A Correction Method of Wrinkle Distortion QR Two-Dimensional Code

Abstract

The invention relates to a method for correcting wrinkle-distorted QR two-dimensional codes, which includes three parts: two-dimensional code corner point detection, linear deformation correction, and wrinkle correction. It is suitable for the case where one pair of sides of the two-dimensional code pattern is not distorted and the other pair of sides is distorted. First, eliminate the influence of linear deformation caused by the shooting angle and other reasons to obtain the first corrected image, and then use the shortest curve circumscribed method to correct the second A corrected image is corrected for wrinkle distortion to obtain a second corrected image, on which basis the two-dimensional QR code is decoded and recognized. Among them, the wrinkle distortion correction step includes edge contour extraction, edge contour interference electrical rejection, edge contour multi-function fitting, fitting function selection, internal point mapping function selection, mapping transformation correction, etc. The invention greatly improves the detection speed and recognition rate, and solves the problem of two-dimensional code correction and recognition for wrinkle distortion.

Description

technical field [0001] The present invention relates to a method for correcting two-dimensional codes, in particular to a method for correcting wrinkle-distorted QR two-dimensional codes, which is suitable for when a pair of sides of the original square QR two-dimensional code pattern is wrinkled and distorted due to various reasons. Correct the QR code. Background technique [0002] With the rapid development of information technology, people's rapid input and processing of information is becoming more and more urgent. In recent years, with the successful promotion of two-dimensional codes in business, more and more people use two-dimensional codes, and the research on two-dimensional code technology has become more important. However, the widespread application of two-dimensional codes brings another problem in the recognition of two-dimensional codes. The two-dimensional codes will have different degrees of linear deformation and nonlinear wrinkles due to the shooting an...

AI Technical Summary

Problems solved by technology

Tian Ruigan et al. proposed an improved two-dimensional barcode image correction algorithm for the deformation of two-dimensional barcode images under different conditions, as well as the low accuracy, large amount of calculation and poor universality of existing algorithms. The algorithm includes image vertex positioning, Three parts of perspective transformation and grayscale interpolation

[0004] At present, the existing algorithms for linearly distorted two-dimensional codes use corner detection to find the four corner points of the two-dimensional code, and obtain the correction figure according to the reverse perspective transformation. There is no corresponding algorithm and software

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