发明名称 |
Method of inserting hidden data into digital archives comprising polygons and detection methods |
摘要 |
The invention relates to a method of inserting a watermark into a digital archieve comprising polygons (e.g. a map) and of detecting the absence or presence of said watermark. The watermark does not alter the digital map in any noticeable manner and it cannot be modified by common isometric transformation.
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申请公布号 |
US2003208679(A1) |
申请公布日期 |
2003.11.06 |
申请号 |
US20030454318 |
申请日期 |
2003.06.04 |
申请人 |
LOPEZ VAZQUEZ CARLOS MANUEL |
发明人 |
LOPEZ VAZQUEZ CARLOS MANUEL |
分类号 |
G06T1/00;H04N1/32;(IPC1-7):H04L9/00 |
主分类号 |
G06T1/00 |
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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