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A fast two-dimensional code positioning method with variable step size

A positioning method and two-dimensional code technology, applied in the field of fast two-dimensional code positioning with variable step size, to achieve the effects of good practicability, high positioning success rate and precise positioning

Active Publication Date: 2022-04-01
SUNLUX IOT TECH GUANGDONG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to solve the defects existing in the existing two-dimensional code positioning technology in complex situations, and provide a fast two-dimensional code positioning method with variable step size, through which fast and accurate two-dimensional code positioning can be realized

Method used

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  • A fast two-dimensional code positioning method with variable step size
  • A fast two-dimensional code positioning method with variable step size
  • A fast two-dimensional code positioning method with variable step size

Examples

Experimental program
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Embodiment 1

[0039] This embodiment discloses a fast two-dimensional code positioning method with variable step size, its frame diagram can refer to the attached figure 1 As shown, the specific steps include:

[0040] Step 1: Use a camera to take a picture of a QR code.

[0041] Step 2: Perform fast mean filtering on the image obtained in step 1. A large amount of noise in the image can be removed by using the fast mean filter algorithm, and it takes less time. Noise will cause wrong variable step size and affect the positioning accuracy.

[0042] Step 3: Convert the image obtained in step 2 into a grayscale image. Because the QR code is black and white, it is important to convert it to a grayscale image to increase the calculation speed.

[0043] Step 4: Scan the two-dimensional code by using the variable step size method, and save the important information (details are introduced in the second embodiment). Wherein, the large step size Ls is preset as 3, and the small step size Ss is...

Embodiment 2

[0047] This embodiment discloses a fast two-dimensional code positioning method with variable step size. For the flow chart of variable step size, please refer to the attached Figure 4 As shown, the specific steps of variable step size include:

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Abstract

The invention discloses a fast two-dimensional code positioning method with variable step length, comprising the following steps: S1, acquiring a two-dimensional code image; S2, performing fast mean value filtering on the acquired two-dimensional code image, S3, processing step S2 Convert the image into a grayscale image; S4, use the variable step length method to scan the two-dimensional code, the scanning method is divided into horizontal scanning and vertical scanning steps; S5, according to the variable step length scanning results, quickly get each image The precise position of the graphics; S6. Finally, realize the positioning of the two-dimensional code according to the coordinates of the center points of the three image-finding graphics. The variable step size method of the present invention is mainly to reduce the time for image scanning and improve the positioning accuracy of the two-dimensional code. The scanning density of the image-finding pattern part is small (large step length Ls). Fast and accurate two-dimensional code positioning can be realized through the invention.

Description

technical field [0001] The invention relates to the fields of optical communication and image recognition, in particular to a fast two-dimensional code positioning method with variable step length. Background technique [0002] In recent years, with the rise of mobile payment and the demand for product traceability, two-dimensional code (Quick Response Code, referred to as QR code) has begun to widely enter people's lives, and it has the advantages of low cost, large information capacity and strong fault tolerance. The QR code is considered to be the most important bridge connecting online and offline at present, and the foundation of the bridge is the decoding technology. [0003] In the application process, the current decoding technology has problems such as long decoding time and low decoding success rate. This makes its application problematic in some fields. For example, highways use QR codes to collect tolls. Due to the long decoding time, it will lead to vehicle co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K7/14
CPCG06K7/1443G06K7/1417
Inventor 方俊彬陈哲黎华平梁富念方俊键
Owner SUNLUX IOT TECH GUANGDONG