Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1985-06-17
1987-11-17
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358101, 382 8, H04N 718
Patent
active
047077344
ABSTRACT:
A system for detecting flaws in printed circuit boards. The circuit board is scanned by a video camera to provide a serial stream of bits each indicative of a picture element within a particular scan line. The serial stream of bits is formulated into binary numbers each representative of a contiguous path of picture elements composed of n.times.n picture elements. Each of these binary numbers are compared with a corresponding one of a set binary numbers stored in memory representative of a perfect master printed circuit board. Failure of the printed circuit board to match the stored master indicates a flaw. The invention also includes means to generate overlapping patches to insure detection of defects which occur in adjacent patches.
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Bryant Timothy E.
Labinger Richard L.
Tinnerino Natale F.
Grimes Edwin T.
Groody James J.
Kostak Victor R.
Masselle Francis L.
Murphy Thomas P.
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