基于字符拓扑结构的文本数字水印技术

Text Digital Watermarking Technology Based on Topology of Alphabetic Symbol

提出了一种新的基于人类心理认知特征的文本数字水印技术,通过改变字符(或者字符串)字形的拓扑结构,设计出语义上相同的字符(或者字符串)的多种字形,并对这些字形的拓扑结构进行恰当的编码,利用字符(或者字符串)的拓扑结构来携带数字水印信息.该技术同时具有携带隐藏信息容量大、鲁棒性强、视觉影响小、抗攻击能力强的特点.

A novel text digital watermarking technology based on human psychological cognitive model is presented in this paper. Through changing the topology of a character or string, different structure figures are schemed out, which represent the same semanteme, and these figures should be correctly encoded. With this technology, digital watermarking information is embedded in different topology of a character or string. The text digital watermarking technology has the following advantages： great capacity of watermarking, strong robustness, little visual influence and quite good attack-resisting capability.