Method and apparatus for controlling exposure of video camera

Details Method and apparatus for controlling exposure of video camera Method and apparatus for controlling exposure of video camera

1990-07-18

1992-07-07

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358209, 35821319, H04N 5238

Patent

active

051287692

ABSTRACT:
An exposure control apparatus receives a video signal from a scene pick-up image sensor and performs a divided brightness measuring for an image free. In accordance with the brightness distribution or a change amount of a scene obtained by the divided brightness measuring, the adjustment speed for a diaphragm is switched. In another embodiment, a scene brightness value for use as the exposure control is corrected to thereby obtain a smooth exposure control for continuous scenes. Scene pick-up by panning is detected by a built-in acceleration sensor in a video camera. Therefore, if the video camera is moved abruptly, then the exposure control is made slowly.

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