发明名称 |
Locating curvilinear objects using feathered fiducials |
摘要 |
A method and apparatus for locating curvilinear objects of variable scale in digitized images using feathered fiducials. The leathered fiducials are constructed by: defining a range of tolerated object size scale variations; generating an enlarged submodel within the range of tolerated scale variations and assigning background pixel values exterior to the enlarged submodel; generating a reduced size submodel within the range of tolerated scale variations and assigning foreground pixel values to the reduced size submodel; disposing the reduced size submodel within and tangent to the enlarged submodel at the application point; uniformly changing grey scale pixel values in a graduated manner from foreground to background between the reduced size submodel and the enlarged one. The curvilinear objects are then located by conducting searches using the constructed fiducials.
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申请公布号 |
US5500906(A) |
申请公布日期 |
1996.03.19 |
申请号 |
US19940181328 |
申请日期 |
1994.01.14 |
申请人 |
COGNEX CORPORATION |
发明人 |
PICARD, LEN L.;BARBER, FREDERIC |
分类号 |
G06K9/46;(IPC1-7):G06K9/62 |
主分类号 |
G06K9/46 |
代理机构 |
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代理人 |
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地址 |
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