Method for improving logistics express sheet feature information recognition rate through machine vision technology

The invention relates to a method for improving the identification rate of logistics express sheet feature information by using a machine vision technology, which comprises the following steps of: 1)reading a picture, preprocessing the picture, selecting a target area, and creating a template; 2) finding out a target based on a shape matching principle and determining a position; 3) repairing thepositioning angle difference after shape matching based on a mode of solving an included angle of a vector; and 4) carrying out threshold segmentation containing dynamic parameter adjustment on the image after angle correction, and then identifying the processed target area. The method is realized mainly based on programming on an HALCON platform, the specific processes of morphological analysisand positioning analysis processing of images and feature extraction are elaborated, and finally, a three-segment code classifier used for identifying express parcel sorting address information is trained. The three-segment cod