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QR code recognizing method based on image processing

An image processing and recognition method technology, applied in the direction of electromagnetic radiation induction, etc., can solve the problem of high price and so on

Active Publication Date: 2015-07-29
WAYZIM TECH CO LTD
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  • Application Information

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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 recognizing 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 invention provides a QR recognizing method based on image processing. The method includes the following steps of (1) preprocessing which includes graying, image enhancement, binaryzation and image denoising; (2) locating which includes determining position information of 12 angle points on a QR code sign position detection graph and position information of angle points at the right lower corner of the QR code symbol; (3) decoding which includes conducting geometrical correction according to various position information of the acquired QR code signs in the locating phase, extracting standard QR code signs and drawing a sampling network. The method has the advantage that the method can be applied to the automatic field of industrial production, achieves an automatic recognition function of QR codes without manual participation, and can solve the problem in actual application that the image background is complex, the image quality is not high, and the QR code position detection image proportional characteristics are damaged. The algorithm can reach the high identification rate of 98% under the stable operation condition. The algorithm is high in real-time performance. Time used by recognizing a frame of an image is about 150 ms.

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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IPC IPC(8): G06K7/10
Inventor 程玉庭李功燕姚益
Owner WAYZIM TECH CO LTD
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