Still video camera with color balance adjustment circuit respons

Details Still video camera with color balance adjustment circuit respons Still video camera with color balance adjustment circuit respons

1987-08-28

1989-05-02

Coles, Sr., Edward L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 41, 358909, H04N 973, H04N 904

Patent

active

048273325

ABSTRACT:
A still video camera includes a color temperature sensor for detecting the color temperature of ambient light which is used in the color balance adjustment of video signals outputted from an image pickup system. The camera further includes a strobe emission circuit which produces a signal indicating when strobe emission is capable of being performed. A control circuit controls the adjustment of the color balance of the video signals on the basis of the color temperature detected by the color sensor in the absence of a strobe ready signal. Upon the activation of a shutter release switch, the control unit determines whether or not a strobe ready signal is present. If a strobe ready signal is present, the control unit fixes the color temperature to a predetermined constant value for color balance adjustment. Color balance adjustment is therefore made on the basis of a fixed constant color temperature corresponding to strobe light photography only when strobe light emission is to actually occur and prevents color balance from being adjusted on the basis of the fixed constant color temperature when the strobe emission circuit is in a ready state, but strobe light photography is not to be performed.

REFERENCES:
patent: 4499487 (1985-02-01), Takayama et al.

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