发明名称 |
Method of determining the living character of an element carrying a fingerprint |
摘要 |
The present invention concerns a method of determining the living character of an element carrying a fingerprint, consisting of making impedance measurements at various points on the said element by means of electrodes. The method according to the invention is characterised in that it consists of determining whether the said impedance measurements satisfy a law of variation of the impedance measured by the said electrodes as a function of the surface area of the said electrodes covered by the said elements such that Z=f<SUB>Dt</SUB>(S).
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申请公布号 |
US2006140456(A1) |
申请公布日期 |
2006.06.29 |
申请号 |
US20030539822 |
申请日期 |
2003.12.19 |
申请人 |
FONDEUR JEAN-CHRISTOPHE;FOURRE JOEL-YANN;LAMBERT LAURENT |
发明人 |
FOUNDEUR JEAN-CHRISTOPHE;FOURRE JOEL-YANN;LAMBERT LAURENT |
分类号 |
G06K9/00 |
主分类号 |
G06K9/00 |
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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