Automatic gain control circuit for use in a television camera

Details Automatic gain control circuit for use in a television camera Automatic gain control circuit for use in a television camera

1990-05-24

1991-10-01

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Recording apparatus

35821319, 358211, H04N 5238, H04N 314, H04N 5335, H04N 530

Patent

active

050538772

ABSTRACT:
Apparatus is provided for controlling the aperture of an iris in a camera, such as a television camera. Samples of an image signal produced during a predetermined interval that have magnitudes greater than a threshold level are counted, and the difference between this count and a predetermined count is determined. The aperture of the iris is controlled as a function of this difference.

REFERENCES:
patent: 4516172 (1985-05-01), Miyata et al.
patent: 4734777 (1988-03-01), Okino et al.
patent: 4843476 (1989-06-01), Fujioka et al.
patent: 4969045 (1990-11-01), Haruki et al.

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