| 发明名称 |
Variable guilloche and method |
| 摘要 |
A variable guilloche includes at least two guilloche curves, printed in a common space and having at least one point of overlap. The at least two curves are plotted from equations having variables corresponding to a specified data string of steganographic information. |
| 申请公布号 |
US8289579(B2) |
申请公布日期 |
2012.10.16 |
| 申请号 |
US20070699237 |
申请日期 |
2007.01.29 |
| 申请人 |
SIMSKE STEVEN J.;SANG HENRY;MUCHER PHILIPPE;HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P. |
发明人 |
SIMSKE STEVEN J.;SANG HENRY;MUCHER PHILIPPE |
| 分类号 |
H04N1/40;G06K9/00 |
主分类号 |
H04N1/40 |
| 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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