Cowan, Liebowitz & Latman, P.C.
Focus detection apparatus and method, and image capturing apparatus
A focus detection apparatus comprising: a plurality of signal generation units that output pairs of image signals; a detection unit that detects first focus states of the imaging optical system based on the pairs of image signals without carrying out a predetermined digital filtering process, and detects second focus states of the imaging optical system based on the pairs of image signals that have undergone the predetermined digital filtering process, and reliabilities of the pairs of image signals; a selection unit that selects a second focus state to be used for focus control of the imaging optical system from among the second focus states based on the reliabilities; and an adjustment unit that, if a difference between the corresponding first and second focus states is greater than a threshold, decreases a possibility that this second focus state is selected.
Canon Kabushiki Kaisha
G G H H
G02B G03B H04N H04N
inventional inventional inventional inventional
Yasuyuki
Suzuki