Predistortion two-dimensional code generation method for cylindrical surface 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 pasting a two-dimensional code on a cylindrical surface. Background technique [0002] At present, with the increasing maturity of two-dimensional code encoding and decoding technology, two-dimensional codes are widely used in daily life. Media advertisements, anti-counterfeiting labels, business card social networking, ticket management and electronic payment and other fields all use two-dimensional codes to spread information. carrier to connect online and offline. [0003] In earlier technologies, the printing and placement of two-dimensional codes were limited, and it was necessary to print the two-dimensional code on a flat or nearly flat printed matter, or display it on a flat terminal display screen, in order to make the two-dimensional code The reading device can successfully dec...

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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

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