Automatic exposure adjusting apparatus for automatically adjusti

Details Automatic exposure adjusting apparatus for automatically adjusti Automatic exposure adjusting apparatus for automatically adjusti

1990-06-26

1992-05-05

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358209, 35821319, H04N 5238

Patent

active

051113015

ABSTRACT:
An automatic exposure adjusting apparatus for use in a video camera automatically adjusts exposure based on a video signal obtained from an image sensing circuit. The automatic exposure adjusting apparatus detects a luminance signal level of the video signal and detects a first mean value which is a simple mean value per unit area of an image sensed picture. The automatic exposure adjusting apparatus also outputs a second mean value weighted every area in accordance with a luminance distribution in the image sensed picture. The automatic exposure adjusting apparatus controls the adjustment of exposure based on the first and second mean values. Such weighting of the luminance level in accordance with the luminance distribution is carried out based on the fuzzy inference.

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