Video camera with automatic focusing function

Details Video camera with automatic focusing function Video camera with automatic focusing function

1990-01-30

1991-12-31

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

354402, H04N 5232

Patent

active

050776134

ABSTRACT:
A video camera with an automatic focusing device includes a pre-process unit for eliminating a direct current component from a signal of the video camera and controlling the obtained signal so that the amplitude thereof can be at a constant level, which is disposed at the preceding stage of a signal processing unit for operating the focusing condition of an object from the signal of the video camera. An amplitude of a video signal to be inputted to the signal processing unit can be largely suppressed, thus providing a largely simplified circuit structure of a signal processing unit.

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patent: 4903135 (1990-02-01), Ohtake et al.
patent: 4959726 (1990-09-01), Miida et al.

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