CN106845314A - A kind of method for rapidly positioning of Quick Response Code - Google Patents
A kind of method for rapidly positioning of Quick Response Code Download PDFInfo
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- CN106845314A CN106845314A CN201611232321.XA CN201611232321A CN106845314A CN 106845314 A CN106845314 A CN 106845314A CN 201611232321 A CN201611232321 A CN 201611232321A CN 106845314 A CN106845314 A CN 106845314A
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- response code
- spacing
- code
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- 230000004044 response Effects 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims abstract description 6
- 238000001914 filtration Methods 0.000 claims abstract description 6
- 238000000605 extraction Methods 0.000 claims description 2
- 239000006002 Pepper Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000013507 mapping Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
- G06K7/1404—Methods for optical code recognition
- G06K7/1439—Methods for optical code recognition including a method step for retrieval of the optical code
- G06K7/1443—Methods for optical code recognition including a method step for retrieval of the optical code locating of the code in an image
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
- G06K7/1404—Methods for optical code recognition
- G06K7/1408—Methods for optical code recognition the method being specifically adapted for the type of code
- G06K7/1417—2D bar codes
Abstract
The present invention proposes a kind of method for rapidly positioning of Quick Response Code, comprises the following steps：S1, obtains pending image in 2 D code；S2, gray level image is converted to by the image in 2 D code that step S1 is obtained；S3, medium filtering；S4, rim detection；S5, parallel coordinates positioning；Wherein, the step S5 specifically includes following steps：S51, the edge image that step S4 gets is mapped on parallel coordinates；S52, the edge image that step S4 is got is rotated along Y-axis, and postrotational edge image is mapped on parallel coordinates；S53, comparison step S51 obtain image on each intersection point spacing and step S52 obtain image on each intersection point spacing, the coordinate corresponding to the equal point of spacing describe Quick Response Code jointly where region.A kind of method for rapidly positioning of Quick Response Code that the present invention is provided, under complex background, is quickly positioned to Quick Response Code region.
Description
Technical field
The present invention relates to Quick Response Code field, and in particular to a kind of method for rapidly positioning of Quick Response Code.
Background technology
Quick Response Code be with certain specific geometric figure according to certain rules in plane i.e. two-dimensional directional be distributed it is black
White alternate graphic recording data symbol information；Dexterously using constituting computer-internal logical foundations on coding
" 0 ", the concept of " 1 " bit stream, the geometrical body corresponding with binary system using several represents word numerical information, passes through
Image input device or photoelectric scanning device automatically identifying and reading are automatically processed with realizing information：It has barcode technology some be total to
Property：Every kind of code system has its specific character set；Each character occupies certain width；With certain verifying function etc..Simultaneously
Also there is the information automatic identification function and the treatment rotationally-varying point of figure to not going together.Quick Response Code is a kind of image identification skill
Art, because having the advantages of memory capacity is big, and storage information species is more, error correcting capability is strong, in article code, the neck such as mobile payment
Domain is widely used.
Quick Response Code has a wide range of application, therefore its applied environment is relative complex.The picture for getting, often has the back of the body of complexity
Scape, in decoding process, need to navigate to the specific region of Quick Response Code from picture.Common method disappears in Quick Response Code positioning stage
Time-consuming is long.
The content of the invention
In order to solve the above problems, the invention provides a kind of method for rapidly positioning of Quick Response Code.The one of present invention offer
The method for rapidly positioning of Quick Response Code is planted, under complex background, Quick Response Code region is quickly positioned.
The technical solution adopted by the present invention is as follows：
A kind of method for rapidly positioning of Quick Response Code, comprises the following steps：
S1, obtains pending image in 2 D code；
S2, gray level image is converted to by the image in 2 D code that step S1 is obtained；
S3, medium filtering；
S4, rim detection；
S5, parallel coordinates positioning；
Wherein, the step S5 specifically includes following steps：
S51, the edge image that step S4 gets is mapped on parallel coordinates；
S52, the edge image that step S4 is got rotates along Y-axis, and postrotational edge image is mapped to parallel
On coordinate；
On the image that the spacing and step S52 of each intersection point on image that S53, comparison step S51 are obtained are obtained
The spacing of each intersection point, the coordinate corresponding to the equal point of spacing describe Quick Response Code jointly where region.
A kind of method for rapidly positioning of above-mentioned Quick Response Code, wherein, the step S4 specifically includes use " Canny " operator
Extract the edge of image.
A kind of method for rapidly positioning of above-mentioned Quick Response Code, wherein, the step S2 is specifically included：The figure that step S1 is obtained
Picture, the red, green, blue component of each pixel in coloured image is represented with R, G, B respectively, the corresponding picture of gray level image after conversion
The brightness value of vegetarian refreshments is I, then：
I=0.3*R+0.59*G+0.11*B.
The present invention provide the beneficial effects of the present invention are：Examined by carrying out gradation conversion, medium filtering, edge to image
After survey, the edge line of image is obtained, whether edge line is determined whether to being converted to for parallel coordinates using cartesian coordinate
Correctly.Its is simple to operate, is not related to complicated calculations, and by Mathematical Modeling, lifts precision.Under complex background, to Quick Response Code
Region is quickly positioned, applied widely.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
Other accompanying drawings are obtained with according to these accompanying drawings.
Fig. 1 is a kind of flow chart of the method for rapidly positioning of Quick Response Code of the invention；
Fig. 2 be a kind of Quick Response Code of the invention method for rapidly positioning in an image in 2 D code example；
Fig. 3 be a kind of Quick Response Code of the invention method for rapidly positioning in edge line example corresponding with Fig. 2；
Fig. 4 is that cartesian coordinate point (0,2) and (2,0) in a kind of method for rapidly positioning of Quick Response Code of the invention is mapped to
The schematic diagram of parallel coordinates.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment
As shown in figure 1, a kind of method for rapidly positioning of Quick Response Code, comprises the following steps：
S1, obtains pending image in 2 D code；Equipment obtains the coloured image of thecamera head.
S2, gray level image is converted to by the image in 2 D code that step S1 is obtained；Gray level image is that image brightness values are arrived 0
255 image.The image that step S1 is obtained, the red, green, blue component of each pixel in coloured image is represented with R, G, B respectively,
The brightness value of the corresponding pixel of gray level image after changing is I, then：I=0.3*R+0.59*G+0.11*B.
S3, medium filtering；Because camera and transmitting procedure can factor be influenceed by electric current is unstable etc., image can go out
Existing other bright spot, i.e. salt-pepper noise.In order to eliminate the influence of salt-pepper noise, it is necessary to carry out medium filtering to image.Intermediate value is filtered
Ripple is a kind of nonlinear filter.In the window of definition, it is ranked up by the pixel value size of image, takes the number in centre position
As the result that wave filter is exported.
S4, rim detection；Use the edge of " Canny " operator extraction image.Side by after rim detection, obtaining image
Edge, edge is made up of line.It is exactly some parallel lines, as shown in Figure 2 and Figure 3 after Quick Response Code rim detection.
S5, parallel coordinates positioning；
Wherein, the step S5 specifically includes following steps：
S51, the edge image that step S4 gets is mapped on parallel coordinates；According to parallel coordinates principle, by two dimension
Code is considered as the image in cartesian coordinate, then the straight line of cartesian coordinate is mapped as the point of parallel coordinates, but can only be to negative
Slope straight line maps.Cartesian coordinate point (0,2) and (2,0) is mapped to parallel coordinates, as shown in Figure 4.
S52, the edge image that step S4 is got rotates along Y-axis, and postrotational edge image is mapped to parallel
On coordinate；Because parallel coordinates can only detect the straight line of negative slope, this step rotates edge image along y-axis, re-maps flat
On row coordinate, the straight line of positive slope in original image can be now detected.
On the image that the spacing and step S52 of each intersection point on image that S53, comparison step S51 are obtained are obtained
The spacing of each intersection point, the coordinate corresponding to the equal point of spacing describe Quick Response Code jointly where region.In two images,
The equal point of spacing is exactly Quick Response Code region.The straight line of negative slope in image is detected in step S51, is examined in step S52
Measure the straight line of image positive slope.In addition, the spacing of each parallel lines is equal, therefore, the image after mapping two width is compared,
The equal point of spacing is exactly the intersecting region of two groups of parallel lines, you can orientate Quick Response Code region as.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (3)
1. a kind of method for rapidly positioning of Quick Response Code, it is characterised in that comprise the following steps：
S1, obtains pending image in 2 D code；
S2, gray level image is converted to by the image in 2 D code that step S1 is obtained；
S3, medium filtering；
S4, rim detection；
S5, parallel coordinates positioning；
Wherein, the step S5 specifically includes following steps：
S51, the edge image that step S4 gets is mapped on parallel coordinates；
S52, the edge image that step S4 is got is rotated along Y-axis, and postrotational edge image is mapped into parallel coordinates
On；
S53, comparison step S51 obtain image on each intersection point spacing and step S52 obtain image on each
The spacing of intersection point, the coordinate corresponding to the equal point of spacing describe Quick Response Code jointly where region.
2. the method for rapidly positioning of a kind of Quick Response Code according to claim 1, it is characterised in that the step S4 is specifically wrapped
Include the edge of use " Canny " operator extraction image.
3. a kind of method for rapidly positioning of Quick Response Code according to claim 1 and 2, it is characterised in that the step S2 tools
Body includes：The image that step S1 is obtained, the red, green, blue component of each pixel in coloured image is represented with R, G, B respectively, is turned
The brightness value of the corresponding pixel of gray level image after changing is I, then：I=0.3*R+0.59*G+0.11*B.
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| CN201611232321.XA CN106845314B (en) | 2016-12-28 | 2016-12-28 | A kind of method for rapidly positioning of two dimensional code |
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| CN201611232321.XA CN106845314B (en) | 2016-12-28 | 2016-12-28 | A kind of method for rapidly positioning of two dimensional code |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108985129A (en) * | 2018-08-02 | 2018-12-11 | 谷东科技（广州）有限公司 | The positioning of two dimensional code and method for detecting |
| CN106845314B (en) * | 2016-12-28 | 2019-07-12 | 广州智慧城市发展研究院 | A kind of method for rapidly positioning of two dimensional code |
| CN110348265A (en) * | 2019-07-19 | 2019-10-18 | 福建工程学院 | A kind of novel matrix code restoring method based on parallel coordinate system |
| CN111178111A (en) * | 2019-12-31 | 2020-05-19 | 航天信息股份有限公司 | Two-dimensional code detection method, electronic device, storage medium and system |
| CN116776909A (en) * | 2023-08-28 | 2023-09-19 | 四川星点网络技术有限公司 | Bottle lid two-dimensional code system of tracing to source |
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| US20040114707A1 (en) * | 2002-09-23 | 2004-06-17 | Herbert Bruder | Method of creating images in computed tomography (CT), and CT device |
| CN102074051A (en) * | 2011-01-13 | 2011-05-25 | 深圳市蓝韵实业有限公司 | Fast locating method for data bonding volume of volume rendering parallel projection |
| CN103354928A (en) * | 2012-02-03 | 2013-10-16 | 日本电气株式会社 | Device, method, and program for visualization of multi-dimensional data |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106845314B (en) * | 2016-12-28 | 2019-07-12 | 广州智慧城市发展研究院 | A kind of method for rapidly positioning of two dimensional code |
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2016
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| US20040114707A1 (en) * | 2002-09-23 | 2004-06-17 | Herbert Bruder | Method of creating images in computed tomography (CT), and CT device |
| CN102074051A (en) * | 2011-01-13 | 2011-05-25 | 深圳市蓝韵实业有限公司 | Fast locating method for data bonding volume of volume rendering parallel projection |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106845314B (en) * | 2016-12-28 | 2019-07-12 | 广州智慧城市发展研究院 | A kind of method for rapidly positioning of two dimensional code |
| CN108985129A (en) * | 2018-08-02 | 2018-12-11 | 谷东科技（广州）有限公司 | The positioning of two dimensional code and method for detecting |
| CN108985129B (en) * | 2018-08-02 | 2021-11-23 | 谷东科技有限公司 | Two-dimensional code positioning and detecting method |
| CN110348265A (en) * | 2019-07-19 | 2019-10-18 | 福建工程学院 | A kind of novel matrix code restoring method based on parallel coordinate system |
| CN110348265B (en) * | 2019-07-19 | 2022-04-05 | 福建工程学院 | Novel matrix code restoration method based on parallel coordinate system |
| CN111178111A (en) * | 2019-12-31 | 2020-05-19 | 航天信息股份有限公司 | Two-dimensional code detection method, electronic device, storage medium and system |
| CN116776909A (en) * | 2023-08-28 | 2023-09-19 | 四川星点网络技术有限公司 | Bottle lid two-dimensional code system of tracing to source |
| CN116776909B (en) * | 2023-08-28 | 2023-11-03 | 四川星点网络技术有限公司 | Bottle lid two-dimensional code system of tracing to source |
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| CN106845314B (en) | 2019-07-12 |
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Effective date of registration: 20231117 Address after: 6 / F, block a, 88 Tiangui Road, Huadu District, Guangzhou, Guangdong 510800 Patentee after: DEVELOPMENT Research Institute OF GUANGZHOU SMART CITY Patentee after: GUANGZHOU BOCHUANG INFORMATION TECHNOLOGY CO.,LTD. Address before: 6 / F, block a, 88 Tiangui Road, Huadu District, Guangzhou, Guangdong 510800 Patentee before: DEVELOPMENT Research Institute OF GUANGZHOU SMART CITY Patentee before: GUANGZHOU BOCHUANG INFORMATION TECHNOLOGY CO.,LTD. Patentee before: Guangzhou Zhongke Integrated Circuit Design Co.,Ltd. |