Title:
撮影装置
Document Type and Number:
Japanese Patent JP5925966
Kind Code:
B2
Abstract:
A digital camera is provided with a frequency component extraction unit, an AR evaluation value acquisition unit, a variation calculation unit, and a moving speed control unit. The frequency component extraction unit has first and second filters, and extracts first and second spatial frequency components. The AF evaluation value acquisition unit integrates the first and second spatial frequency components to acquire first and second AF evaluation values. The variation calculation unit calculates a first variation corresponding to first-order differentiation of the first AF evaluation value, a second variation corresponding to first-order differentiation of the second AF evaluation value, and a third variation corresponding to second-order differentiation of the second AF evaluation value. The moving speed control unit controls the moving speed of a focus lens at the time of an AF operation based on the rates of increase or decrease of the first to third variations.
Inventors:
Fumio Nakamaru
Application Number:
JP2015529517A
Publication Date:
May 25, 2016
Filing Date:
July 18, 2014
Export Citation:
Assignee:
FUJIFILM Corporation
International Classes:
G02B7/28; G02B7/34; G02B7/36; G03B13/36; H04N5/232
Domestic Patent References:
| JP2009237327A | 2009-10-15 | |||
| JP2012053315A | 2012-03-15 | |||
| JP2007067862A | 2007-03-15 |
Attorney, Agent or Firm:
Kazunori Kobayashi