Defocus amount determining method and apparatus, device, and medium

Abstract

This application discloses a defocus amount determining method and apparatus, a device and a medium. The method includes: obtaining a target laser image; dividing the target laser image according to a division rule to obtain a plurality of first region images, where the division rule refers to dividing a to-be-divided image in a direction perpendicular to a laser line of the to-be-divided image; selecting a first region image with a confidence not less than a first threshold according to a confidence of each first region image, to obtain a first target region image; calculating a defocus amount mean value of all of the first target region images according to a defocus amount of each first target region image, to obtain a first defocus amount mean value; and determining a defocus amount in laser-based focusing according to the first defocus amount mean value. Fig 1.