Title:
IMAGE CAPTURE DEVICE AND FOCUS CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2015/118727
Kind Code:
A1
Abstract:
The present invention provides an image capture device and focus control method whereby it is possible to achieve both improved phase difference auto-focus (AF) precision and reduced probability of missing a photo opportunity. This digital camera is provided with: a focus control unit (19, 11, 8) which computes a defocus degree using detection signals of pixels for phase difference detection (52) and drives a focusing lens according to the defocus degree; and a motion detection unit (18) which detects whether there is motion in a captured photographic subject image. The focus control unit computes the defocus degree according to an auto-focus instruction. If the defocus degree exceeds a threshold, the focus control unit will carry out phase difference AF again after driving the focus lens according to the defocus degree and complete the auto-focus. If the defocus degree is less than or equal to the threshold, the focus control unit will carry out phase difference AF only once and complete the auto-focus. If there is motion in the photographic subject image, the focus control unit raises the threshold beyond what the threshold would be if there were no motion.
Inventors:
TANAKA KOICHI (JP)
Application Number:
PCT/JP2014/077318
Publication Date:
August 13, 2015
Filing Date:
October 14, 2014
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B7/34; G02B7/28; G03B13/36; H04N5/232
Foreign References:
| JPS63172239A | 1988-07-15 | |||
| JPH0797173B2 | 1995-10-18 | |||
| JP2012128316A | 2012-07-05 |
Attorney, Agent or Firm:
ODAHARA Shuichi et al. (JP)
Shuichi Odawara (JP)
Shuichi Odawara (JP)
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