Signal processing apparatus and method for offset compensation o

Details Signal processing apparatus and method for offset compensation o Signal processing apparatus and method for offset compensation o

1994-06-21

1995-10-03

Groody, James J.

Television

Camera, system and detail

Combined image signal generator and general image signal...

348257, 348222, H04N 516

Patent

active

054556228

ABSTRACT:
A bipolar CCD signal processing circuit and method in which offset in a non-zero dark level of the CCD signal which is induced by pixel-to-pixel gain adjustment is compensated by applying a proportionate amount of the gain compensation component of the gain signal to the gain-adjusted CCD signal to compensate for the gain-induced offset whereby the dark level of the gain-adjusted CCD signal is substantially restored on a pixel-to-pixel basis to its predetermined non-zero value. When gain-induced offset compensation is employed, the range of any separately applied compensation for pixel-to-pixel offsets, other than those induced by gain compensation, is substantially reduced.

REFERENCES:
patent: 4660082 (1987-04-01), Tomohisa et al.
patent: 5047861 (1991-09-01), Houchin et al.
patent: 5361140 (1994-11-01), Hayenga

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