Image correction method suitable for bending deformation two-dimensional code

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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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-dimensional codes, which is suitable for bending deformation caused by the deviation of the shooting angle and the existence of the two-dimensional code itself on the curved surface question

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