Photography – With exposure objective focusing means – focusing aid – or... – Reliability of focus/distance signal
Patent
1995-06-30
1997-08-19
Metjahic, Safet
Photography
With exposure objective focusing means, focusing aid, or...
Reliability of focus/distance signal
396124, G03B 300
Patent
active
056598122
ABSTRACT:
An optimum focus detection algorithm range is established in the focus detection area corresponding to the subject pattern. The method includes establishing a first region on the photoelectric conversion array; computing the contrast of the subject image in the first region based on the output signal strings of a plurality of photoelectric conversion elements contained in the first region; establishing a portion of the first region as a second region; and computing the contrast of the subject image in the second region based on the output signal strings of a plurality of photoelectric conversion elements contained in the second region. Subsequently, either the first region or the second region must be determined as the focus detection algorithm range based on the contrast of the first region and the contrast of second region. The focus adjustment condition of the shooting lens is computed based on the output signal strings of the first region or the second region, whichever is selected as the algorithm range.
REFERENCES:
patent: 5001507 (1991-03-01), Iida et al.
patent: 5051767 (1991-09-01), Honma et al.
patent: 5068682 (1991-11-01), Utagawa
patent: 5469240 (1995-11-01), Uchiyama et al.
patent: 5481329 (1996-01-01), Uchiyama et al.
patent: 5483318 (1996-01-01), Hamada et al.
patent: 5485002 (1996-01-01), Kusaka
patent: 5485003 (1996-01-01), Kusaka
Metjahic Safet
Nelson Eric
Nikon Corporation
LandOfFree
Focus detection device and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Focus detection device and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focus detection device and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1113910