Title:
FOCUS DETECTION DEVICE AND METHOD, AND PROGRAM AS WELL AS IMAGING DEVICE
Document Type and Number:
Japanese Patent JP2016038428
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a focus detection device that appropriately amplifies a signal in accordance with a focus detection condition when performing the focus detection on the basis of a phase difference between a pair of image signals obtained from an image pick-up element, and performs a highly accurate focus detection.SOLUTION: A digital camera is configured to calculate an amount of defocus relative to an in-focus position on the basis of a phase difference obtained from an amount of correlation calculated by first calculation means when it is determined that a mode is an operation mode with a heavy processing load. On the other hand, when it is determined that the mode is an operation mode with a light processing load, the digital camera is configured to calculate an amount of defocus relative to the in-focus position on the basis of a phase difference obtained from an amount of correlation calculated by second calculation means. Then, a focus detection is performed based on the calculated amounts of defocus.SELECTED DRAWING: Figure 10
Inventors:
KAWARADA MASAHIRO
Application Number:
JP2014160264A
Publication Date:
March 22, 2016
Filing Date:
August 06, 2014
Export Citation:
Assignee:
CANON KK
International Classes:
G02B7/34; G03B13/36; G03B15/00; H04N5/232
Attorney, Agent or Firm:
Another role Shigehisa
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