发明名称 Watermark system
摘要 A method for examining an electronic representation of an item for a watermark, the method including examining at least a first electronic representation of an item for a watermark in accordance with a first watermark definition, receiving a signal indicating that a second watermark definition is to be used for examining electronic representations, and examining at least a second electronic representation of an item for a watermark in accordance with the second watermark definition.
申请公布号 US7200751(B2) 申请公布日期 2007.04.03
申请号 US20050053407 申请日期 2005.02.08
申请人 发明人
分类号 H04L9/00;G06K9/00;G06K9/36;G06T1/00;G09C5/00;G11B20/00;H04K1/00;H04N5/913;H04N7/16 主分类号 H04L9/00
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