发明名称 |
Method and system for embedding information in document |
摘要 |
A method and a system for embedding information in document data that include text written in a page description language. First, an analysis is made of the layout of the document data in which information is to be embedded. Then, based on the analysis of the layout, a sequence of locations is generated whereat the information is to be embedded. A page description of the text at a determined location is changed in accordance with the embedded information. As a result, the information is embedded in document data that include text written in a page description language. The sequence of locations is generated by producing a string of sequential pseudo-random numbers.
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申请公布号 |
US6782509(B1) |
申请公布日期 |
2004.08.24 |
申请号 |
US19990396945 |
申请日期 |
1999.09.15 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
HIRAYAMA YUKI;AMANO TOMIO;SHIMIZU SHUICHI;MORIMOTO NORISHIGE |
分类号 |
G06F12/14;G06F17/21;G06F21/24;G06T1/00;G06T11/60;(IPC1-7):G06F17/00;G06K9/34 |
主分类号 |
G06F12/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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