Methods, apparatus, equipment and media for determining defocus amount

Abstract

This application discloses a method, apparatus, device, and medium for determining defocus amount. The method includes: acquiring a target laser image; the target laser image refers to a laser image of a first target object acquired under actual focusing conditions; dividing the target laser image according to a division rule to obtain several first region images; wherein, the division rule refers to dividing the image along a laser beam direction perpendicular to the divided image; selecting first region images with a confidence level not less than a first threshold based on the confidence level of each first region image to obtain a first target region image; calculating the average defocus amount of all first target region images based on the defocus amount of each first target region image to obtain a first defocus amount average; and determining the defocus amount of laser focusing based on the first defocus amount average.

Images