| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve invisibility of paper documents and indivisibility with contents, and to record robust additional information against the repetitive copy. <P>SOLUTION: A parameter value series extractor 301 extracts a parameter value series concerning the document style in character strings from inputted document data, an information coder 303 generates a coded information series shifted by a shift quantity concerning specified code series generated by a code series generator 302 with taking additional information to be embedded in the document data as the shift quantity, a corrected parameter value series generator 304 generates a corrected parameter value series with the coded information series combined with the parameter value series, and a document corrector 305 corrects the document data according to such corrected parameter value series. <P>COPYRIGHT: (C)2007,JPO&INPIT |
