Image correction method suitable for bending deformation two-dimensional code

A two-dimensional code and deformation technology, applied in the field of image processing, to achieve the effect of accurate positioning

Active Publication Date: 2018-02-09
广东国玉科技股份有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to solve the above-mentioned defects in the prior art, and to provide an image correction method suitable for bending and deforming two-dime

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  • Image correction method suitable for bending deformation two-dimensional code
  • Image correction method suitable for bending deformation two-dimensional code
  • Image correction method suitable for bending deformation two-dimensional code

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[0048] The image correction method suitable for bending and deforming two-dimensional codes disclosed in the embodiments of the present invention can be divided into two steps: two-dimensional code region extraction and bending deformation correction. Two-dimensional code extraction and bending deformation correction each include three small steps. There are six small steps in total. as attached Figure 8As shown, the two-dimensional code area extraction step includes two-dimensional code image preprocessing, two-dimensional code position detection graphic positioning and two-dimensional code closure extraction. Two-dimensional code image preprocessing is to obtain a binary image that is easier to process without destroying the two-dimensional code information. The steps include: graying the two-dimensional code RGB format image by weighted Noise, Otsu binarization. The location of the two-dimensional code position detection pattern is firstly determined according to the bla...

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Abstract

The invention discloses an image correction method suitable for a bending deformation two-dimensional code, and specially aims at the problem of two-dimensional code nonlinear deformation because of the photographing angle and the bending surface. The method is mainly divided into two steps of a two-dimensional code area extraction and bending deformation correction. The step of two-dimensional code area extraction comprises two-dimensional code image preprocessing, two-dimensional code position detection pattern positioning and two-dimensional code closed extraction. The step of bending deformation correction comprises original image reference corresponding point extraction, standard image reference corresponding point extraction and construction of a bending deformation correction transformation model. The two-dimensional code corner point detection method is improved by using the slope and intercept knowledge of plane geometry to realize accurate positioning of the two-dimensional code corner points, a "roller" method is designed to solve the edge points of the bending deformation two-dimensional code, and the side length relationship of the two-dimensional code and the positiondetection pattern is calculated through combination of curve fitting to construct the transformation model so that adaptive correction of the bending deformation two-dimensional code under the general condition can be realized.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to an image correction method suitable for bending and deforming two-dimensional codes. Background technique [0002] In the industrial environment of the manufacturing industry and modern logistics links, some important information with commodities and goods is compressed into two-dimensional codes through encryption algorithms and then printed on the outer packaging of commodities and goods. The two-dimensional code can extract the information in it and realize the fast and intelligent classification of commodities and goods according to the information, so as to improve the management efficiency. [0003] However, traditional recognition algorithms cannot quickly and accurately identify QR codes with geometric deformations, especially the curved shape of some commodities and goods themselves causes the bending deformation of the QR codes on the surface. Contents of the...

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Application Information

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IPC IPC(8): G06K7/14G06T7/187G06T7/70
CPCG06K7/1417G06K7/1452G06K7/146G06T7/187G06T7/70
Inventor 吴玉香冼颖宪
Owner 广东国玉科技股份有限公司
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