Title:
IMAGING DEVICE, AND FOCUS CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2014/155806
Kind Code:
A1
Abstract:
Provided is an imaging device with which a phase-difference amount can be efficiently calculated, and the speed of phase difference autofocus can be increased. An imaging element (5) is provided with imaging pixels (51), and phase-difference detection pixels (51R, 51L). When a video-imaging start instruction is present, a defocus-amount calculation unit (19) determines, in accordance with information related to F value, focal distance, and focus position, a shift amount for two output signal groups during correlation calculation. The defocus-amount calculation unit (19) performs correlation calculation by offsetting the two output signal groups by respective unit amounts within a range of the determined shift amount, and calculates the defocus amount from a result of the correlation calculation. If the distance to a main object subsequently changes, the preset shift amount is changed to a greater value.
Inventors:
ENDO HIROSHI (JP)
Application Number:
PCT/JP2013/079889
Publication Date:
October 02, 2014
Filing Date:
November 05, 2013
Export Citation:
Assignee:
FUJIFILM CORP (JP)
International Classes:
G02B7/28; G02B7/34; G03B13/36; H04N5/232
Foreign References:
| JP2013011783A | 2013-01-17 | |||
| JP2001100258A | 2001-04-13 | |||
| JP2013054261A | 2013-03-21 |
Attorney, Agent or Firm:
TAKAMATSU Takeshi et al. (JP)
Takamatsu 猛 (JP)
Takamatsu 猛 (JP)
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