H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/32, 340/124.
H04N 7/18 (2006.01) G01B 11/02 (2006.01)
Patent
CA 1278089
ABSTRACT OF THE DISCLOSURE A method and an apparatus for inspecting an external shape of an object having a symmetry are proposed in which the object is picked up by a photoelectric conversion sensor and a video signal therefrom is processed by an electronic processor to thereby inspect good or bad of said object, and in which a photoelectric conversion screen of the sensor is expressed as an XY coordinate; the object is picked up by the sensor such that the symmetrical axis of the object is made parallel to one axis of the XY coordinate; on the basis of the video signal from the sensor, coordinates at a plurality of right and left points with respect to the other axis of the XY coordinate at which an external contour of the object intersects a plurality of straight lines perpendicular to the symmetrical axis are calculated; coordinates at a plurality of center points between the right and left points with respect to the other aixs are calculated; the maximum frequency coordinate among the coordinates of center points are calculated and then designated as a standard center coordinate; and the standard center coordinate is compared with each of the plurality of center coordinates.
521447
Gowling Lafleur Henderson Llp
Hajime Industries Ltd.
Yoshida Hajime
LandOfFree
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