像采用字移编码方式嵌入水印信息,增加了水印容量。
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| 关 键 词： | 二值化 数学形态学 结构元素 字移编码 文本数字水印 |
A Text Watermarking Based on the Dilation Operation of Mathematical Morphology |
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| BIN Xi-chuan,QIU Zheg-ding,ZHANG Chun'e,ZENG Gao-rong.A Text Watermarking Based on the Dilation Operation of Mathematical Morphology[J].Network & Computer Security,2009(11):4-6,10. |
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| Authors: | BIN Xi-chuan QIU Zheg-ding ZHANG Chun'e ZENG Gao-rong |
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| Affiliation: | (Beijing Jiaotong University Information Science Institute,Beijing 100044,China) |
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| Abstract: | The capacity of the word-shifting coding text watermarking is Iimited for text image＇s small character spacing. By constructing two kinds of structure elements, the dilation operation of mathematical morphology is done to increase the character spacing and simultaneously maintain the integrity of the strokes ＆ high visual quality in this paper, Based on word--shifting coding, the theoretical results and the empirical data have showed that embedding capac）ty of the processed image is much higher than that of the unprocessed image. |
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| Keywords: | Binary Mathematical morphology Structuring Element Word-shifting Coding text watermarking |
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