Autofocus control device having moving body tracking control

Details Autofocus control device having moving body tracking control Autofocus control device having moving body tracking control

1995-09-07

1997-11-25

Metjahic, Safet

Photography

Object motion detection

396154, G03B 300, G03B 1318, G03B 708

Patent

active

056921187

ABSTRACT:
An autofocus control device to perform lens drive control with moving body tracking control. The autofocus control device includes a defocus amount computation device to determine a defocus amount representing an amount of deviation in the optical axis direction of an image formed by the lens and an image forming plane. A drive position computation device computes a position to which the photographic lens is to be driven based upon the defocus amount. A first drive direction computation device and a second drive direction computation device both determine a direction in which the lens is to be driven based upon different information. A field travel speed computation device computes a field travel speed for the subject based upon computed drive positions for the photographic lens. A moving body determination device determines whether the subject is a moving body when the drive directions determined by the first and second drive direction computation devices are the same, and the field travel speed determined by the field travel speed computation device is greater than a predetermined value. When the moving body determination device determines that the subject is a moving body, the photographic lens is driven at a speed computed according to lens drive positions computed by the drive position computation device.

REFERENCES:
patent: 4783677 (1988-11-01), Hamada et al.
patent: 4924250 (1990-05-01), Hamada et al.
patent: 5179407 (1993-01-01), Kusaka et al.
patent: 5208625 (1993-05-01), Suekane
patent: 5239332 (1993-08-01), Muramatsu et al.
patent: 5270763 (1993-12-01), Ogasawara
patent: 5424776 (1995-06-01), Hirasawa
patent: 5448051 (1995-09-01), Yamano
patent: 5448329 (1995-09-01), Nakata
patent: 5502537 (1996-03-01), Utagawa

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