Title:
FOCAL POINT DETECTION DEVICE AND FOCAL POINT DETECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2015/049917
Kind Code:
A1
Abstract:
Provided are a focal point detection device and a focal point detection method enabling rapid focusing even for a largely defocused subject. A focal point detection device receives and photoelectrically converts a subject image divided into two images; executes a correlation operation on the basis of the pixel data in a standard portion and a reference portion corresponding to a prescribed AF area; and calculates a defocus amount. The focal point detection device includes a plurality of filters which has different frequency characteristics and filters the pixel data. The focal point detection device detects the contrast of subject image data consisting of a plurality of pixel data (S7); selects any one of the plurality of filters in accordance with the detection result (S9 to S13); and calculates the defocus amount by executing the correlation operation on the pixel data in the base portion and the reference portion on the basis of the pixel data that was filtered with the selected filter (S15).
Inventors:
YAMAZAKI YUKIE (JP)
KUNUGI KAZUMASA (JP)
OMATA YOSHINOBU (JP)
KIKUCHI TETSUO (JP)
KUNUGI KAZUMASA (JP)
OMATA YOSHINOBU (JP)
KIKUCHI TETSUO (JP)
Application Number:
PCT/JP2014/070174
Publication Date:
April 09, 2015
Filing Date:
July 31, 2014
Export Citation:
Assignee:
OLYMPUS CORP (JP)
International Classes:
G02B7/28; G02B7/34; G03B13/36; H04N5/232
Foreign References:
| JP2013171257A | 2013-09-02 | |||
| JP2005062728A | 2005-03-10 | |||
| JP2010008507A | 2010-01-14 | |||
| JP2009239425A | 2009-10-15 |
Attorney, Agent or Firm:
KOBAYASHI KAZUTADA (JP)
Kazutada Kobayashi (JP)
Kazutada Kobayashi (JP)
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