CN107577980B - A kind of Quick Response Code error-correcting decoding method and its code translator - Google Patents
A kind of Quick Response Code error-correcting decoding method and its code translator Download PDFInfo
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- CN107577980B CN107577980B CN201710919166.7A CN201710919166A CN107577980B CN 107577980 B CN107577980 B CN 107577980B CN 201710919166 A CN201710919166 A CN 201710919166A CN 107577980 B CN107577980 B CN 107577980B
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Abstract
This application discloses a kind of Quick Response Code error-correcting decoding methods, include the following steps：Obtain image in 2 D code；Quick Response Code code word is extracted from image in 2 D code；Identification icon is obtained from Quick Response Code code word；Judge whether correctly identify Quick Response Code code word according to identification icon；The Quick Response Code code word is identified if it can correctly identify；Otherwise identification icon is utilized to calculate the position of correcting pattern；Correcting pattern is identified according to the position of correcting pattern；Quick Response Code is corrected using identification icon and correcting pattern, obtains identifiable Quick Response Code code word, and identifies the Quick Response Code code word.The application uses the identification icon and correcting pattern distinguished with the prior art, so that positioning when decoding is more accurate, it is readily identified go out pattern in 2 D code inclination and breakage, simultaneously according to the damaged degree of pattern in 2 D code, stage chooses recognition methods, with the increase of damaged degree so that processing step is incremented by, treatment effeciency and treatment effect have been taken into account.
Description
Technical field
This application involves decoding field more particularly to a kind of Quick Response Code error-correcting decoding methods and its code translator.
Background technology
With the high speed development of Internet of Things, the article networked everywhere using Internet of Things in actual life, these
Article is typically that appended Quick Response Code networks thereon by scanning, realizes Item Information acquisition, the anti-fake functions such as trace to the source.
But due to the Quick Response Code being attached on article be frequently present of it is damaged, fold, deformation the problems such as, many Quick Response Codes without
Method correctly identifies, to which the networking to Internet of Things is made troubles.
Invention content
The application's is designed to provide a kind of Quick Response Code error-correcting decoding method and decoding system, for realizing Quick Response Code
Error correction in decoding.
In order to achieve the above objectives, Quick Response Code error-correcting decoding method provided herein adopts the following technical scheme that：
A kind of Quick Response Code error-correcting decoding method, includes the following steps：
Obtain image in 2 D code；
Quick Response Code code word is extracted from image in 2 D code；
Identification icon is obtained from Quick Response Code code word；
Judge whether correctly identify Quick Response Code code word according to identification icon；
The Quick Response Code code word is identified if it can correctly identify；
Otherwise identification icon is utilized to calculate the position of correcting pattern；
Identify correcting pattern；
Quick Response Code is corrected using identification icon and correcting pattern, obtains identifiable Quick Response Code code word, and identify
The Quick Response Code code word.
Wherein identification icon is the rectangle that center is sky.
Wherein Quick Response Code code word includes three identification icons, and the rectangle major radius of three identification icons differs.
Wherein further include coding pattern in Quick Response Code code word, coding pattern is solid black square.
It includes following sub-step wherein to utilize identification icon to calculate the position of correcting pattern：
It determines and is located at cornerwise two identification icons of Quick Response Code code word；
Identify the inner boundary of two identification icons；
Inner boundary is extended into intersection, two intersection points is obtained, is denoted as intersection point one and intersection point two
Exclude the intersection point one near third identification icon；
Quick Response Code code word is searched for from intersection point twos, obtains the position of correcting pattern.
Wherein if Quick Response Code code word cannot be identified correctly, before the position for calculating correcting pattern using identification icon also
Include the following steps：
Delete the supplemental code in Quick Response Code code word.
The supplemental code wherein deleted in Quick Response Code code word further includes later following steps：
Judge whether the wrong code word in Quick Response Code code word is more than the error correcting capability of the Quick Response Code code word；
If it is greater than then exiting the Quick Response Code error-correcting decoding method；
If wherein judging that the wrong code word in Quick Response Code code word is not more than the error correcting capability of the Quick Response Code code word, further include
Following steps：
Associated polynomial Sj is acquired using code word；
Error location polynomial is acquired using associated polynomial Sj；
The root that error location polynomial is solved using preceding search, is obtained errors present number, determines errors present；
Error value is acquired by errors present, to obtain wrong patterns；
The deletion error pattern from Quick Response Code code word obtains the correct pattern of Quick Response Code.
A kind of Quick Response Code error correcting/decoding apparatus, including processor is also claimed in the application, executes two dimension as described above
Code error-correcting decoding method.
Further, a kind of computer media is also claimed in the application, includes computer program, the computer journey thereon
When sort run, method as described above is executed.
There is advantageous effect as described below using the application of method and apparatus as above：
1, due to the position calculating method using the identification icon and correcting pattern distinguished with the prior art, so that
Positioning when decoding is more accurate, it is readily identified go out pattern in 2 D code inclination and breakage, and improve computational efficiency；
2, according to the damaged degree of pattern in 2 D code, stage chooses recognition methods, includes the correcting pattern of first stage,
The filling correcting pattern of second stage and the deletion filler code of phase III, three phases represent pattern in 2 D code difference
Processing mode when damaged degree, with the increase of damaged degree so that processing step be incremented by, that is, taken into account treatment effeciency and
Treatment effect.
Description of the drawings
Fig. 1 is the structure chart of Quick Response Code in the prior art；
Fig. 2 is the method flow diagram of the application Quick Response Code error correction recognition methods；
Fig. 3 is the application two-dimension code structure schematic diagram；
Fig. 4 is the method flow step of the embodiment of the present application 2；
Fig. 5 is the application identification icon inner boundary extending line intersection point schematic diagram.
Specific implementation mode
Below in conjunction with the attached drawing in the embodiment of the present application, technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based on this hair
Embodiment in bright, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall in the protection scope of this application.
Existing Quick Response Code is as shown in Figure 1, include image in 2 D code 110, wherein image in 2 D code 110 includes multiple identifications
Pattern 120 and coding pattern 130, plurality of identification icon 120 are used to determine the size and location of Quick Response Code.Existing skill
In art, in order to preferably carry out error correction to Quick Response Code, increase multiple error correction position codes in 130 part of coding pattern, but it is multiple
The introducing of error correction position code is so that the recognition time of Quick Response Code is obviously prolonged, while also having been squeezed entrained in existing coding pattern
The quantity of information content, therefore propose the application.
The application is changed by the shape to identification icon, from the of the same size as shown in Figure 1 of the prior art
Square identification icon is the rectangle of sky centered on variation, so that positioning when decoding is more accurate, particularly due to making
With rectangular arrangement, it can recognize with ease that out that pattern in 2 D code tilts, further, according to the damaged degree of pattern in 2 D code,
It decides whether to further calculate correcting pattern, if pattern in 2 D code can be identified smoothly, without introducing correcting pattern,
Otherwise by identifying that correcting pattern combines the identification icon being obtained ahead of time to identify that Quick Response Code, the location information of wherein correcting pattern obtain
, it is to be calculated by the ingenious shape for defining identification icon, without being obtained by scanning the two-dimensional code pattern, it is clear that carry
High decoding efficiency, meanwhile, even if in the case of correcting pattern breakage by identification icon if can obtain correcting pattern
Position further increases decoding accuracy rate to simulate the information of correcting pattern.Meanwhile the application is when also having taken into account decoding
Data volume problem, i.e., before the error correction delete filling code word so that error correction data amount is remarkably decreased.
Embodiment 1
The error-correcting decoding method of the application is as shown in Fig. 2, include the following steps：
Step S210, image in 2 D code is obtained；
Image in 2 D code can be obtained by way of scanning, wherein the image in 2 D code of the application is as shown in Figure 3.
Step S220, Quick Response Code code word is extracted from image in 2 D code；
Extract Quick Response Code code word from the image in 2 D code that obtains of scanning, wherein the Quick Response Code code word obtained as shown in figure 3,
Including identification icon 310,320,330, coding pattern 350 and correcting pattern 340.
Step S230, identification icon is obtained from Quick Response Code code word；
Coding pattern 350 is represented using solid black square in type of two-dimension codeword, hollow rectangle represents identification icon, from two
It ties up and obtains the pattern with hollow rectangle structure in code word, and combine the location information of the hollow square type structure, such as positioned at two
The outside for tieing up code code word, identifies identification icon 310,320,330.Wherein Quick Response Code code word include three identification icons 310,
320,330, and the rectangle major radius (radius shown in 360 is rectangle major radius in Fig. 3) of these identification icons differs.Make
With three identification icons so as to which Quick Response Code is accurately positioned, since the rectangle major radius 360 of identification icon is different, thus can also
The location information that identification icon is determined according to the difference of radius, to obtain identification icon.
Step S240, judge whether correctly identify Quick Response Code code word according to identification icon；
According to identification icon, judges whether correctly identify Quick Response Code code word, use existing Quick Response Code identification side
Judgment method in method can be realized.
Step S250, the Quick Response Code code word is identified if it can correctly identify；
If can correctly identify, existing two-dimensional code identification method is used, identifies Quick Response Code code word.
Step S260, identification icon is otherwise utilized to calculate the position of correcting pattern；
If cannot correctly identify, the position that correcting pattern is calculated using the identification icon obtained, packet are just needed
Include sub-step as shown in Figure 4：
Step S410, it determines and is located at cornerwise two identification icons of Quick Response Code code word；
As shown in Fig. 2, positioned at being 320 and 330 for cornerwise two identification icons, that is, it is located at pattern in 2 D code upper right
The identification icon of the identification icon and the pattern in 2 D code lower left corner at angle.Due to the use of three identification icons, so being located at diagonal line
Identification icon be two patterns that can be uniquely determined.
Step S420, inner boundary of the identification positioned at cornerwise two identification icons of Quick Response Code code word；
The wherein inner boundary of identification icon as shown in 360,370,380,390 in Fig. 3 is obtained in step S410
Positioned at the inner boundary of cornerwise two identification icons of Quick Response Code code word, wherein 360 and 370 be the inner boundary of identification icon 330,
380 and 390 be the inner boundary of identification icon 320.
Step S430, inner boundary is extended into intersection, obtains two intersection points, is denoted as intersection point one and intersection point two；
Above-mentioned inner boundary 360,370,380,390 is extended, two intersection points are obtained, as shown in figure 5, intersection point 510 and intersection point
520。
Step S440, the intersection point one near third identification icon is excluded；
In Fig. 5, the identification icon positioned at the Quick Response Code upper left corner is third identification icon, that is, it is diagonal to be located at Quick Response Code code word
Identification icon except two identification icons of line, intersection point 520 therein are intersection points one, since intersection point one is apparently not correction chart
Position where case, it is possible to directly exclude the intersection point.
Step S450, Quick Response Code code word is searched for from intersection point twos, obtains the location information of correcting pattern.
Intersection point two, i.e. intersection point 510 in Fig. 5 are located near correcting pattern, and from intersection point 510s, search can be obtained school
Positive pattern.Correcting pattern is determined due to the use of the form of identification icon intersection point, therefore even if in the case where correcting pattern damages,
Such as missing or image in 2 D code fold, it is also possible to obtain the position of correcting pattern.
It, can be by filling school automatically in the case where correcting pattern position can not be obtained by search in another embodiment
The mode of positive pattern, and obtain complete pattern in 2 D code.Scheduled multiple correcting patterns can have been pre-saved in interpretation method,
The version information of Quick Response Code to be identified is can determine according to identification icon or Quick Response Code code word, thus from the correcting pattern set of reservation
In be taken at the correcting pattern that the pattern in 2 D code matches, due to obtaining the position of correcting pattern by identification icon
It sets, only the correcting pattern of acquisition need to be filled into corresponding position, to obtain complete pattern in 2 D code.
Step S270, correcting pattern is identified according to the position of correcting pattern；
Pass through existing recognition methods, you can realize the identification to correcting pattern.
Step S280, Quick Response Code is corrected using identification icon and correcting pattern, obtains identifiable Quick Response Code code
Word, and identify the Quick Response Code code word.
Likewise, passing through existing bearing calibration and recognition methods, you can realize step S280.
Embodiment 2
On the basis of the scheme of embodiment 1, following examples 2, embodiment 2 and the key step in embodiment 1 are proposed
Identical, Quick Response Code code word cannot correctly identified by only increasing, and before the position that correcting pattern is calculated using identification icon, be increased
Add following steps, to further increase the efficiency of identification Quick Response Code, saves recognition time.
Wherein if step S240 judgements cannot correctly identify Quick Response Code code word, correcting pattern is being calculated using identification icon
Position before further include following steps：
Step P1, the supplemental code in Quick Response Code code word is deleted；
In Quick Response Code coding, includes often the supplemental code for filling up two-dimentional code space in coding pattern 350, use benefit
Code is filled to supplement in the region of blank in coding pattern completely, but supplemental code does not have practical significance, simultaneously to its identification and decoding
Significant information cannot be obtained, therefore, before calculating correcting pattern, these nothings are deleted in order to reduce the treating capacity of data
Doubt information, so as to greatly shorten subsequent error correction flow.
After step P1 deletes the supplemental code in Quick Response Code code word, step S260 can be directly executed, under also can perform
Step P2 is stated, is further ensured that the efficiency and correctness of identification.
Step P2, judge whether the wrong number of codewords in Quick Response Code code word is more than the error correcting capability of the Quick Response Code code word；
Including following sub-step：
Step P21, the Quick Response Code code word after deletion supplemental code is read, obtain Quick Response Code version number and refused
The number of the Quick Response Code code word of read error；
Wherein Quick Response Code version number information is embedded into identification icon or Quick Response Code code word.Calculate the Quick Response Code that refusal is read
The number of code word.
Step P22, the corresponding error correction threshold value of this version number is obtained；
The wherein correspondence table of the error correction threshold value and version number is generated in advance, and is stored in the identification device for executing decoded operation
In.Wherein error correction threshold value identifies the error correcting capability of Quick Response Code code word.
Step P3, if it is greater than then exiting the Quick Response Code error-correcting decoding method；
If whether wrong number of codewords is more than the error correcting capability of the Quick Response Code code word, i.e., wrong number of codewords be more than this two
The error correction threshold value of code code word is tieed up, this indicates that the code word of mistake far beyond existing recognition capability, at this moment exits the decoding
Method.
Step P4, otherwise associated polynomial Sj is acquired using code word；
Step P5, error location polynomial is acquired using associated polynomial Sj；
Step P6, the root that error location polynomial is solved using preceding search, is obtained errors present number, determines errors present；
Step P7, error value is acquired by errors present, to obtain wrong patterns；
Step P8, the deletion error pattern from Quick Response Code code word obtains the correct pattern of Quick Response Code.
Above-mentioned steps P4-P8 is the general error correction method of existing Quick Response Code, such as existing RS correcting data errors algorithm.
In example 2, after having executed one of above-mentioned steps, certain a few or whole, step S260 is continued to execute.
Embodiment 3
Wherein disclosed herein as well is a kind of Quick Response Code error correcting/decoding apparatus, including processor, above-mentioned implementation can be realized
Error-correcting decoding method in example 2 and embodiment 3.
Embodiment 4
The application also protects a kind of computer storage media, includes computer program thereon, when which runs,
Execute the method as described in embodiment 1 or 2.
Description and application of the invention herein are illustrative, is not wishing to limit the scope of the invention to above-described embodiment
In.The deformation and change of embodiments disclosed herein are possible, real for those skilled in the art
The replacement and equivalent various parts for applying example are well known.It should be appreciated by the person skilled in the art that not departing from the present invention
Spirit or essential characteristics in the case of, the present invention can in other forms, structure, arrangement, ratio, and with other components,
Material and component are realized.Without departing from the scope and spirit of the present invention, can to embodiments disclosed herein into
The other deformations of row and change.
Claims (7)
1. a kind of Quick Response Code error-correcting decoding method, which is characterized in that include the following steps：
Obtain image in 2 D code；
Quick Response Code code word is extracted from image in 2 D code；
Identification icon is obtained from Quick Response Code code word；
Judge whether correctly identify Quick Response Code code word according to identification icon；
The Quick Response Code code word is identified if it can correctly identify；
Otherwise identification icon is utilized to calculate the position of correcting pattern；
Correcting pattern is identified according to the position of correcting pattern；
Quick Response Code is corrected using identification icon and correcting pattern, obtains identifiable Quick Response Code code word, and identify this two
Tie up code code word；
Wherein identification icon is the rectangle that center is sky；
It includes following sub-step wherein to utilize identification icon to calculate the position of correcting pattern：
It determines and is located at cornerwise two identification icons of Quick Response Code code word；
Identify the inner boundary of two identification icons；
Inner boundary is extended into intersection, two intersection points is obtained, is denoted as intersection point one and intersection point two；
Exclude the intersection point one near third identification icon；
Quick Response Code code word is searched for from intersection point twos, obtains the position of correcting pattern；
Scheduled multiple correcting patterns have been pre-saved in interpretation method, and to be identified two are determined according to identification icon or type of two-dimension codeword
The version information for tieing up code will to the acquisition from scheduled multiple correcting patterns and the matched correcting pattern of the pattern in 2 D code
Correcting pattern fills into the position of correcting pattern；
Wherein Quick Response Code code word includes three identification icons, and the rectangle major radius of three identification icons differs.
2. Quick Response Code error-correcting decoding method as described in claim 1 further includes coding pattern wherein in Quick Response Code code word, coding
Pattern is solid black square.
3. Quick Response Code error-correcting decoding method as described in claim 1, wherein if Quick Response Code code word cannot be correctly identified, in profit
The position that correcting pattern is calculated with identification icon further includes before following steps：
Delete the supplemental code in Quick Response Code code word.
4. Quick Response Code error-correcting decoding method as claimed in claim 3, wherein after deleting the supplemental code in Quick Response Code code word also
Include the following steps：
Judge whether the wrong code word in Quick Response Code code word is more than the error correcting capability of the Quick Response Code code word；
If it is greater than then exiting the Quick Response Code error-correcting decoding method.
5. Quick Response Code error-correcting decoding method as claimed in claim 4, if wherein judging the wrong code word in Quick Response Code code word
Further include following steps no more than the error correcting capability of the Quick Response Code code word：
Associated polynomial S is acquired using code wordj；
Error location polynomial is acquired using associated polynomial Sj；
The root that error location polynomial is solved using preceding search, is obtained errors present number, determines errors present；
Error value is acquired by errors present, to obtain wrong patterns；
The deletion error pattern from Quick Response Code code word obtains the correct pattern of Quick Response Code.
6. a kind of Quick Response Code error correcting/decoding apparatus, including processor execute the two-dimentional code error-correcting decoding as described in claim 1-5
Method, wherein identification icon are that center is that empty rectangle is utilizing identification icon meter if Quick Response Code code word cannot be identified correctly
The supplemental code in Quick Response Code code word is also deleted before calculating the position of correcting pattern.
7. a kind of computer readable storage medium includes computer program thereon, when which runs, such as right is executed
It is required that the method described in 1-5, wherein identification icon are the rectangles that center is sky, if Quick Response Code code word cannot be identified correctly,
The supplemental code in Quick Response Code code word is also deleted before calculating the position of correcting pattern using identification icon.
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| CN110020571B (en) * | 2019-03-18 | 2022-05-13 | 创新先进技术有限公司 | Two-dimensional code correction method, device and equipment |
| CN110705329B (en) * | 2019-09-30 | 2021-09-14 | 联想(北京)有限公司 | Processing method and device and electronic equipment |
| CN113496132B (en) * | 2020-04-07 | 2024-04-12 | 深圳爱根斯通科技有限公司 | Two-dimensional code identification method and device, electronic equipment and storage medium |
| CN113822091B (en) * | 2021-11-23 | 2022-03-15 | 北京紫光青藤微系统有限公司 | Method and device for correcting errors of two-dimensional code pattern, electronic equipment and storage medium |
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| CN105046184A (en) * | 2015-07-22 | 2015-11-11 | 福建新大陆自动识别技术有限公司 | Distortion image correction based two-dimensional code decoding method and system |
| CN106326802A (en) * | 2016-08-19 | 2017-01-11 | 腾讯科技（深圳）有限公司 | Two-dimensional code correction method and device and terminal device |
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| US7175090B2 (en) * | 2004-08-30 | 2007-02-13 | Cognex Technology And Investment Corporation | Methods and apparatus for reading bar code identifications |
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| CN105046184A (en) * | 2015-07-22 | 2015-11-11 | 福建新大陆自动识别技术有限公司 | Distortion image correction based two-dimensional code decoding method and system |
| CN106326802A (en) * | 2016-08-19 | 2017-01-11 | 腾讯科技（深圳）有限公司 | Two-dimensional code correction method and device and terminal device |
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