Frosted glass inner layer two-dimensional code recognition device and application method thereof

Abstract

The invention belongs to the technical field of machine vision, and particularly relates to a frosted glass inner layer two-dimensional code recognition device and an application method thereof. The frosted glass inner layer two-dimensional code recognition device comprises a shooting device, a polarizer, a polaroid and a light source device; and the central axis of the shooting device, the central axis of the polarizer, the central axis of the polaroid and the central axis of the light source device are located on the same vertical line; the light source device is used for emitting high-brightness linear polarized light, the polarizer is movably arranged at one end of the shooting device, and the polaroid is arranged on the upper end face of the light source device. By adopting a polarization method, the imaging problem of the frosted glass inner layer laser etching code point interfered by the frosted glass background is effectively solved, the gray scale contrast ratio of the two-dimensional code point and the frosted glass background is improved, the two-dimensional code is more easily and stably read successfully, the code reading time is shortened, the visual code reading rate is further improved, and through reading of code reading software, the requirement of large variability of industrial products can be met, and the code reading accuracy can reach 99.95%.

Description

technical field [0001] The invention belongs to the technical field of machine vision, and in particular relates to a device for identifying two-dimensional codes on the inner layer of frosted glass and an application method thereof. Background technique [0002] With the rapid development of electronic products in my country, the market has put forward higher requirements for the information security and traceability of mobile phones and digital electronic products. Smooth and transparent materials are different in each process, so the laser engraved two-dimensional code used to store product information on the inner layer of glass has different clarity caused by material interference, which greatly affects the ability of code reading equipment to read two-dimensional code information. Reading is directly related to the issue of product information security and traceability. [0003] In the prior art, the detection of the two-dimensional code engraved on the glass of the mob...

AI Technical Summary

Problems solved by technology

[0004] 1. Conventional light sources are not highly directional, and there is some afterglow diffusion, which is easy to brighten different frosted glass materials and reduce the contrast of the QR code;

[0005] 2. The two-dimensional code imaging is unstable and the reading rate is low;

[0006] 3. The imaging of the two-dimensional code is not clear, and it takes a long time to read the code, which affects the efficiency of visual recognition;

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