Automatic exposure control device performing weighted light meas

Details Automatic exposure control device performing weighted light meas Automatic exposure control device performing weighted light meas

1994-09-01

1996-04-23

Kostak, Victor R.

Television

Camera, system and detail

Optics

348229, 348363, 354429, 354432, H04N 5238, H04N 5235

Patent

active

055108377

ABSTRACT:
An automatic exposure control device comprising a light measuring circuit for performing a weighted light measurement for a light measuring area set in a predetermined position within an image sensing plane, a discrimination circuit for detecting and evaluating the level of a luminance component in a video signal in each of a plurality of detecting areas set within the image sensing plane and for discriminating a photographic state while tracking a subject, and a compensation circuit for compensating a light measurement control signal produced by the light measuring circuit in accordance with a discriminating result made by the discriminating circuit.

REFERENCES:
patent: 4782357 (1988-11-01), Hayakawa et al.
patent: 4969005 (1990-11-01), Tokunaga
patent: 4969045 (1990-11-01), Haruki et al.
patent: 5021818 (1991-06-01), Satoh et al.
patent: 5049997 (1991-09-01), Arai

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