Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1987-01-02
1988-04-19
Shepperd, John W.
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 973
Patent
active
047393920
ABSTRACT:
A white balance adjusting apparatus has a plurality of sensors for producing color temperature detection signals dependent on a color temperature of an environment. An illuminance discriminating circuit produces an illumination discrimination signal indicating whether or not an illuminance of the environment is within a predetermined range. A color temperature discriminating circuit produces a predetermined color temperature detection signal from the color temperature detection signals. A standard color temperature setting circuit sets and outputs one of a plurality of standard color temperature signals for each of a plurality of color temperature regions. A white balance correction control circuit is controlled in dependence on the illumination discriminating signal, the predetermined color temperature detection signals, and the standard color temperature signals so as not to carry out an erroneous white balance adjustment even when the illuminance of the environment is extremely high or low.
REFERENCES:
patent: 4584598 (1986-04-01), Kutaragi
patent: 4616253 (1986-10-01), Hashimoto et al.
patent: 4682210 (1987-07-01), Ikemura et al.
Ueda Kazuhiko
Yukoyama Shozo
Shepperd John W.
Victor Company of Japan Ltd.
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