| 摘要 |
PROBLEM TO BE SOLVED: To utilize a document image in a box and watermark information effectively. SOLUTION: When a document image including watermark information is stored in a box, the watermark information (author information, pointer to original content, voice information, and the like) is extracted from the document image and stored separately so that the watermark information is reused. When the same watermark information has been stored already, it is not stored. COPYRIGHT: (C)2006,JPO&NCIPI
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