Patent ID: 8842195

Claim:
An image pickup apparatus comprising: an imaging unit including a plurality of imaging pixels disposed on a plurality of lines, the imaging pixels performing a photoelectrical conversion at an exposure timing different between each line; a flicker detecting unit configured to detect variation information of illumination intensity based on an image signal obtained from the imaging unit; a flicker correction value generating unit configured to generate a flicker correction value for performing a flicker correction for an image signal obtained from the imaging unit based on the variation information of the illumination intensity; a flicker correcting unit configured to perform the flicker correction for a pair of image signals that are obtained from the imaging unit by performing a photo electrical conversion for a pair of light beams obtained by performing a pupil division in a direction different from the line, based on the flicker correction value; and a correlation calculating unit configured to perform a correlation calculation using the pair of image signals for which the flicker correction has been performed in the flicker correcting unit.