Automatic optical inspection and sorting

Details Automatic optical inspection and sorting Automatic optical inspection and sorting

1978-04-20

1981-01-13

Clark, Conrad J.

Optics: measuring and testing

Document pattern analysis or verification

250223B, 356394, G06K 938, G06K 982, G06K 946, G01B 1100

Patent

active

042446503

ABSTRACT:
In this disclosure is described apparatus for automatic pattern or object recognition in which objects or goods with optically recognizable patterns are optically scanned for the pattern by passing the objects in front of optical sensor means where the light reflected from the object is received by the sensor means. In this disclosure there is described in detail apparatus for identifying and sorting various types of returnable bottles such as soft drink bottles by scanning across the bottles, the light reflected from the bottle graphics providing a coded signal or signature representing the bottle type. The identification is accomplished by considering such signature features as number of peaks, largest gap, area under curve, summation of difference between consecutive data points and the ratio of the area to the difference summation. The values obtained for the features are then matched with known feature bounds to provide the identification.

REFERENCES:
patent: 3724923 (1973-04-01), Fischer
patent: 3956629 (1976-05-01), Gomm
patent: 4047000 (1977-09-01), Bryant et al.
patent: 4175236 (1979-11-01), Juvinall

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