White balance adjusting device

Details White balance adjusting device White balance adjusting device

1989-07-28

1991-09-03

Orsino, Joseph A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 41, H04N 973 C

Patent

active

050459279

ABSTRACT:
A white balance adjusting device comprising at least three optical sensors of different spectral sensitivity characteristics from one another, a computing circuit for calculating a ratio of outputs of the optical sensors, a ripple detecting circuit for determining whether or not light incident on the optical sensors contains ripples, a selecting circuit for selecting outputs of the computing circuit in accordance with an output of the ripple detecting circuit and a control signal forming circuit for producing control signals for controlling gains of color components of a color video signal in accordance with an output selected by the selecting circuit.

REFERENCES:
patent: 4595946 (1986-06-01), Uehara et al.
patent: 4843456 (1989-06-01), Iida et al.

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