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Method for generating a visual two-dimensional code

A technology of two-dimensional codes and two-dimensional code pictures, applied in the field of image processing, can solve problems affecting image quality, obvious image noise, etc., and achieve the effect of improving details, output image quality, and similarity

Active Publication Date: 2019-11-08
SHANGHAI JIAOTONG UNIV
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0007] The present invention generates a halftone two-dimensional code on the basis of the generated halftone image in view of the prior art, ignoring the influence of the two-dimensional code on the original halftone image, making the two-dimensional code color block become image noise, affecting image quality and other shortcomings , a method for generating a visual two-dimensional code is proposed, using the DBS (direct binary search) method to embed a halftone image, which solves the problem of obvious noise in the generated image in the original method, and produces a Similar "visual QR code"

Method used

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  • Method for generating a visual two-dimensional code
  • Method for generating a visual two-dimensional code
  • Method for generating a visual two-dimensional code

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Experimental program
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Embodiment 1

[0030] Such as figure 1 As shown, this embodiment includes the following steps:

[0031] The first step is to encode the civilization information with a two-dimensional code, obtain the corresponding two-dimensional code color block distribution matrix (this matrix corresponds to the image of this two-dimensional code), and subdivide each color block into k×k pixels , generally take k=3 to achieve better results.

[0032] The second step is to preprocess the image, turn it into a grayscale image and resize it to match the size of the subdivided QR code. The processing result and the original image are as follows image 3 shown.

[0033] The third step is to generate a filter whose weight is Gaussian distribution according to the Gaussian smoothing feature of the visual model of the human eye. The specific steps are as follows:

[0034] This embodiment applies a 3×3 Gaussian matrix, such as figure 1As shown, in the following formula, I is the gray value matrix of the gray ...

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Abstract

Disclosed is a method for generating a visualized two-dimensional code. Through integrating of generation of a halftone image into change of surrounding points of the two-dimensional code, the halftone image is generated on the basis of a known two-dimensional code, such that two-dimensional code pixels become a composition part of the image itself rather than noise points, and thus the quality of the generated image is greatly improved.

Description

technical field [0001] The present invention relates to a technology in the field of image processing, specifically a halftone image that generates a target image and merges it with a two-dimensional code, so that the two-dimensional code carries image information and simplifies the operation of arranging the two-dimensional code. That is, the method of "visual code". Background technique [0002] With the popularity of smart phones and the rapid development of the Internet and multimedia communications, the frequency of QR codes in daily life has greatly increased. In practical applications, when QR codes appear on web pages, posters and other promotional materials, they often affect the aesthetics of the screen due to their abrupt machine code form. When adding QR codes, they can only be placed in corners, etc. Attention, but this affects the effect of publicity. At the same time, because the two-dimensional code itself does not have any meaning only from the image, usef...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00G06T9/00
Inventor 戴领付豪方晓鑫夏立盛斌
Owner SHANGHAI JIAOTONG UNIV