Workpiece hole site center positioning method based on multi-scale image feature matching

A workpiece hole site center positioning method based on multi-scale image feature matching relates to the technical field of machine vision measurement, and comprises the following steps: acquiring a workpiece hole site image; cutting the workpiece hole site image to obtain a template image with reserved hole site edge information; template features are extracted from the template image; mask processing is carried out on the template image, and areas outside the hole site area are removed; obtaining a to-be-matched workpiece image, and performing super-resolution multi-scale image feature matching on the template features and the to-be-matched workpiece image by using a pyramid template feature matching algorithm to obtain a hole site center position; according to the method, the problem that holes in special shapes, such as straight slotted holes and square holes, cannot be detected in a regular geometrical shape detection algorithm is solved, the problem that the hole site measurement precision is reduced