Exposure calculation device for camera

Details Exposure calculation device for camera Exposure calculation device for camera

1995-06-07

1998-04-14

Adams, Russell E.

Photography

Exposure control circuit

Color temperature compensation or detection

396275, G03B 700

Patent

active

057404810

ABSTRACT:
An exposure calculation device for use in a camera is, provided with a light metering device for effecting light metering in each of plural areas divided in the object field and generating a light metering signal, containing information relating to the color of the object in each area. A first judgment device judges, whether the object in each area is colored or uncolored based on the light metering signal, and determines colored areas in which the object is colored and uncolored areas in which the object is uncolored. A second judgment device judges whether a predetermined uncolored area contains a white or black object, based on the light metering signals from the colored areas and those from the uncolored areas. An exposure value determining device determines the exposure value according to the light metering signals, based on the results of judgment by the first and second judgment devices.

REFERENCES:
patent: 4335943 (1982-06-01), Numata
patent: 4511229 (1985-04-01), Schwartz et al.
patent: 4751542 (1988-06-01), Cibils Madero
patent: 4887121 (1989-12-01), Pritchard
patent: 5172146 (1992-12-01), Wooldridge
patent: 5424798 (1995-06-01), Takagi

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