基于汉字结构特征和语义的文本数字水印算法  

Watermarking Chinese Text Document Based on Structure and Semantics of Chinese Characters

作　　者：罗梅[1] 张艳霞[2] LUO Mei, ZHANG Yan-xia （1.School of Information Technology Engineering, Tianjin University of Technology and Education, Tianjin 300222, China; 2.Disaster In- formation Engineering Department, Institute of Disaster Prevention, Beijing 101601, China）

机构地区：[1]天津职业技术师范大学信息技术工程学院,天津300222 [2]防灾科技学院灾害信息工程系,北京101601

出　　处：《电脑知识与技术》2011年第12期8902-8904,共3页Computer Knowledge and Technology

基　　金：天津市应用基础及前沿技术研究计划（10JCYBJC26100）;校级科研项目（自然）（KJ0816）

摘　　要：为了在中文文本中嵌入水印以保护版权,对汉字特征和语义进行了研究,并提出一种新的文本数字水印算法。根据汉字字型的四种不同结构定义了四条规则,用于将汉字文本转换成二进制串,并根据二进制串中"1"的个数的奇偶性来计算特征值。在嵌入水印时,通过语序变换、主动式与被动式间的转换、同义词替换、同音词替换、增删虚词及句子的压缩和扩展等自然语言处理技术来改变特征值,并将特征值嵌入到中文文本中。对一段文字进行了水印的嵌入和提取实验,实验证明该算法具有水印容量大、不可见性好、高鲁棒性、易于实现等优点。To watermark Chinese Text document to protect its copyright, this paper studied Structure and Semantics of Chinese Characters and presented a novel method of watermarking text document. According to four types of Chinese structure, four text binarization rules are made to convert Chinese text into bit string. The eigenvalue is determined by the number of ＂1＂ in the bit string. When embedding the watermark into the text, such natural Language processing technologies as word order change, the replacement of synonyms, the replacement of variant forms of the same word, the adding/deleting of the function words and the sentence compression and expansion are utilized to change the eigenvalue. An experiment is made to a paragraph of Chinese words. The result shows that the method can achieve a larger capacity, better imperceptibility and robustness and the method is feasible.

关 键 词：文本数字水印 文本二值化 语义转换 鲁棒性 

分 类 号：TP391[自动化与计算机技术—计算机应用技术;自动化与计算机技术—计算机科学与技术]