专利检索 ap:("BEIJING FOUNDER ELECTRONICS CO" OR "UNIV BEIJING" OR "UNIV PEKING FOUNDER GROUP CO") AND inv:"SHI WENZHE" 第 1 页

1.

发明公开
A METHOD AND DEVICE FOR EMBEDDING DIGITAL WATERMARK INTO A TEXT DOCUMENT AND DETECTING IT 有权
标题翻译：方法和装置嵌入数字水印在文本文档和用于检测

公开(公告)号：EP1956823A4

公开(公告)日：2008-11-12

申请号：EP06741765

申请日：2006-04-29

申请人： BEIJING FOUNDER ELECTRONICS CO , UNIV BEIJING , UNIV PEKING FOUNDER GROUP CO

发明人： YANG BIN , SHI WENZHE , QI WENFA , CHENG SHENGYUAN , WANG LIDONG

IPC分类号： H04N1/32 , H04N1/387

CPC分类号： H04N1/32203 , H04N1/32219 , H04N1/32352 , H04N2201/3205 , H04N2201/3208 , H04N2201/3214 , H04N2201/3221 , H04N2201/3266 , H04N2201/3281 , H04N2201/3284

摘要： Amethod and device for embedding digital watermarkinto a text document and detecting it, whichbelongs :o a technical art of document protection.The method and device are accomplished byrepeatedly printing a layer of shading forrecording a mass of watermarkinfromation at the bottom of the normal document idditionally, the shading composed of the grids arranged by a certainrule, the change of the grid's position recording the eachbit string inthe information flow of the watermark.With the method and device, it is possible to increase the amount of the hidden information, wherein the watermarkinformation embedded into the shading svill be diffused along with the document, ifnecessary, it is possible to detect afterthe document is digitized by a scanner.