Method and apparatus for digitally processing gamma pedestal and

Details Method and apparatus for digitally processing gamma pedestal and Method and apparatus for digitally processing gamma pedestal and

1990-09-04

1992-07-21

Kostak, Victor R.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358168, H04N 5202

Patent

active

051327961

ABSTRACT:
A method and apparatus for gamma-correcting digital video data and for adjusting the video signal to a desired pedestal (black) level, gain (white) level, and a gamma correction value includes an apparatus for calculating digital values corresponding to a video signal having the desired gamma correction, black level and white level and a memory for storing the digital values. Uncorrected input digital video signals address the memory and cause the corresponding digital values stored in the memory, which represent the corrected video signal, to be output. The invention can be implemented in both software or hardware.

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patent: 4866513 (1989-09-01), Takahashi
patent: 4962433 (1990-10-01), Matsushima

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