White balance adjustment device for a still-video camera having

Details White balance adjustment device for a still-video camera having White balance adjustment device for a still-video camera having

1995-04-28

1996-08-27

Metjahic, Safet

Television

Camera, system and detail

Combined image signal generator and general image signal...

348224, 354413, 354430, H04N 973, H04N 5225

Patent

active

055505872

ABSTRACT:
A white balance adjusting device has a white balance sensor for sensing a color temperature and an image-object distance sensing mechanism. The image-object distance sensing mechanism senses the image-object distance using a CCD by which the object image is sensed. The image frame is sub-divided into a plurality of sectors, and the image-object distance is sensed for each sensor. The white balance adjustment is performed by changing coefficients corresponding to the color temperature of the ambient daylight and the flash of light. For a sector in which the image-object distance is short, since the effect of the electronic flash is large, the coefficient corresponding to the color temperature of the flash of light is set to a high value. For a sector in which the image-object distance is long, since the effect of the electronic flash is small, the coefficient of the color temperature of the flash of light is set to a low value.

REFERENCES:
patent: 4847680 (1989-07-01), Okino
patent: 5001552 (1991-03-01), Okino
patent: 5087936 (1992-02-01), Ogata et al.
patent: 5132825 (1992-07-01), Miyadera
patent: 5283632 (1994-02-01), Suzuki et al.

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