Document scanner

Details Document scanner Document scanner

1987-11-13

1990-10-02

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358466, 358475, 358463, H04N 104

Patent

active

049611178

ABSTRACT:
A document scanner for utilization with a word processing and/or graphics processing equipment, such as a personal computer environment. The document scanner provides improved pixel compensation and gamma compensation techniques as well as improved control in the illumination process of the scanning of a document.

REFERENCES:
patent: 3833761 (1974-09-01), Hovek
patent: 4385318 (1983-05-01), Miller
patent: 4466021 (1984-08-01), Hibbard
patent: 4571638 (1986-02-01), Schneider
patent: 4575768 (1986-03-01), Sakai
patent: 4578711 (1986-03-01), White
patent: 4623923 (1986-11-01), Orbach
patent: 4647976 (1987-03-01), Nakagaki
patent: 4700236 (1987-10-01), Abe
patent: 4709274 (1987-11-01), Tanioka
patent: 4727434 (1988-02-01), Kawamura
patent: 4731862 (1988-03-01), Tsuda
patent: 4779029 (1988-10-01), Henderson

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