Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1985-02-08
1986-04-08
Groody, James J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358107, 358101, 250223R, 250572, 356376, 356237, H04N 718
Patent
active
045816328
ABSTRACT:
An optical inspection system for articles moved by a conveyor, in which photo-electric transducers of one or more cameras are directed onto a transverse viewing area to detect light variations in individual articles. A threshold system permits correction for light signals in relation to the angular distance between the article being observed and the camera optical axis. A two-step inspection involves first detecting anomalous light levels, and subsequently detecting the size of each defect.
REFERENCES:
patent: 3543035 (1970-11-01), Raye et al.
patent: 3603457 (1971-09-01), Flodin
patent: 3872306 (1975-03-01), Palmer
patent: 4118732 (1978-10-01), Ichijima
patent: 4319270 (1982-03-01), Kimura et al.
patent: 4351437 (1982-09-01), Long
patent: 4493420 (1985-01-01), Dennis
Davis Walter L.
Messenger Dale
Randall Malcolm W.
Groody James J.
Key Technology Inc.
Kostak Victor R.
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