Circuit of scanner to perform color space conversion on RGB...

Details Circuit of scanner to perform color space conversion on RGB... Circuit of scanner to perform color space conversion on RGB...

2001-12-27

2009-10-27

Safaipour, Houshang (Department: 2625)

Facsimile and static presentation processing

Natural color facsimile

Scanning

C358S515000, C358S530000, C358S500000

Reexamination Certificate

active

07609424

ABSTRACT:
A circuit of a scanner to perform a color space conversion on an RGB signal. The circuit has several sampling-amplified-offset devices to sample, amplify and compensate potential of an R charge signal, a G charge signal and a B charge signal to obtain an R analog signal, a G analog signal and a B analog signal. The circuit further has a gain adder to multiply the corresponding weighted gain with the R analog signal, the G analog signal and the B analog signal. The multiplication results are then summed up to obtain an addition analog signal. A multiplexer is also included to select between the R analog signal, the G analog signal, the B analog signal and the addition analog signal for output.

REFERENCES:
patent: 6052147 (2000-04-01), Cheng
patent: 6078686 (2000-06-01), Kim

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