US 12,149,824 B2
Examination apparatus, control method thereof, and ophthalmic apparatus
Takashi Hanasaka, Tokyo (JP)
Assigned to CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Jan. 28, 2022, as Appl. No. 17/587,040.
Claims priority of application No. 2021-014432 (JP), filed on Feb. 1, 2021.
Prior Publication US 2022/0247935 A1, Aug. 4, 2022
Int. Cl. H04N 23/67 (2023.01); A61B 3/14 (2006.01); G06T 7/00 (2017.01); H04N 23/56 (2023.01); A61B 3/12 (2006.01)
CPC H04N 23/672 (2023.01) [A61B 3/14 (2013.01); G06T 7/0012 (2013.01); H04N 23/56 (2023.01); A61B 3/12 (2013.01); G06T 2207/30041 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An examination apparatus that performs examinations using an image of a subject captured by an image capturing element, the examination apparatus comprising:
a detection unit configured to perform focus detection by detecting the phase difference between a plurality of signals that are acquired from the image capturing element, and
a determining unit configured to determine a region in which to perform the focus detection in an angle of view,
wherein in a case in which the focus detection precision of a first subject is lower than a threshold, the determining unit determines a search region that passes through the first subject, and determines a region in which a second subject for which the focus detection precision is higher than the threshold is included in the search region as the region in which the focus detection.