QR code recognition method based on image processing

An image processing and recognition method technology, applied in electromagnetic radiation induction and other directions, can solve problems such as high price, achieve strong real-time performance, high recognition rate, and solve the effect of complex image background

Active Publication Date: 2017-09-05
WAYZIM TECH CO LTD
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen that although foreign barcode reading equipment and software are relatively mature, they are expensive; and there is no fixed image barcode reader (or software) manufacturer in China, and the QR code recognition algorithm based on image processing and machine vision Research has great practical and economic significance

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  • QR code recognition method based on image processing
  • QR code recognition method based on image processing
  • QR code recognition method based on image processing

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Embodiment Construction

[0055] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0056] Such as figure 1 As shown, the QR code recognition method of the present invention mainly includes three stages of preprocessing, positioning and decoding. The preprocessing stage mainly includes four sub-steps of grayscale, image enhancement, binarization, and image denoising; the positioning stage is divided into determining the position information of 12 corner points on the QR code symbol position detection graph and determining the bottom right corner of the QR code symbol There are two parts of point position information; the decoding stage mainly includes two sub-steps of geometric correction and drawing sampling grid. These sub-steps are described one by one below.

[0057] 1. Pretreatment.

[0058] a) Grayscale. Generally, the collected QR code source image is a color image represented by the RGB color model, which needs to be graysc...

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Abstract

The present invention provides a QR code recognition method based on image processing, which includes the following steps: (1) preprocessing: including grayscale, image enhancement, binarization, and image denoising; (2) positioning: determining the QR code symbol The position information of 12 corner points on the position detection graph and the position information of the lower right corner of the QR code symbol are determined; (3) decoding: according to the various position information of the QR code symbol obtained in the positioning stage, geometric correction is performed to extract the standard QR code symbols, and then draw a sampling grid. The advantages of the present invention are: the method can be applied to the field of industrial production automation, realizes the automatic recognition function of the QR code without manual participation, and can solve the problem of complex image background, low image quality, and QR code position detection graphics in practical applications. Problems such as scale features being destroyed. The algorithm can achieve a high recognition rate of 98% under stable operation conditions. The algorithm has strong real-time performance, and it takes about 150ms to recognize a frame of image.

Description

technical field [0001] The invention relates to a QR code recognition method based on image processing, which is used for automatic control on an industrial production line. Background technique [0002] QR (Quick Response) code is a kind of two-dimensional code, which was invented by Japan's Densor Wave Company in 1994, and its corresponding ISO international standard ISO / IEC 18004 was approved in June 2000. [0003] Due to the characteristics of fast reading speed, high capacity density and strong error correction ability, QR code has been rapidly popularized and applied in various industries. Especially in recent years, driven by the tide of Internet and mobile networks, accompanied by the strong promotion of Internet giants such as Tencent, Ali, Baidu, etc., the application of QR codes emerges in an endless stream, constantly penetrating into all aspects of people's daily life. [0004] Although the application of QR codes in China has been very extensive, most of the d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/10
Inventor 程玉庭李功燕姚益
Owner WAYZIM TECH CO LTD
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