White balance using combined feedback and external color informa

Details White balance using combined feedback and external color informa White balance using combined feedback and external color informa

1994-12-20

1996-08-06

Metjahic, Safet

Television

Camera, system and detail

Combined image signal generator and general image signal...

348655, H04N 973, H04N 907

Patent

active

055438369

ABSTRACT:
The disclosed image sensing apparatus includes a first circuit for forming a first signal to control gains of various color signals included in the outputs of an image sensing device in accordance with the levels of the various color signals, a second circuit for forming a second signal to control the gains of the various color signals in accordance with a color temperature of an object to be photographed, and a gain control circuit for controlling and determining the gains of the various color signals by mixing the first and second signals formed by the first and second circuits, in which a high accurate white balance adjustment is effected and the variation of the color temperature of the object is followed.

REFERENCES:
patent: 4700219 (1987-10-01), Tanaka et al.
patent: 4931856 (1990-06-01), Hieda et al.

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