Image analysis – Histogram processing – For setting a threshold
Patent
1990-12-27
1992-02-04
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
382 22, 382 48, 358101, G06K 900
Patent
active
050864785
ABSTRACT:
A method is disclosed for determining the presence and position of fiducials on the surface of a printed circuit substrate in grey level images to sub-pixel accuracy. A summation profile technique is utilized to decrease the amount of computation required and thereby increase throughput for enabling real time operation in a total component placement system.
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IBM Technical Disclosure Bulletin, vol. 31, No. 10, pp. 222-228, "Assembly Technique for Placing Electronic Components on Printed Circuit Wiring Patterns", Mar. 1989.
IBM Technical Disclosure Bulletin, vol. 32, No. 7, pp. 66-70, "Improved Low-Mass Vacuum Pickup Device with Z-Axis Compliance", Dec. 1989, U.S.A.
IBM Technical Disclosure Bulletin, vol. 30, No. 1, pp. 228-234, "Surface Mounted Device Placement", Jun. 1987, U.S.A.
IBM Technical Disclosure Bulletin, vol. 32, No. 8A, pp. 5-6, "Illumination System for Robot Placement/Assembly Robot", Jan. 1990, U.S.A.
Kelly-Mahaffey William L.
Stafford James M.
Boudreau Leo H.
Bryant Andrea P.
International Business Machines - Corporation
Johns Andrew W.
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