Defect detecting method and apparatus

Details Defect detecting method and apparatus Defect detecting method and apparatus

1982-02-10

1985-01-08

McGraw, Vincent P.

Optics: measuring and testing

By inspection with agitation or rotation

Of containers

250223B, G01N 2190

Patent

active

044924763

ABSTRACT:
In a defect detecting method and apparatus, the image of a bottle under inspection, which is conveyed while being spun, is divided into picture elements arranged in a matrix form, signals representative of the picture elements are generated sequentially and repeatedly, and the signals of the picture elements, on the same imaginary line perpendicular to the central axis of the image, are compared with each other, and the result of the comparison is used to detect a defect such as a foreign matter or a scratch.

REFERENCES:
patent: 4376951 (1983-03-01), Miyazawa
patent: 4378495 (1983-03-01), Miller

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