Lead's position recognizing device

Details Lead's position recognizing device Lead's position recognizing device

1990-06-29

1991-04-09

Brinich, Stephen

Image analysis

Histogram processing

For setting a threshold

358107, G06K 900

Patent

active

050070975

ABSTRACT:
A lead's position recognizing device including device for detecting positions of maximum points and minimum points on each outline of each region surrounded by adjacent leads or positions of a pair of corners on diagonal of each outline and a device for detecting the lead's position from intersecting point of a straight line connecting midpoints between said maximum point and minimum point taken at a given proportion or midpoints on diagonal of a pair of corners also taken at a given proportion and the outline.
It features the possibility of recognizing the lead's position by the use as positional information of the maximum and minimum points of the outline or the positions of a pair of corners on the diagonal of the outline which remain unchanged even if the given IC parts are turned or have changes in shape such as burrs.

REFERENCES:
patent: 4644583 (1987-02-01), Watanabe et al.
patent: 4656896 (1987-04-01), Bietz et al.
patent: 4845764 (1989-07-01), Ueda et al.
patent: 4929843 (1990-05-01), Chmielewski, Jr. et al.

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