Manually operable document reading device for an image forming a

Details Manually operable document reading device for an image forming a Manually operable document reading device for an image forming a

1996-10-10

1998-12-22

Boudreau, Leo H.

Image analysis

Image sensing

Hand-held

382314, 382315, 358473, 235472, G06K 918

Patent

active

058526862

ABSTRACT:
An image reading device, particularly a hand scanner, capable of setting a reading position in the main scanning direction accurately at all times. A stage glass is affixed to the reading surface of the hand scanner. A reference line is printed on the stage glass outside of the valid reading range of a CCD (Charge Coupled Device) image scanner. For the adjustment of the valid reading range, the image sensor and a lens are roughly adjusted such that data representative of the reference line appears at the edge of the valid reading range. Subsequently, the valid reading range is electrically shifted in the main scanning direction such that the reference line disappears.

REFERENCES:
patent: 4860377 (1989-08-01), Ishigaki
patent: 5068913 (1991-11-01), Sugiura
patent: 5121226 (1992-06-01), Kubota et al.
patent: 5365605 (1994-11-01), Hosogoe et al.
patent: 5602379 (1997-02-01), Uchimura et al.

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