Image reading and copying using plural illumination sources havi

Details Image reading and copying using plural illumination sources havi Image reading and copying using plural illumination sources havi

1995-05-24

1997-07-22

Brinich, Stephen

Facsimile and static presentation processing

Facsimile

Picture signal generator

358518, H04N 140

Patent

active

056508638

ABSTRACT:
An image reading apparatus includes, as an arrangement for discriminating a specific image with high precision, first illumination means for illuminating an object image so as to perform a normal reading operation, second illumination means for illuminating the object image with light having characteristics different from those of the light from the first illumination means so as to discriminate whether or not the object image is a specific image, and means for adjusting the quantity of light emitted from the first and second illumination means.

REFERENCES:
patent: 3912861 (1975-10-01), Vandling
patent: 4739377 (1988-04-01), Allen
patent: 5075787 (1991-12-01), Shaughnessy et al.
patent: 5212558 (1993-05-01), Obata et al.
patent: 5216498 (1993-06-01), Matsunawa et al.
patent: 5239392 (1993-08-01), Suzuki

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