Spot exposure adjustment circuit

Details Spot exposure adjustment circuit Spot exposure adjustment circuit

1981-11-10

1985-08-13

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

H04N 5193

Patent

active

045353646

ABSTRACT:
A television camera of the type having an image pickup element for converting the image of an object to be photographed into an electrical signal having an exposure control circuit with a voltage detector and controlling the exposure according to the voltage level of said electrical signals. A spot selection circuit provides the exposure control apparatus with signals corresponding to a portion of the image less than the entire image. The exposure of the entire image is controlled in accordance with the detected voltage levels of electrical signals corresponding to the image portion.

REFERENCES:
patent: 4318132 (1982-03-01), Machida
patent: 4325083 (1982-04-01), Rouchon et al.
patent: 4353092 (1982-10-01), Bailey et al.
patent: 4365272 (1982-12-01), Nagai
patent: 4409620 (1983-10-01), Enomoto

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