发明名称 |
Method and apparatus for automatic optical recognition of road signs |
摘要 |
A process and device for automatic recognition of an object such as a road sign includes a laser beam source providing a laser beam capable of passing through a modulator on which an intensity spectrum of reference signs and a sign to be recognized has been pre-recorded. A converging lens positioned downstream of the modulator, as well as devices for observing and/or analyzing the spectrum occurring at the focal plane of the lens. These devices include apparatus for detecting peaks indicating that a reference sign is identical to a sign to be recognized, as well as apparatus to separate those peaks from spurious peaks. As an example, this device can automatically recognize speed limit signs on roads or freeways.
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申请公布号 |
US5633944(A) |
申请公布日期 |
1997.05.27 |
申请号 |
US19950424084 |
申请日期 |
1995.04.19 |
申请人 |
AUTOMOBILES PEUGEOT;AUTOMOBILES CITROEN |
发明人 |
GUIBERT, LAURENT;ATTIA, MONDHER;SERVEL, ALAIN |
分类号 |
G02B7/00;B60R21/00;G01S17/88;G01S17/89;G02F1/01;G02F3/00;G06K9/74;G06T1/00;G08G1/0962;G08G1/0967;G08G1/16;(IPC1-7):G06K9/74 |
主分类号 |
G02B7/00 |
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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