Image analysis – Histogram processing – For setting a threshold
Patent
1988-04-11
1993-02-23
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
358101, G06K 900
Patent
active
051897075
ABSTRACT:
A method and an apparatus for grasping surface mounted devices such as an IC or the like by the hand of the robot and automatically and accurately loading them onto the contact pattern of a printed circuit board by means of an image processor are disclosed. According to this method, a measurement line is provided onto each image pattern of the pin array of the surface mounted device and the array of the contact pattern of the board, so that it may intersect at right angles with the direction of the pattern, and each position of the pin array and the array of the contact pattern is sought from the variation of the brightness on that line. In accordance with the result thus obtained, displacement of the position and that of the rotation over the entire surfaced part and the contact pattern are sought and the operation of the robot is controlled in accordance with that information.
REFERENCES:
patent: 4628464 (1986-12-01), McConnell
patent: 4630225 (1986-12-01), Hisano
patent: 4803735 (1989-02-01), Nishida et al.
patent: 4845764 (1989-07-01), Ueda et al.
IBM Technical Disclosure Bulletin, vol. 26, No. 7B, Dec. 1983, pp. 3664-3666 "Component Position Recognition Method and Device for an Assembly Robot".
Patent Abstracts of Japan, vol. 5, No. 202, Dec. 22, 1981, p. 95.
Fujii Kenjiro
Hata Seiji
Kawasaki Kyoichi
Nishida Yoshien
Shimura Yasunori
Boudreau Leo H.
Hitachi , Ltd.
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