Image information read apparatus

Details Image information read apparatus Image information read apparatus

1986-06-04

1988-01-05

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358293, H04N 140

Patent

active

047179635

ABSTRACT:
In an image information read apparatus, shading distortion data of a light source are stored in a plurality of memory means, and the shading distortion data is read out of one of the memory means depending on a position of an original document. Content, of one of the plurality of memory means is retained even after the turn-off of a power supply. By this arrangement, a proper shading distortion correction is always attained at any position of the inserted original document even when the original document is partially scanned from an intermediate point, a proper initial value for shading distortion correction can be inputted so that a proper shading correction is attained to improve a quality of image.

REFERENCES:
patent: 3976833 (1976-08-01), Lavery
patent: 4149143 (1979-04-01), Hagano et al.
patent: 4174528 (1979-11-01), White
patent: 4408231 (1983-10-01), Bushaw et al.
patent: 4520395 (1985-05-01), Abe

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