Image sensing apparatus having function of automatically matchin

Details Image sensing apparatus having function of automatically matchin Image sensing apparatus having function of automatically matchin

1988-08-31

1989-05-23

Ng, Jin F.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358228, H04N 5238

Patent

active

048335410

ABSTRACT:
In a video camera, a level of a high frequency component and a luminance level of a video signal in the same area set on a picture are detected to find a focus evaluating value and an exposure evaluating value. Automatic focusing control and automatic iris control are performed in response to these evaluating values. When it is determined that the detected exposure evaluating value fluctuated over a predetermined width or more, an automatic focusing operation is immediately stopped and performed again from the beginning if the automatic focusing operation is being performed, while the automatic focusing operation is prohibited from being started if the automatic focusing operation is being stopped.

REFERENCES:
patent: 4396951 (1983-08-01), Tanaka
patent: 4531158 (1985-07-01), Murakami et al.
patent: 4591919 (1986-03-01), Kaneda et al.
patent: 4614975 (1986-09-01), Kaite
patent: 4638364 (1987-01-01), Hiramatsu
patent: 4714966 (1987-12-01), Saito et al.
patent: 4734777 (1987-06-01), Okino et al.

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