Original-reading device with a movable reading unit

Details Original-reading device with a movable reading unit Original-reading device with a movable reading unit

1990-10-16

1992-06-23

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 67, 358461, 358496, 358498, 355 68, G06K 920

Patent

active

051250470

ABSTRACT:
An original-reading device includes a light source for irradiating an original disposed at a reading position, a photoelectric conversion device for converting light reflected from the original into an image signal, a reading unit supporting the light source and the photoelectric conversion device, a feeder for feeding the original to the reading position, a reference member provided at a position different from the reading position, for correcting an image signal from the original, and means for moving the reading unit between a position for reading the reference member and the reading position.

REFERENCES:
patent: 4578711 (1986-03-01), White
patent: 4602293 (1986-07-01), Sekine
patent: 4760464 (1988-07-01), Sakano
patent: 4806780 (1989-02-01), Yamamoto et al.
patent: 4823195 (1989-04-01), Ito
patent: 4907097 (1990-03-01), Sobue
patent: 4961117 (1990-10-01), Rumley
patent: 4970606 (1990-11-01), Shima
patent: 4984285 (1991-01-01), Kano et al.
patent: 4989100 (1991-01-01), Ishima

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