Image analysis – Applications – Manufacturing or product inspection
Patent
1997-04-25
2000-02-29
Boudreau, Leo H.
Image analysis
Applications
Manufacturing or product inspection
738658, 356426, G06K 900
Patent
active
06031933&
ABSTRACT:
The outer appearance of a golf ball (1) having a multiplicity of dimples (9) in its surface is inspected for detecting a defect (10) on the ball surface, by illuminating light to the golf ball (1), rotating the golf ball at a constant speed in one direction, operating a line sensor camera (4) to take a series of plurality of line images of the ball surface along a line (b) perpendicular to the rotational direction (a), the camera delivering image data including the line images, constructing a two-dimensional image from the image data, converting a brightness change appearing in the two-dimensional image in the rotational direction of the ball into a variation per preset unit, and subjecting the resulting variation data to binary processing on the basis of a threshold set between the variation associated with the dimple (9) and the variation associated with the defect (10), thereby detecting whether or not the defect (10) is present.
REFERENCES:
patent: 5517027 (1996-05-01), Nakagawa et al.
patent: 5568250 (1996-10-01), Nishiyama et al.
patent: 5703687 (1997-12-01), Kumagai et al.
patent: 5777244 (1998-07-01), Kumagai et al.
Boudreau Leo H.
Bridgestone Sports Co. Ltd.
Mehta Bhavesh
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