Granular QR two-dimensional code positioning method

Abstract

The invention belongs to the technical field of image processing, in particular to a granular QR two-dimensional code positioning method. The method comprises the following steps: performing sequencelayering on a granular two-dimensional code image by utilizing a pyramid layering algorithm; extracting all contours in the sequence image by using an edge detection algorithm; traversing the rectangular positioning blocks in the search contour, determining the centers of the three positioning blocks of the granular QR two-dimensional code according to the condition that the rectangular positioning blocks meet the right-angled triangle, segmenting the required code area image, performing binarization operation on the code area image, and extracting the 0-1 value of the central point of the binarized image to form a bit map for decoding. According to the method, the problem that the granular QR two-dimensional code image cannot be positioned by directly utilizing the characteristics of theposition locator and the correction graph under the background of pit surface, fouling, abrasion or relatively strong noise is solved, and the positioning speed and the recognition rate of the granular QR two-dimensional code image are remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a granular QR two-dimensional code positioning method. Background technique [0002] QR two-dimensional code (Quick Response 2-dimensional bar code) is an image identification that uses a specific geometric figure to record data symbol information. The specific geometric figure is black and white distributed in a plane (two-dimensional direction) according to certain rules. alternate graphics. As a special label, the advantage of the two-dimensional code is that it can be marked directly on the parts through laser engraving, inkjet printing, printing, etc., which saves the intermediate process of printing labels and can achieve quality control during the assembly process and permanent traceability. With the vigorous development of the Internet of Things industry and manufacturing industry at home and abroad, two-dimensional code technology has the advantage...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to: aim at the deficiencies of the prior art, to provide a granular QR two-dimensional code positioning method, which can effectively solve the problem that the granular two-dimensional code image encounters pitted surfaces, stains, wear or strong noise. Due to the technical problem that it is impossible to directly use the position locator and the characteristics of the correction graphic to locate the two-dimensional code, it has significantly improved the recognition rate of the granular two-dimensional code image and accelerated the positioning speed of the granular two-dimensional code image.

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