Method and an apparatus for inspecting an external shape of an object having a symmetry
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United States of America Patent
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Jan 23, 1990
Grant Date -
N/A
app pub date -
Oct 24, 1986
filing date -
Oct 31, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An object is sensed by a photoelectric conversion sensor having a photoelectric conversion screen expressed as an XY coordinate grid such that the symmetrical axis of the object is parallel to one axis of the XY coordinate, coordinates at a plurality of right left points which 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 determined. Coordinates at a plurality of center points between the right and left points with respect to the other axis are determined, and the maximum frequency coordinate among the coordinates of center points in designated as a standard center coordinate, and the standard center coordinate is compared with each of the plurality of center coordinates.
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