A method of and apparatus for comparing the location of an exten

Details A method of and apparatus for comparing the location of an exten A method of and apparatus for comparing the location of an exten

1989-12-01

1991-02-26

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358107, 382 22, 382 8, H04N 718

Patent

active

049965930

ABSTRACT:
Method of, and apparatus for, comparing the location of an extended feature within a field of view with a standard location. The field of view is scanned to obtain a binary video signal representing the feature, the signal is processed to give a single feature position pulse when scanning of the feature has been completed, the scan co-ordinates of the feature position pulse are determined, and the co-ordinates are compared with those corresponding to the standard location. The area of the feature may also be determined. The method is applicable to the checking of printed circuit boards.

REFERENCES:
patent: 4242662 (1980-12-01), Tsujiyama et al.
patent: 4479145 (1984-10-01), Azuma et al.
patent: 4908871 (1990-03-01), Hara et al.

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