Automatic focusing apparatus for automatically adjusting focus i

Television – Camera – system and detail – Optics

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

354402, 348353, 348355, H04N 5232

Patent

active

053194624

ABSTRACT:
An automatic focusing apparatus of a video camera automatically matches a focus in response to a video signal obtained from an image sensing circuit. The automatic focusing apparatus detects the level of a high frequency component of the video signal in order to supply a focus evaluating value which takes a maximum value in an in-focus position. A focusing motor controlling circuit performs an automatic focusing operation by a hill-climbing servo system based on the supplied focus evaluating value. A determination is made by employing a fuzzy inference with respect to the initialization of the direction of movement of a lens when the automatic focusing operation starts, the selection of a focusing area from a plurality of areas, and the reactivation of the automatic focusing operation due to a change of an object after once the automatic focusing operation is completed.

REFERENCES:
patent: 4531158 (1985-07-01), Murakami et al.
patent: 4614975 (1986-09-01), Kaite
patent: 4638364 (1987-01-01), Hiramatsu
patent: 4833541 (1989-05-01), Takuma et al.
patent: 4841370 (1989-06-01), Murashima et al.
patent: 4853788 (1989-08-01), Murashima et al.
patent: 4853789 (1989-08-01), Murashima et al.
patent: 4860243 (1989-08-01), Ueno
patent: 4872058 (1989-10-01), Baba et al.
patent: 4903134 (1990-02-01), Murashima et al.
patent: 4920420 (1990-04-01), Sano et al.
patent: 4922346 (1990-05-01), Hidaka et al.
patent: 4967279 (1990-10-01), Murashima et al.
patent: 4969045 (1990-11-01), Haruki et al.
patent: 5003339 (1991-03-01), Kikuchi et al.
patent: 5083150 (1992-01-01), Nagasaki et al.
patent: 5084754 (1992-01-01), Tomikata
patent: 5111232 (1992-05-01), Tsunefuji
patent: 5210562 (1993-05-01), Hiyazawa et al.
patent: 5223981 (1993-06-01), Kaneda

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Automatic focusing apparatus for automatically adjusting focus i does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Automatic focusing apparatus for automatically adjusting focus i, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Automatic focusing apparatus for automatically adjusting focus i will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-797274

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.