Facsimile and static presentation processing – Natural color facsimile – Scanning
Reexamination Certificate
2008-05-06
2008-05-06
Lee, Cheukfan (Department: 2625)
Facsimile and static presentation processing
Natural color facsimile
Scanning
C358S530000, C358S533000, C358S513000
Reexamination Certificate
active
07369283
ABSTRACT:
A color image reading apparatus reads an original image by a line sensor through sequentially lighting respective light sources of a plurality of colors with respect to a scan line. An analog-to-digital converter converts an analog image signal read by said line sensor to digital image data. A lighting frequency ratio setting part sets the lighting frequency ratio for the light sources such that not all of the light sources are equally lighted. A thinning control part performs thinning control of lighting lines according to the lighting frequency ratio at which the light sources are lighted. A read data combining part combines read data of the plurality of colors according to a predetermined combination, said read data being obtained by the thinning control.
REFERENCES:
patent: 4930008 (1990-05-01), Suzuki et al.
patent: 5191406 (1993-03-01), Brandestini et al.
patent: 5859712 (1999-01-01), Kim
patent: 0822706 (1998-02-01), None
patent: 5196894 (1993-08-01), None
U.S. Appl. No. 10/007,279, filed Nov. 12, 2001.
Cooper & Dunham LLP
Lee Cheukfan
Ricoh & Company, Ltd.
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