Method of and apparatus for distinguishing one workpiece from an

Details Method of and apparatus for distinguishing one workpiece from an Method of and apparatus for distinguishing one workpiece from an

1997-09-17

1998-11-10

Boudreau, Leo H.

Image analysis

Applications

Manufacturing or product inspection

382143, G06K 900

Patent

active

058356231

ABSTRACT:
A method is used for discerning a specific type of a work, including a plurality of specified contoured portions forming parts of the work, from an image including the subject work. Each specified contoured portion, which may be defined by geometric characteristics, such as an area, a peripheral length of a specified contoured portion and a ratio between the area and peripheral length, is recognized in the image based on two-valued image data into which many-valued image data representative of the subject work is transformed with a threshold value. A position of the subject work is discerned based on a relative position of each two specified contoured portions defined by geometric characteristics, such as a distance between centers of each two specified contoured portions and an angle of a center line of each two specified contoured portions relative to a center line of another two specified contoured portions.

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patent: 5058181 (1991-10-01), Ishihara et al.
patent: 5111516 (1992-05-01), Nakano et al.

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