Original image reading apparatus

Details Original image reading apparatus Original image reading apparatus

1994-11-17

1995-10-10

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Picture signal generator

358474, 358494, 355 84, H04N 104

Patent

active

054575478

ABSTRACT:
An original image reading apparatus, capable of simultaneously reading a reflective original and a transmissive original, with optimum shading corrections for both, is disclosed. For this purpose there are provided a shading data RAM of a line and a shading correction look-up table for each of the reflective and transmissive originals, and these RAM's and look-up tables are suitably switched according to a selection signal indicating the kind of the original.

REFERENCES:
patent: 4751584 (1988-06-01), Midorikawa
patent: 4760464 (1988-07-01), Sakano
patent: 4806780 (1989-02-01), Yamamoto et al.
patent: 4893196 (1990-01-01), Koshiyouji
patent: 4901157 (1990-02-01), Ohmori
patent: 4922335 (1990-05-01), Outa et al.
patent: 4972226 (1990-11-01), Kawai
patent: 4989099 (1991-01-01), Koshiyouji et al.
patent: 5014123 (1991-05-01), Imoto
patent: 5016096 (1991-05-01), Matsunawa et al.
patent: 5113268 (1992-05-01), Yoshida et al.

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