Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Correction Method of Wrinkle Distortion QR Two-Dimensional Code

A correction method and distortion correction technology, applied in the field of two-dimensional code correction, can solve problems such as low accuracy, poor universality, and large amount of calculation, so as to improve the detection speed and recognition rate, and solve the problem of correction and recognition.

Active Publication Date: 2021-08-10
NANJING UNIV OF POSTS & TELECOMM
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Correction Method of Wrinkle Distortion QR Two-Dimensional Code
  • A Correction Method of Wrinkle Distortion QR Two-Dimensional Code
  • A Correction Method of Wrinkle Distortion QR Two-Dimensional Code

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] This embodiment provides a method for correcting wrinkle-distorted QR two-dimensional codes. The process is as follows: figure 1 As shown, it includes three parts: two-dimensional code corner detection, two-dimensional code linear deformation correction, and two-dimensional code wrinkle distortion correction. The decoding and identification part can be carried out by using existing mature software and hardware algorithms.

[0026] First, obtain an image containing a QR two-dimensional code, record the original coordinates of each pixel of the image, and detect the corners of the two-dimensional code on the image. Using the corner detection algorithm of two sets of straight lines to approximate, the two sets of straight lines from far to Closely approach the two-dimensional code until it is tangent to the two-dimensional code, record the number of tangent points, and find out the group with the least number of tangent points among the two groups of lines, and the center ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

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...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/14
CPCG06K7/1417G06K7/1452G06K7/146
Inventor 陈陶闵增卫韩静蕾张一驰谌静
Owner NANJING UNIV OF POSTS & TELECOMM
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com