A method and system for quickly eliminating false detection of QR code position detection graphics

Abstract

The present invention provides a method and system for quickly eliminating false detection of a QR code position detection pattern. The method includes: dividing a first sampling area above the upper edge of the position detection pattern, and dividing a second sampling area below its lower edge; The third sampling area is divided to the left of its left edge, and the fourth sampling area is divided to the right of its right edge; the chromaticity value of each pixel in each sampling area is collected, and then statistics belonging to the same chromaticity value are collected. The number of pixels, taking the chromaticity value as the abscissa and the number of pixels as the ordinate to obtain 4 histograms; filter and derive the 4 histograms respectively, and determine whether there are two histograms showing a single peak characteristic If it exists, it is a correct detection; otherwise, it is a false detection. It can simply and quickly judge whether the located position detection pattern is correct, and in addition, it has the advantages of less consumption of computing resources and high accuracy of the judgment result.

Description

technical field [0001] The invention belongs to the technical field of two-dimensional code image processing, and in particular relates to a method and system for rapidly eliminating false detection of QR code position detection patterns. Background technique [0002] QR (Quick Response, Quick Response) code is a kind of two-dimensional barcode. It was invented by Denso-Wave Company in Japan in 1994. Compared with other two-dimensional barcodes, it has the advantages of fast reading speed, high data density and small footprint. Advantages, widely used in identity verification, security anti-counterfeiting, e-commerce and many other fields. [0003] Such as figure 1 As shown, it is a schematic structural diagram of a QR code, which is a square array composed of multiple black square units and multiple white square units, mainly including two parts, the coding area and the functional area, wherein the functional area includes position detection graphics and positioning graphi...

AI Technical Summary

Problems solved by technology

Therefore, accurately locating the position detection pattern belongs to the basic step of QR code decoding, which directly affects the decoding speed and decoding accuracy of QR code, etc.

[0004] In the prior art, since the images of other areas in the QR code image have a certain similarity with the position detection pattern, there is a situation of misdetection of the position detection pattern, which leads to the inability to correctly decode the QR code in the subsequent process

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