A pre-distorted two-dimensional code generation method for cylindrical two-dimensional code stickers

Abstract

The present invention provides a predistortion two-dimensional code generation method for cylindrical surface two-dimensional code stickers. A planar two-dimensional code image is subjected to predistortion processing to obtain a corresponding predistortion two-dimensional image, the predistortion two-dimensional image can be printed to a two-dimensional code sticker attached on an object cylindrical surface or directly printed on the object cylindrical surface, a two-dimensional code reading device is employed near a preset shooting pitch angle [Theta] to directly shoot the two-dimensional code sticker, and the predistortion two-dimensional code can offset the perspective distortion of shooting the cylindrical surface to allow the two-dimensional images obtained through direct shooting by the two-dimensional code reading device to be similar to the effect of shooting the planar two-dimensional code image so as to allow a general two-dimensional code reading device to conveniently, rapidly and effectively decode the two-dimensional codes on the surface of a cylindrical surface object and solve the problem that planar two-dimensional codes directly pasted or printed on a cylinder cannot be identified or are low in identification rate.

Description

technical field [0001] The invention relates to the technical field of two-dimensional code identification, in particular to a method for generating a pre-distorted two-dimensional code for cylindrical surface two-dimensional code stickers. Background technique [0002] At present, with the increasing maturity of QR code encoding and decoding technology, the application of QR code in daily life is becoming more and more extensive. The carrier to connect online and offline. [0003] In earlier technologies, the printing and placement of two-dimensional codes were subject to certain restrictions, and the two-dimensional code needed to be printed on a flat or nearly flat printed product, or displayed on a flat terminal display screen, in order to make the two-dimensional code The reading device can successfully decode and recognize it; during recognition, the plane QR code image collected by the QR code reading device through the camera usually has tilt distortion due to the p...

AI Technical Summary

Problems solved by technology

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a pre-distorted two-dimensional code generation method for cylindrical surface two-dimensional code stickers, which is used to pre-distort the plane two-dimensional code to obtain the ability to offset the cylindrical surface Shoot the pre-distorted QR code with perspective distortion, and use it as a two-dimensional code sticker on the cylindrical surface, so that after it is pasted or printed on the cylindrical surface, the two-dimensional code image obtained by directly shooting it through the two-dimensional code reading device converges The effect of shooting plane two-dimensional code images, so that the general two-dimensional code reading equipment can also conveniently, quickly and efficiently decode and recognize the two-dimensional code on the surface of the cylindrical object, to solve the direct problem of the two-dimensional code sticking The problem that the attachment or printing on the cylinder cannot be recognized or the recognition rate is low

Images