Method and system for reading images with a movable light interc

Details Method and system for reading images with a movable light interc Method and system for reading images with a movable light interc

1990-04-17

1991-10-22

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 1, 382 65, 250237R, 356233, 355 55, 359232, 359227, 359683, G06K 942, H01J 314, G02B 1500, G01J 140

Patent

active

050602837

ABSTRACT:
An image reading method and apparatus includes detecting an optimal position of a slot of a light intercepting plate by reading an output level from a light sensor which receives light passing through the slit, moving the light intercepting plate to an optimal slit position in accordance with the read output level, and correcting any deviations in a scanning direction based on the amount the light intercepting plate is moved.

REFERENCES:
patent: 4341459 (1982-07-01), Sugiura et al.
patent: 4474460 (1984-10-01), Suzuki
patent: 4894682 (1990-01-01), Kondo et al.
Oriel Corporation "Optics and Fiters" Catalog vol. III.

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