Automatic focusing device for video camera

Details Automatic focusing device for video camera Automatic focusing device for video camera

1984-12-19

1987-03-03

Rubinson, Gene Z.

Facsimile and static presentation processing

Facsimile

Recording apparatus

354430, H04N 326

Patent

active

046479791

ABSTRACT:
An automatic focusing device for a video camera in which undesirable defocusing caused by the presence of an unwanted object moving through the field of view between the photographing lens and the desired object is eliminated. The output of automatic focusing sensor, which may be a line sensor or area sensor, is alternately stored in two memories. The contents of the two memories are compared and discriminated to determine when an unwanted object has moved into the photographing field. This is effected by detecting the presence of a change beginning at one end of the sensor. When such is detected, the automatic focusing operation is inhibited for a predetermined period of time.

REFERENCES:
patent: 4273430 (1981-06-01), Fritsche
patent: 4382665 (1983-05-01), Eguchi
patent: 4383274 (1983-05-01), Inuiya
patent: 4531158 (1985-07-01), Murakami

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