发明名称 |
Electronic document, genuineness management method for print medium thereof, genuineness management system, program, and program recording medium |
摘要 |
A method for managing genuine characteristics of both an electronic document and a print medium comprising: a step for recognizing image data contained in the electronic document; a step for applying an extraction condition of an image feature previously determined and must be considered to the recognized image data to calculate a coordinate set corresponding to a pixel or a set of pixels, constituting the image feature; a step for recognizing at least a coordinate value among coordinate values and pixel color values, corresponding to each of coordinates constituting the coordinate set, and for embedding the recognized coordinate value as a code of a digital watermark into the pixel or the pixel set, constituting the image feature, or into an area in the vicinity; and a step for outputting the electronic document where the digital watermark embedding process operation has been carried out to the print medium.
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申请公布号 |
US7224820(B2) |
申请公布日期 |
2007.05.29 |
申请号 |
US20030378113 |
申请日期 |
2003.02.28 |
申请人 |
HITACHI, LTD. |
发明人 |
INOMATA HIROFUMI;MATSUKI TAKESHI;YOSHIURA HIROSHI;NOYAMA HIDEO |
分类号 |
G06F17/21;G06K9/00;G06T1/00;G09C1/00;G09C5/00;H04L9/32;H04N1/32;H04N1/387 |
主分类号 |
G06F17/21 |
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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