Photometric system

Details Photometric system Photometric system

1979-10-31

1981-11-24

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

354 43, H04N 526, G03B 708

Patent

active

043027806

ABSTRACT:
A photometric system for use in an image pick-up device is disclosed. The photometric system comprises the steps of forming an image focussed by a camera lens system on a light receiver consisting of a plurality of charge transfer elements arranged in a picture element array; selectively deriving luminance signals of amplitude having a value within a range of about .+-.2 exposure values around a reference exposure value corresponding to a mean value between a maximum value and a minimum value of the amplitude of the luminance signals; and seeking a mean value of the selected luminance signals to photometrically measure the light of automatically selected portions on the average.

REFERENCES:
patent: 4037254 (1977-07-01), Monahan

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