Digital gamma correction

Details Digital gamma correction Digital gamma correction

1990-02-20

1992-02-11

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 32, 358 34, 358 80, 358164, H04N 964, H04N 969, H04N 972, G03F 308

Patent

active

050879669

ABSTRACT:
A digital color corrector for a color component of a video signal is operable to effect gamma, gain and black level correction. The gamma correction k is applied to a multiplier receiving the input signal E. Black level correction B is applied to an adder, and further arithmetic circuits are provided together with gain correction A to implement the equation

REFERENCES:
patent: 3604841 (1971-09-01), Ettlinger
patent: 4962418 (1990-11-01), Kamaga

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