Image analysis – Histogram processing – For setting a threshold
Patent
1983-09-21
1985-09-24
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
356398, 356237, G06K 900
Patent
active
045436592
ABSTRACT:
In a pellet pattern recognition method, a pellet pattern recognition apparatus is used which includes a table for determining a pellet pick-up priority order, pellet memory table for storing data of good and bad pellets as well as data representing an "already picked-up" state and a "not picked-up" state, and position memory table for storing a positional shift of each of the good pellets within a pellet pattern recognition range away from the picked-up pellet. When the good pellets are to be sequentially picked up, the shape identification and position detection of the pellets within the pellet pattern recognition range are effected by calculating the correlation coefficients. In this case, calculation is performed with respect to the pellet array on the basis of the results of the shape identification and position detection and initially set reference data, and the good pellet is stored, as the corresponding coordinate data, in the pellet memory table.
REFERENCES:
patent: 3617744 (1971-11-01), Irish
patent: 3909602 (1975-09-01), Micka
patent: 4496056 (1985-01-01), Schoenig, Jr. et al.
A Preprint of Lectures: 80' Internepkon Japan; Semiconductor Exhibit Hironaka et al., "Introduction of a Pattern Recognition System into a Semiconductor Bonding Step," Jan. 1982.
Boudreau Leo H.
Murray Michael M.
Tokyo Shibaura Denki Kabushiki Kaisha
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