Damaged two-dimensional code recognition method based on computational holography

A recognition method and computational holographic technology, applied in the direction of electromagnetic radiation induction, etc., can solve the problems of two-dimensional codes that are easily damaged, cannot be scanned and recognized, and are polluted, and achieve the effect of high feasibility and fast coding

Inactive Publication Date: 2018-01-30
HENAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a method for identifying damaged two-dimensional codes based on computational holography, which has the ability to reproduce fragments, and solves the problem that the current two-dimensional codes are easily damaged, polluted, etc., and cannot be scanned and recognized

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  • Damaged two-dimensional code recognition method based on computational holography
  • Damaged two-dimensional code recognition method based on computational holography
  • Damaged two-dimensional code recognition method based on computational holography

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Embodiment

[0045] The present invention will be further described below in conjunction with the accompanying drawings. figure 1 It is an ordinary two-dimensional code generated by a computer. In the scheme of the present invention, the figure 1 coded as a hologram figure 2 , attach this hologram next to the normal QR code. When the normal QR code is damaged or contaminated, or both the normal QR code and the holographic QR code are damaged, by scanning the hologram on one side figure 2 , to get the complete QR code information.

[0046] Specific steps are as follows:

[0047] (1) Production and printing:

[0048] (1) Read the standard two-dimensional code by the method of picture reading, and carry out digital conversion to it, obtain the digital image of the standard two-dimensional code;

[0049] (2) Discrete Fourier transform is carried out to the digital image of standard two-dimensional code, obtains its spectral information;

[0050] (3) Construct the corresponding reference ...

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Abstract

The invention provides a damaged two-dimensional code recognition method based on computational holography, and relates to the technical field of information storing and reproducing by using a grayscale hologram. The method comprises the steps that a computer is used to carry out hologram encoding on a generated two-dimensional code to convert the two-dimensional code into the grayscale hologram;the grayscale hologram is printed on one side of the two-dimensional code; when the original two-dimensional code is damaged, the grayscale hologram is used to assist recognition; when the two-dimensional code is damaged, a scanner with the decoding capability is used to scan the grayscale hologram on one side of the two-dimensional code; and the grayscale hologram containing the information of the two-dimensional code is decoded to acquire the information contained in the original two-dimensional code. The method provided by the invention has the advantages that a series of processes such asfast encoding and decoding are realized based on the current hardware level of computers and mobile phones; in view of the disadvantage that a damaged or dirty two-dimensional code is hard to be recognized in the prior art, the method combines the internationally widely used two-dimensional code and a computational holography technology; and even if the two-dimensional code is partially damaged, the product information can be read.

Description

technical field [0001] The invention relates to the technical field of using gray scale holograms to store and reproduce information, in particular to a method for identifying damaged two-dimensional codes based on computational holography. Background technique [0002] Holography was first discovered by British physicist Denise Gabor in 1947. The emergence of laser in 1960 provided a high-coherence light source, which made it possible for the further development of holographic technology. Since then, optical holography has developed rapidly. Nowadays, the development of optical holography is in its heyday, and with the rapid improvement of digital computers and computing technology, people widely use computers to simulate, calculate, process various optical processes and control computer graphics. Stimulated by these two different factors, a computational holography technology based on digital computing and modern optics was developed in the middle and late 20th century. S...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/10
Inventor 李贺贺马东方陈梦茹李晓飏马连辉
Owner HENAN UNIV OF SCI & TECH
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