Image reading apparatus and image density correction method

Details Image reading apparatus and image density correction method Image reading apparatus and image density correction method

2011-08-23

2011-08-23

Park, Chan S (Department: 2625)

Facsimile and static presentation processing

Facsimile

Picture signal generator

C358S471000, C358S472000, C358S500000, C358S461000, C358S420000, C382S312000, C382S274000, C382S167000, C382S275000

Reexamination Certificate

active

08004726

ABSTRACT:
A technique that can realize acquisition of a proper white reference value in shading correction is provided.It includes plural line sensors arranged at different positions from each other in a sub-scanning direction and configured to read reflected light from a reading target surface, guided by a scanning optical system that moves in the sub-scanning direction, and a reading control unit configured to control image reading timing in each line sensor so that, when reading a predetermined white reference board by the plural line sensors in order to perform shading correction, the plural line sensors have substantially the same reading area on the white reference board.

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