Zoom and auto focus controls for video camera

Details Zoom and auto focus controls for video camera Zoom and auto focus controls for video camera

1991-04-10

1993-06-08

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

354404, H04N 5232, H04N 5225

Patent

active

052184447

ABSTRACT:
A video camera which is able to reverse the direction of the moving focus lens if appropriate evaluation data is not obtained within a certain period of time after an intermediate point is detected during the focus lens movement in one direction. This eliminates the redundant operation of the focus lens moving away from the just-focus point all the way to the extreme of the current direction before heading back to the just-focus point during an auto focus operation. An efficient auto focus operation is thus achieved. In addition, control is provided for not using a decrease in accumulated data as auto focus control information if that decrease is judged to be an abrupt drop from the accumulated data obtained in the immediately preceding focus lens position. This makes it possible to prevent the focus lens from being erroneously focused in cases of panning and other focus-disrupting operations. In this manner, the photographing of high quality is always made available.

REFERENCES:
patent: 4611244 (1986-09-01), Hanma et al.
patent: 4853788 (1989-08-01), Murashima et al.
patent: 4899190 (1990-02-01), Hata
patent: 4920420 (1990-04-01), Sano et al.
patent: 4969044 (1990-11-01), Hijikata et al.
patent: 4991944 (1991-02-01), Hirao et al.
patent: 5061954 (1991-10-01), Toyama et al.
European Search Report, Patent Abstracts of Japan, vol. 12, No. 413, Nov. 2, 1988.

Affiliated with

Also associated with

Rating

Zoom and auto focus controls for video camera does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Zoom and auto focus controls for video camera, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Zoom and auto focus controls for video camera will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1945956