Handheld uncalibrated image distortion correction method and system

The invention discloses a handheld uncalibrated image distortion correction method and system, and relates to the technical field of machine vision image processing, and the method comprises the steps: building a relation between a square defined by the circle centers of small round holes in a shot picture and a theoretical standard square, deducing a perspective transformation matrix, and carrying out the tangential distortion correction; image coordinates are corrected, and a radial distortion model is constructed; and solving a radial distortion coefficient according to the Taylor series, and carrying out radial distortion correction. According to the handheld uncalibrated image distortion correction method provided by the invention, the operation complexity is reduced and the correction efficiency is improved by directly analyzing the relationship between the structural characteristics generated by distortion and the pixel points, the radial distortion coefficient is described and directly estimated by ad