Image scanner

Details Image scanner Image scanner

1987-08-14

1988-09-13

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

382 48, 382 61, 33140, 340709, G06K 922

Patent

active

047714751

ABSTRACT:
In an image scanner including an original bed, a feeding means for feeding an original placed on the original bed, and an image sensor adapted to be scanned across the original in a direction perpendicular to a paper feeding direction of the original; the improvement comprising a pointer adapted to be moved in parallel to a plane of the original and point a scan starting position and a scan ending position on the original, an encoder for detecting a quantity of movement of the pointer, and a setting means for setting the scan starting position and the scan ending position according to an output signal from the encoder.

REFERENCES:
patent: 3541248 (1970-11-01), Young
patent: 3584142 (1971-06-01), Schoeffler
patent: 3832485 (1974-08-01), Pieters
patent: 4242574 (1980-12-01), Grant
patent: 4268179 (1981-05-01), Long et al.
patent: 4581761 (1986-04-01), Ichinokawa et al.

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