Image reader

Details Image reader Image reader

1991-08-21

1992-09-08

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358461, H04N 140

Patent

active

051463512

ABSTRACT:
An image signals of a black reference plate, a white reference plate and a manuscript detected by an image sensor are converted into digital data by an A/D converter, and in the A/D conversion, the image signal of the black reference plate which is enhanced in level is applied to the A/D converter, and then the enhanced digital data for the black reference plate is returned to an original level, and a corrected image data which is represented by a difference of the image data of the manuscript and the image data of the black reference plate is issued.

REFERENCES:
patent: 3874799 (1975-04-01), Isaacs et al.
patent: 4040094 (1977-08-01), Everett et al.
patent: 4174528 (1979-11-01), White
patent: 4660082 (1987-04-01), Tomohisa et al.
patent: 4916549 (1990-04-01), Sekizawa

Affiliated with

Also associated with

Rating

Image reader does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image reader, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image reader will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-138874