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Distorted QR code image correction method

A QR code and image technology, applied in the field of image processing, can solve problems affecting the effect of twisting

Active Publication Date: 2008-04-23
FUJIAN RONGJI SOFTWARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even if the positioning deviation of the specified non-existing point is small, it will greatly affect the effect of twisting

Method used

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  • Distorted QR code image correction method
  • Distorted QR code image correction method
  • Distorted QR code image correction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0060] The following is an accurate correction of an actual QR code picture, the original picture is as follows Figure 8 shown.

[0061] 1. Rotation detection of QR code image symbol area:

[0062] 1) Connect three known vertices to get a triangle;

[0063] 2), seek the side with the longest side length of this triangle, and its relative triangle vertex is the vertex corresponding to the upper left corner of the normal QR code symbol area, set as P 1 ;

[0064] 3), with the vertex P 1 As the center, observe the other two vertices of the triangle counterclockwise, the first vertex encountered is the vertex corresponding to the lower left corner of the normal QR code symbol area, set P 2 . The other vertex is the vertex corresponding to the upper right corner of the normal QR code symbol area, set to P 4 .

[0065] In this way, we get the corresponding positions of the three known vertices in the normal QR code symbol area, namely P 1 The vertex corresponding to the upp...

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Abstract

This invention relates to deformation QR code image correction method, which comprises the following steps: a testing image rotation type through deformation QR codes image three known top points; b, using remote double tangent method to get the normal QR codes image right angle top; converting the reverse transparent view to correct the QR code image. This method only needs designed QR codes character area three top points to realize image accurate positioning.

Description

technical field [0001] The invention relates to an image processing method of a two-dimensional barcode, in particular to a method for twisting a distorted image of a QR code, and belongs to the technical field of image processing. Background technique [0002] QR code, also known as quick response code, is a quick response matrix code for automatic identification and data collection specified in the national standard GB / T 18284-2000. Such as figure 1 As shown, the QR code is a rectangular array symbol composed of a series of dark and light-colored modules, which is divided into two parts: functional graphics and coding areas. Among them, the functional graphics include: position detection graphics, also known as image-finding graphics, which are three identical square symbols located at the upper left corner, upper right corner and lower left corner of the matrix symbol, and the module sequence of each position detection graphic is composed of a deep Color-light color-dar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K9/32
Inventor 马华东明安龙万孝雄胡自强
Owner FUJIAN RONGJI SOFTWARE