Image capturing apparatus and method of controlling the same

Patent metadata

Field	Value
Publication number	US-9106827-B2
Application number	US-201414260225-A
Country	US
Kind code	B2
Filing date	Apr 23, 2014
Priority date	Apr 30, 2013
Publication date	Aug 11, 2015
Grant date	Aug 11, 2015

Abstract

An image capturing apparatus having an image sensor including focus detection pixels capable of outputting a pair of image signals for focus detection determines whether each line of the pixels of the image sensor is an addition/non-addition line that outputs the image signal suitable/unsuitable for detection of a correlation amount, obtains the correlation amount for each addition line based on the pair of image signals, add the obtained correlation amount of the addition line, counts the number of addition lines, obtains a defocus amount based on the added correlation amount, and drives a focus lens based on the defocus amount when a product of an evaluation value representing reliability of the defocus amount and a predetermined standard number of additions is smaller than the product of the number of addition lines and a standard evaluation value representing a predetermined evaluation value.

First claim

What is claimed is:

1. An image capturing apparatus comprising:
an image sensor including a plurality of pixels that are two-dimensionally arranged and include focus detection pixels including photoelectric conversion units configured for outputting a pair of image signals obtained by receiving a pair of light beams that have passed through different exit pupil regions of an imaging optical system;
a determination unit configured to determine whether each line of the pixels of s…

Assignees

• Canon Kk

Inventors

• Fukuda Koichi

Classifications

• H04N25/704

  Electricity · mapped topic

• H04N23/672 Primary

  Electricity · mapped topic

• G03B3/10

  Physics · mapped topic

• H04N25/713

  Electricity · mapped topic

• H10F39/8053

  Electricity · mapped topic