Apparatus and method mapping a look-up table in an imaging...

Details Apparatus and method mapping a look-up table in an imaging... Apparatus and method mapping a look-up table in an imaging...

2007-05-29

2007-05-29

Mehta, Bhavesh (Department: 2625)

Facsimile and static presentation processing

Static presentation processing

Attribute control

C358S443000, C358S505000, C358S530000, C708S009000

Reexamination Certificate

active

11433705

ABSTRACT:
The present invention provides a mapping method and apparatus of look-up table in an imaging system. The mapping method implemented by the apparatus comprises receiving a digital signal having a high-bit portion and a low-bit portion. The high-bit portion of the digital signal is subjected to a curve table for look-up mapping to get a high-bit signal. The partial high-bit portion is subjected to a slope table for getting a factor. The low-bit portion of the digital signal is calculated with the factor to get a low-bit signal. The high-bit signal is combined with the low-bit signal to get an output signal. The curve table and slope curve can reduce the memory usage of the imaging system.

REFERENCES:
patent: 4482975 (1984-11-01), King et al.
patent: 5123059 (1992-06-01), Hirosawa et al.

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