发明名称 |
Method for recognizing a printed circuit board fiducial mark in order to decide origin point in chip mounter |
摘要 |
Disclosed is a method for recognizing a printed circuit board fiducial mark in order to decide an origin point in a chip mounter so that electronic parts can be mounted on a desired position of the printed circuit board. Since the method can be used for a distorted image, it can exactly recognize a damaged object as well as a general object. The method can also reduce a calculation amount relative to a polarity number of a candidate object when the candidate object has the polarity number. The method can recognize a candidate object of the same pattern fiducial mark regardless of its size.
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申请公布号 |
US5953447(A) |
申请公布日期 |
1999.09.14 |
申请号 |
US19970808503 |
申请日期 |
1997.02.27 |
申请人 |
DAEWOO ELECTRONICS CO., LTD. |
发明人 |
JIN, SANG-HUN |
分类号 |
H05K13/04;G06K9/52;G06K9/64;H05K1/02;H05K3/00;H05K13/08;(IPC1-7):G06K9/00 |
主分类号 |
H05K13/04 |
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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