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Edge detection and positioning identification method for annular code

A positioning recognition and edge detection technology, applied in the field of two-dimensional codes, can solve problems such as wrong data areas and decoding failures, and achieve the effects of enhanced positioning accuracy, anti-interference and strong deformation capabilities

Inactive Publication Date: 2020-05-26
徐波
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention proposes a ring code edge detection and positioning recognition method, which solves the problem in the prior art that if the two-dimensional code is polluted, it is easy to get the wrong data area based on the ratio to find the locator, resulting in the failure of decoding

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  • Edge detection and positioning identification method for annular code
  • Edge detection and positioning identification method for annular code
  • Edge detection and positioning identification method for annular code

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Embodiment Construction

[0038] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0039] figure 1 The structure diagram of each area of ​​the ring code is shown, in which the black dot of each ring represents the code 1, and the white area represents the code 0, and the functions of the other modules are: the decoration area is only for ring code decoration and can be used to transmit product information; the positioning area It is used to determine the position of the ring code, as well as the initial encoding position and encoding direction; t...

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Abstract

The invention discloses an edge detection and positioning identification method for an annular code, belongs to the field of two-dimensional codes, and specifically comprises the following steps: obtaining a to-be-detected image; preprocessing the to-be-detected image, determining the center coordinate and radius of the annular code through a quadrant iteration center algorithm, selecting the maximum circumscribed circle of the annular code and the circumscribed rectangle of the annular code in a framing manner, and intercepting a ring code image from the to-be-detected image according to thecircumscribed rectangle; preprocessing the annular code image, screening the identification locator through a preferred algorithm, and correcting through a perspective transformation algorithm. The shape is set for the annular code, the shape with the black-to-white ratio is abandoned to serve as the locator, the anti-interference and deformation capacity is high, and the locating accuracy of thering code is enhanced.

Description

technical field [0001] The invention relates to the technical field of two-dimensional codes, in particular to an edge detection and positioning recognition method of a ring code. Background technique [0002] Traditional square QR codes are usually embedded with double-layer squares in the three corners as the positioning area, and its black and white ratio is 1:1:3:1:1. Using the isotropic equivalence of the rectangle, it is easy to locate the two-dimensional in the real scene At the same time, according to the square edge, the coding area of ​​the data code can be framed, and then the black and white blocks of the data area can be extracted according to the specific position and order to achieve the purpose of decoding. Utilizing this anisotropic invariance, it can resist the interference of the two-dimensional code recognition caused by the rotation and scaling of the scene during shooting, but once the positioning area is polluted, such as the outer rectangular frame is...

Claims

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Application Information

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IPC IPC(8): G06K7/14
CPCG06K7/1417G06K7/1443G06K7/1452
Inventor 徐波
Owner 徐波
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