Image data processing method and apparatus therefor

Details Image data processing method and apparatus therefor Image data processing method and apparatus therefor

1987-07-17

1989-02-21

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358283, H04N 140

Patent

active

048070459

ABSTRACT:
A white reference density plate and a black reference density plate are provided in the vicinity of an original. A linear image sensor reads respective optical density of the white reference density plate and of the black reference density plate, whereby reference level data are fetched in an image data processing apparatus. The reference level data are subtracted from image data of the original for eliminating background components from the image data, so that new image data are obtained.

REFERENCES:
patent: 4578711 (1986-03-01), White
patent: 4601058 (1986-07-01), Seto
patent: 4641267 (1987-02-01), Asai
patent: 4691240 (1987-09-01), Kurusu
patent: 4734783 (1988-03-01), Horikawa

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