Control method for a focusing device, focusing device, and imaging device

Abstract

The present invention provides a focusing device and a control method thereof, an imaging device, and a computer program. [Solution] The control method for the focus adjustment device includes: dividing one of the first image and the second image into multiple regions, searching for feature regions in the multiple regions, performing a correlation operation on each of the searched feature regions to obtain a correlation value, separately calculating the first defocus amount for each of the multiple feature regions, sorting the first defocus amounts in ascending or descending order, grouping the multiple feature regions by their respective first defocus amounts to obtain one or more feature groups, calculating the second defocus amount for each feature group based on the first defocus amount of each feature region for each feature group, calculating the confidence level for each feature group, and outputting the second defocus amount and confidence level for each feature group.

Images