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1983-11-04

1986-04-29

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358227, 358294, 354409, 35419513, 340753, 355 55, H04N 164, H04N 1387

Patent

active

045860904

ABSTRACT:
A device as described for indicating the state of focus of an image of a document which is converted into a video signal by sequentially inspecting the incident light level at points within the image and generating an electrical signal having a parameter which varies with the light level. The device includes:

REFERENCES:
patent: 3796951 (1974-03-01), Joseph
patent: 3945023 (1976-03-01), Stauffer
patent: 4183021 (1980-01-01), Gerstner
patent: 4264160 (1981-04-01), Aoki
patent: 4319238 (1982-03-01), Ogasawara et al.
patent: 4348666 (1982-09-01), Ogita
patent: 4383274 (1983-05-01), Imuiya
patent: 4473287 (1984-09-01), Fukuhara et al.

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