White balance correction apparatus

Details White balance correction apparatus White balance correction apparatus

1989-01-31

1991-05-14

Britton, Howard W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 29, H04N 964, H04N 973

Patent

active

050160940

ABSTRACT:
A white balance correction apparatus for electronic cameras is provided with a first photosensor which photometries a first light from the environment including a scene to be taken and a second photo sensor which photometries a second light from the scene. First and second identification circuits electrically identify the light sources of the first and second lights respectively based on electrical signals from the first and second photosensors. From the result of the identification of the light sources, an operation mode of a white balance correction circuit is selected from among three operation modes: one of a normal mode is which white balance correction is carried out according to a color temperature of the first light, a fluorescent lamp mode in which white balance correction is carried out to avoid a tinged image due to a fluorescent lamp, and a manual mode in which white balance correction is carried out according to a color temperature which is manually set is selected.

REFERENCES:
patent: 4584598 (1986-04-01), Kutaragi
patent: 4595946 (1986-06-01), Uehara et al.
patent: 4739393 (1988-04-01), Seki et al.
patent: 4774564 (1988-09-01), Konishi
patent: 4833525 (1989-05-01), Suzuki et al.

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