Image signal processing apparatus

Details Image signal processing apparatus Image signal processing apparatus

1990-10-25

1993-03-02

Brinich, Stephen

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

H04N 140

Patent

active

051914395

ABSTRACT:
An image scanning reading system incorporates an image signal processing device for processing an image signal produced by a reading optical system. The image signal processing device includes an unsharp signal generator for averaging image signals S produced when image information on an original is scanned by the reading optical system, thereby to produce an unsharp signal U. The image signal processing device also includes an image signal generator for generating an image signal S' from the image signals S and the unsharp signal U according to the equation:

REFERENCES:
patent: 4591923 (1986-05-01), Urabe et al.
patent: 4903123 (1990-02-01), Kawamura et al.
patent: 4972256 (1990-11-01), Hirosawa et al.
patent: 5001573 (1991-03-01), Sakamoto et al.
patent: 5050223 (1991-09-01), Sumi
patent: 5051842 (1991-09-01), Shimazaki
patent: 5107346 (1992-04-01), Bowers et al.

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