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A method for quickly locating damaged QR codes based on image redundancy information

A technology of redundant information and QR codes, applied in image enhancement, image analysis, graphics and image conversion, etc., can solve the problems of unable to transplant algorithms and slow down the speed of positioning, so as to reduce the number of image traversals, avoid excessive waste, and improve effect of effect

Active Publication Date: 2021-05-11
JIANGSU SEUIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Deep learning relies on GPU and other hardware devices with parallel computing, which further slows down the positioning speed for barcode scanning devices with backward hardware, and even cannot effectively transplant the algorithm

Method used

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  • A method for quickly locating damaged QR codes based on image redundancy information
  • A method for quickly locating damaged QR codes based on image redundancy information
  • A method for quickly locating damaged QR codes based on image redundancy information

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Embodiment Construction

[0087] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0088] Such as figure 1 As shown, the method for quickly locating damaged QR codes according to image redundancy information disclosed by the present invention includes the following steps:

[0089] Step 1, grayscale processing is performed on the picture containing the QR code to obtain the grayscale picture;

[0090] Step 2, evaluate the sharpness of the grayscale image by random sampling;

[0091] Step 3, filter and edge detect the grayscale image through an adaptive threshold;

[0092] Step 4, determine the width of the stripe by the detected edge, and determine the three positioning patterns of the QR code according to the width ratio of the stripe;

[0093] Step 5, determine the QR code area through three positioning patterns, and then combine the...

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Abstract

The invention discloses a method for quickly locating a damaged QR code according to image redundancy information. The steps include: performing grayscale processing on a picture containing the QR code; performing clarity evaluation on the grayscale picture; and filtering the grayscale picture and edge detection; determine the three positioning patterns of the QR code according to the width ratio of the stripes; combine the size of the positioning pattern to adaptively binarize the QR code area; find the four edges of the QR code through affine transformation, and finally use the homography Transform for positioning correction. The method for quickly locating damaged QR codes makes full use of the redundant information in the image, reduces the number of image traversals as much as possible, and improves the algorithm speed; uses adaptive threshold edge detection and adaptive threshold binarization to improve edge detection and binarization effect; filtering unclear images can avoid excessive waste of computing resources.

Description

technical field [0001] The invention relates to a method for rapidly locating a damaged QR code, in particular to a method for rapidly locating a damaged QR code according to image redundancy information. Background technique [0002] QR code (Quick Response Code, quick response matrix code) is a two-dimensional code, which has the advantages of high information storage density, strong fault tolerance, etc., and can realize fast positioning through its obvious positioning pattern, so it has been widely used. [0003] With the development of informatization, all walks of life are aiming at reducing labor costs and improving the level of informatization, and the simple, low-cost, and fast-reading QR code labels have become the first choice of major industries. By pasting the QR code label and identifying it on the factory assembly line, the whole process of production and assembly of each part can be automatically recorded, so as to realize rapid product traceability and good ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/14G06T3/00G06T5/20G06T7/13G06T7/136
CPCG06K7/1417G06K7/1443G06K7/1452G06K7/146G06T3/0006G06T5/20G06T2207/10008G06T2207/20024G06T7/13G06T7/136
Inventor 吴俊斌顾善中田晓明
Owner JIANGSU SEUIC TECH CO LTD
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