Correction method for processing distortion of mobile phone image collected on assembly line

The invention relates to the technical field of image processing, in particular to a correction method for processing distortion of a mobile phone image collected on an assembly line. The method comprises the following steps: S1, setting a rectangular range of a shooting object for an acquired image, separating front and back sides, and performing perspective transformation for the first time; S2,for the image processed in the previous step, extracting a region of interest of the image; S3, setting the inclination degree grade of the mobile phone according to the minimum enclosing rectangle of the region of interest; S4, setting a proper edge convolution kernel H according to the inclination level; obtaining reliable four-side edge points through operation; S5, according to the reliable four-side edge points, fitting straight lines to form an optimal outer wrapping quadrangle; S6, constructing a sorting criterion of the four vertexes of the quadrangle; and S7, taking the four sorted points as input, and perfo