Method for positioning and identifying laser character of beer bottle cap

A positioning recognition and character technology, which is applied in character and pattern recognition, instruments, computer parts, etc., can solve the problem of difficult recognition of characters on bottle caps, and achieve the effect of ensuring accurate positioning

Inactive Publication Date: 2013-02-27
XIAN UNIV OF TECH
View PDF4 Cites 39 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a positioning recognition method of laser characters on beer bottle caps, which solves

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 for positioning and identifying laser character of beer bottle cap
  • Method for positioning and identifying laser character of beer bottle cap
  • Method for positioning and identifying laser character of beer bottle cap

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0053] The working principle of the laser character positioning recognition method for beer bottle caps of the present invention is: the laser code for beer bottle caps is composed of two parts, namely the prescribed special character "A" (called the locator) and five variable numeric characters. All character positioning includes two parts: coarse positioning and fine positioning. Coarse positioning is positioned to the position of the locator, and fine positioning finds the image rotation angle through the locator image, and corrects the image and locates the character. The information of the locator template records the gray information of the locator template when the template rotates to various angles when the template is rotated at a certain step length. It is used to match the bottle cap image to be matched, so that character recognition can be realized at any angle.

[0054] The working principle of coarse positioning is: reduce the resolution of the bottle cap image and 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 for positioning and identifying a laser character of a beer bottle cap, which comprises the following steps: step 1, character positioning which comprises coarse positioning and fine positioning, that is, carrying out binaryzation, corrosion expansion, edge detection, contour tracing and Hough transform processing on a positioning character image, searching an angle between the straight lines on which two edges of the positioned character A are positioned, calculating a rotating angle of the character, searching coordinates of the center of the bottle cap, translating the center of the bottle cap to the center of an original bottle cap image, aligning the bottle cap image according to the calculated rotating angle of the character and repositioning the character; and step 2, character division and identification, wherein the character identification comprises the steps of extracting a 13 characteristic, extracting a protection statistical characteristic, extracting a coarse grid characteristic and finally carrying out matched identification on the character on the basis of the three character characteristics by utilizing a template matching method. The method disclosed by the invention aims at the character image of the bottle cap, which has a complex background and nonuniform illumination and implements the positioning on the laser character of the beer bottle cap, which rotates at a random angle.

Description

technical field [0001] The invention belongs to the technical field of character recognition of electronic supervisory codes, and relates to a positioning and recognition method of laser characters on beer bottle caps. Background technique [0002] In recent years, the research on electronic supervision code character recognition in the field of Internet of Things printing and packaging has achieved a large number of research results, which are widely used in license plate recognition, printing and packaging symbol recognition and other occasions. Under the current character recognition conditions, because the image quality to be recognized is generally good, the contrast of the target area is large, the target is still, and only rotates at a small angle, the noise interference is small, and the recognition accuracy is high. [0003] The positioning of laser characters on beer bottle caps is realized by image matching. The laser characters on beer bottle caps are composed o...

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): G06K9/20G06K9/54
Inventor 武吉梅李晶
Owner XIAN UNIV OF TECH
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