Image reading apparatus and image forming apparatus equipped...

Details Image reading apparatus and image forming apparatus equipped... Image reading apparatus and image forming apparatus equipped...

2006-10-24

2006-10-24

Tran, Douglas Q. (Department: 2626)

Facsimile and static presentation processing

Facsimile

Picture signal generator

C358S509000, C358S475000, C382S274000, C382S254000

Reexamination Certificate

active

07126725

ABSTRACT:
In a document reading apparatus having a scanning exposure reading system by which a document placed on a platen is scanning exposed by an optical system and a document image is read out, or a document reading system by which a moving document is read out by an optical system, at the first collection position and the second collection position which are different in the sub-scanning direction of the scanning expose on a reference density plate, the first shading correction data and the second shading correction data are respectively read in the main scanning direction, and the shading position is corrected on the basis of the read first and second shading correction data.

REFERENCES:
patent: 5099341 (1992-03-01), Nosaki et al.
patent: 5214784 (1993-05-01), Ward et al.
patent: 6172784 (2001-01-01), Konda
patent: 6175660 (2001-01-01), Nabeshima et al.
patent: 6330083 (2001-12-01), Nabeshima et al.
patent: 6958834 (2005-10-01), Ide

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