Image reading apparatus and light source stability...

Details Image reading apparatus and light source stability... Image reading apparatus and light source stability...

2008-03-11

2008-03-11

Safaipour, Houshang (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S003020, C358S515000, C358S516000

Reexamination Certificate

active

07342687

ABSTRACT:
A scanner has an imaging device which is constituted by a cold-cathode tube, includes a light source for irradiating light to a reflection surface of a reference white plate and a plurality of pixels arranged in one line, and detects light reflected on the reflection surface by the respective pixels, and has a light source stability determination unit which determines whether or not light amounts obtained by the one line of pixels from the light source are approximately uniform. Only in a case where the light source stability determination unit determines that the light amounts obtained by the one line of pixels from the light source are approximately uniform, the scanner reads the reference white plate to calculate correction values for the respective pixels and reads a manuscript.

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