Image reader

Details Image reader Image reader

1989-05-12

1991-06-25

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 58, 350612, 350622, G06K 900

Patent

active

050274244

ABSTRACT:
An image reader is disclosed in which, upon application of an illuminating light beam to an original by an illuminating optical system, a light beam reflected from the original is applied through a contracting optical system to a line sensor for converting an optical image of the original into an image signal. The image reader has a first mirror provided for said original to reflect said light beam reflected from the original; a repetitive reflection optical system including a pair of parallel mirrors for causing said light beam reflected by the first mirror to go and return at least once in a reflection mode; and a second mirror provided for a contracting optical system to reflect the light beam thus caused to go and return towards the contracting optical system.

REFERENCES:
patent: 1593639 (1926-07-01), Reynolds
patent: 3463882 (1966-05-01), Herbold
patent: 3619028 (1971-11-01), Keene et al.
patent: 3758783 (1973-09-01), Sick et al.
patent: 3950712 (1976-04-01), Chenausky et al.
patent: 4012585 (1977-03-01), Chen
patent: 4040095 (1977-08-01), Abrams
patent: 4213157 (1980-07-01), DeBenedictis et al.
patent: 4547813 (1985-10-01), McGraw et al.

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