White balance control with choice of control dependent on bright

Details White balance control with choice of control dependent on bright White balance control with choice of control dependent on bright

1989-04-11

1991-09-03

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 41, H04N 973

Patent

active

050459287

ABSTRACT:
A white balance correction circuit includes a first correction signal forming circuit for forming a first white balance correction signal on the basis of an output of a colorimetric sensor, a second correction signal forming circuit for forming a second white balance correction signal on the basis of an output of a color image sensor, and a selection circuit for selecting one of the first and second control signals in accordance with a brightness or color saturation of an object to be photographed, so that the color image sensor produces an image signal having a white balance controlled in accordance with the first or second white balance correction signal selected by the selection circuit.

REFERENCES:
patent: 4395730 (1983-07-01), Shen
patent: 4605955 (1986-08-01), Hashimoto et al.
patent: 4635126 (1987-01-01), Kinoshita
patent: 4727413 (1988-02-01), Miura et al.
patent: 4811086 (1989-03-01), Hieda
patent: 4823185 (1989-04-01), Miyamoto et al.
patent: 4833525 (1989-05-01), Suzuki et al.

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