Exposure operation mechanism of camera

Details Exposure operation mechanism of camera Exposure operation mechanism of camera

1999-07-29

2000-12-26

Perkey, W. B.

Photography

Exposure control system responsive to distance

396225, 396234, G03B 700

Patent

active

061672009

ABSTRACT:
A mechanism, of a camera, to let an exposure operation be performed with a higher precision in a shorter time. The mechanism includes: a first device for taking an image of a region to be photographed and for outputting image information; a second device for detecting a subject region on the basis of the image information and for outputting subject region information; a third device for outputting a plurality of photometric values relative to a plurality of divided photometric regions; a fourth device for selecting and outtputting at least one of the photometric values which are output from the third device, on the basis of the subject region information; and a fifth device for calculating an optimal exposure value on the basis of the at least one, selected by the fourth device, of the photometric values.

REFERENCES:
patent: 4912495 (1990-03-01), Ishikawa et al.
patent: 5097281 (1992-03-01), Yamano et al.
patent: 5414487 (1995-05-01), Iwasaki
patent: 5592256 (1997-01-01), Muramatsu
patent: 5987265 (1999-11-01), Iwasaki

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