Method and device for accurately positioning two-dimensional bar code

A two-dimensional barcode and precise positioning technology, applied in the field of two-dimensional barcode recognition, can solve problems such as lack of clarity of two-dimensional barcode images, imaging system errors, etc.

Active Publication Date: 2015-01-21
SYSU CMU SHUNDE INT JOINT RES INST +2
View PDF5 Cites 17 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complex external environment that sometimes cannot be overcome by photography hardware equipment, such as poor focus, im

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
  • Method and device for accurately positioning two-dimensional bar code
  • Method and device for accurately positioning two-dimensional bar code

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0034] figure 1 It shows a flow chart of a method for precise positioning of a two-dimensional barcode in an embodiment of the present invention, including the following steps:

[0035] S101. Acquiring a two-dimensional image based on an image sensor;

[0036] S102. Perform image preprocessing on the collected two-dimensional image;

[0037] After the image sensor collects the two-dimensional image, image preprocessing is first performed on the captured image. T...

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 discloses a method and a device for accurately positioning a two-dimensional bar code. The method comprises the steps of carrying out image preprocessing on a two-dimensional image when an image sensor acquires the two-dimensional image; and completing binarization processing in the image preprocessing and carrying out accurate positioning on the two-dimensional image. The accurate positioning comprises the steps of carrying out primary positioning on a region where the two-dimensional bar code is located by depending on an image feature formed by a black-and-white module on the two-dimensional bar code after image pre-processing; and carrying out secondary traversal scanning on the primarily positioned two-dimensional code region and acquiring four vertexes of the two-dimensional code so as to realize accurate positioning. According to the embodiment of the invention, the method depends on the unique image feature formed by the black-and-white module on the two-dimensional bar code after preprocessing, that is, an obvious black-and-white contour line is provided, thereby carrying out primary positioning on the region where the two-dimensional code bar is located accurately as far as possible; and then secondary traversal scanning is carried out on the primarily positioned two-dimensional code region so as to realize accurate positioning finally.

Description

technical field [0001] The invention relates to the technical field of two-dimensional barcode identification, in particular to a method and device for precise positioning of two-dimensional barcodes. Background technique [0002] The QR code is composed of a series of dark modules with a distinctive graphic form. These modules are regularly arranged alternately to record information of a certain amount of data. The two-dimensional code will appear in the form of an image on the product or place that needs to be marked, and it itself carries the relevant information of these things. In addition to identifying information, QR codes are now used as media tools in financial activities or personal purchases and commercial activities, such as QR code scanning to purchase goods and QR code payment. The main steps of identification technology based on QR code are: [0003] First, the two-dimensional barcode image is collected. In the two-dimensional barcode image acquisition mo...

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
IPC IPC(8): G06K7/10
Inventor 胡建国谭宇泉李仕仁白小楠
Owner SYSU CMU SHUNDE INT JOINT RES INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap