CN101882201A - Barcode decoding chip and method - Google Patents
Barcode decoding chip and method Download PDFInfo
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- CN101882201A CN101882201A CN2010101887936A CN201010188793A CN101882201A CN 101882201 A CN101882201 A CN 101882201A CN 2010101887936 A CN2010101887936 A CN 2010101887936A CN 201010188793 A CN201010188793 A CN 201010188793A CN 101882201 A CN101882201 A CN 101882201A
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Abstract
The invention discloses a barcode decoding chip and a barcode decoding method. The barcode decoding chip comprises a PDF417 barcode edge judgment module which is used for scanning barcode image and judging if the barcode edge has a PDF417 barcode edge; a PDF417 identification module which is used for performing PDF417 barcode identification of a barcode image when the PDF417 barcode edge judgment module determines the barcode image has the PDF417 barcode edge; an RSS barcode characteristic judgment module which is used for extracting bar null value and judging if the barcode image has the searching characteristic of an RSS barcode when the PDF417 barcode edge judgment module determines the barcode image has no PDF417 barcode edge; and an RSS identification module which is used for performing RSS barcode identification of the barcode image when the RSS barcode characteristic judgment module determines the barcode image has the searching characteristic of the RSS barcode. The barcode decoding chip of the invention can realize the identification of various barcode and has the advantages of convenient use, high decoding speed and low cost.
Description
[technical field]
The present invention relates to a kind of decoding chip and method, particularly a kind of bar code decoding chip and the method that can discern multiple bar code.
[background technology]
Barcode technology is an emerging technology that integrates coding, printing, identification, data acquisition and processing (DAP) that grows up on computer technology and infotech basis.Barcode technology is because its identification is quick, accurate, reliable and low cost and other advantages, be widely used in fields such as commerce, taking care of books, storage, post and telecommunications, traffic and Industry Control, and certainly will in " Internet of Things " that rise gradually used, bring into play great function.
The bar code that is widely used at present comprises bar code and two-dimensional bar code.Bar code claims linear bar code again, is made up of a plurality of " bars " that are arranged in parallel and " sky " unit, and bar code information is expressed by bar and empty different in width and position.Bar code is not then expressed any information just in a direction (generally being horizontal direction) expressing information in vertical direction, so information capacity and space availability ratio are lower, and promptly can't discern after bar code is damaged.
Two-dimensional bar code is made up of the chequered with black and white particular geometric figure that distributes on two-dimensional directional according to certain rules, its can be on two-dimensional directional expressing information, so information capacity and space availability ratio are higher, and have certain verifying function.Two-dimensional bar code can be divided into stack two-dimensional bar code and matrix two-dimensional barcode.The stack two-dimensional bar code is that the bar code by the multirow cutting back piles up and forms, and representational stack two-dimensional bar code comprises PDF417, Code 49, Code 16K etc.
As a rule, existing decoding chip all is to decode at a kind of bar code, such as one-dimensional barcode decoding chip, RSS bar code decoding chip, PDF417 bar code decoding chip etc.And these three kinds of bar codes are very commonly used, need sometimes these three kinds of bar codes are decoded, and then need to use in turn three kinds of decoding chips, and convenient inadequately, decoding speed is slow, and the cost height.
Therefore, at the above deficiency that prior art exists, needing badly provides a kind of identification that can realize multiple bar code, and decoding chip and method easy to use, that decoding speed is faster, cost is lower.
[summary of the invention]
In order to overcome the above problems, the invention provides a kind of identification that can realize multiple bar code, and bar code decoding chip and method easy to use, that decoding speed is faster, cost is lower.
The invention discloses a kind of bar code decoding chip, comprising: be used for bar code image is scanned and judges whether bar code image exists the PDF417 bar code border judge module of PDF417 bar code border; Be used for when PDF417 bar code border judge module is judged bar code image and had the PDF417 bar code border, bar code image being carried out the PDF417 identification module of PDF417 bar-code identification; Be used for when PDF417 bar code border judge module is judged bar code image and do not had the PDF417 bar code border, bar code image being carried out the bar null value and extract, and judge whether bar code image exists the RSS bar code feature judge module of the search characteristics of RSS bar code; Be used for when RSS bar code feature judge module is judged bar code image and had the search characteristics of RSS bar code, bar code image being carried out the RSS identification module of RSS bar-code identification.
According to one preferred embodiment of the present invention, the RSS identification module comprises: be used for the RSS bar code image processing module that the barcode fragment to bar code image makes up; Be used to judge whether barcode fragment combination meets the RSS bar code judge module of RSS bar code rule of combination; Be used for RSS bar code decoding module that the barcode fragment combination that meets RSS bar code rule of combination is discerned.
According to one preferred embodiment of the present invention, further comprise the counter that is connected with RSS bar code decoding module in the RSS identification module, be used to write down the number of times of RSS bar code decoding module recognition failures, when the count value no show preset value of counter, the counter controls RSS bar code image processing module barcode fragment of bar code image again makes up, the count value of counter reaches preset value, then judges recognition failures, and with the count value zero clearing.
According to one preferred embodiment of the present invention, PDF417 bar code border judge module comprises:
Scan module is used for bar code image is scanned and judges whether bar code image exists a plurality of empty borders;
Counter, be connected with scan module, be used for the scanning times of writing scan module, and gated sweep module conversion direction of scanning or obtain new bar code image and scan, when the counter controls scan module obtains new bar code image and scans, the number of times zero clearing of the record in the counter;
At least two border judging units are used for utilizing respectively different border judgment rules to come the border that walks abreast, a plurality of empty borders that scan is judged.
According to one preferred embodiment of the present invention, the quantity of border judging unit is four, respectively corresponding 81111113 border judgment rules, 31111118 border judgment rules, 71111113 border judgment rules and 31111117 border judgment rules.
According to one preferred embodiment of the present invention, bar code decoding chip further comprises the bar code identification module, is used for when RSS bar code feature judge module judges that bar code image does not exist the search characteristics of RSS bar code or RSS identification module recognition failures bar code image being carried out bar code identification.
According to one preferred embodiment of the present invention, the bar code identification module is judged barcode types by the bar null value that RSS bar code feature judge module extracts, and discerns according to barcode types.
According to one preferred embodiment of the present invention, comprise the recognition logic of the bar code that a plurality of correspondences are dissimilar in the bar code identification module, to the bar code image identification that walks abreast.
According to one preferred embodiment of the present invention, when RSS bar code feature judge module extracts the bar null value to bar code image, repeatedly extract the bar null value of bar code image, and add up the occurrence number of each bar empty position discal patch null value, select the maximum bar null value of occurrence number of each bar empty position, form one group of bar null value.
According to one preferred embodiment of the present invention, bar code decoding chip comprises that further output module is used to export the output module of codeword information or decoding failure information.
The present invention further discloses a kind of bar code decoding method, this method comprises: a. scans bar code image, and judges whether bar code image exists the PDF417 bar code border; B. if there is the PDF417 bar code border in bar code image, then bar code image is carried out the PDF417 bar-code identification; C. if there is not the PDF417 bar code border in bar code image, then bar code image is carried out the bar null value and extract, and judge whether to exist the search characteristics of RSS bar code; D. if there is the search characteristics of RSS bar code in bar code image, then bar code image is carried out the RSS bar-code identification.
According to one preferred embodiment of the present invention, in step a, the PDF417 bar code border that comes a plurality of empty borders are walked abreast with the judgment rule on four kinds of borders of PDF417 bar code is judged respectively.
According to one preferred embodiment of the present invention, in step c, repeatedly extract the bar null value of bar code image, and add up the occurrence number of each bar empty position discal patch null value, select the maximum bar null value of occurrence number of each bar empty position, form one group of bar null value.
According to one preferred embodiment of the present invention, the step of this bar code decoding method further comprises: e. carries out bar code identification to unidentified successful bar code image in the bar code image of the search characteristics that does not have the RSS bar code judged among the step c or the steps d.
Characteristics of the present invention are that this bar code decoding chip and method can realize the identification to multiple bar code, and easy to use, decoding speed is faster, cost is lower.
[description of drawings]
Fig. 1 is that the circuit of the bar code decoding chip in one embodiment of the invention connects block diagram.
Fig. 2 is that the circuit of the PDF417 bar code border judge module among the embodiment of Fig. 1 connects block diagram.
Fig. 3 is a kind of synoptic diagram of RSS bar code.
Fig. 4 is the array configuration of the search characteristics in a kind of RSS bar-code structure.
Fig. 5 is the process flow diagram of the bar code decoding method in one embodiment of the invention.
[embodiment]
The present invention is described in detail below in conjunction with drawings and Examples.
As shown in Figure 1, in the present embodiment, bar code decoding chip comprises PDF417 bar code border judge module 02, PDF417 identification module 03, RSS bar code feature judge module 04, RSS bar-code identification module 06, bar code identification module 05 and output module 07.
As shown in Figure 2, PDF417 bar code border judge module 02 has comprised scan module 21, connects scan module 21 and its scanning times is 22, four borders of counter judging unit 23-26 of statistics.After bar code decoding chip obtained bar code image 01, scan module 21 scanned it after getting access to bar code image 01, and judges whether this bar code image 01 exists a plurality of empty borders.Two different preset values can be set in the counter 22, when reaching first preset value, counter 22 can gated sweep module 21 change the direction of scanning, and when reaching second preset value, counter 22 gated sweep modules 21 are removed to obtain new bar code image and are scanned, and with the number of times zero clearing of the record in the counter 22.Scan module 21 scans and judges bar code image 01 and has a plurality of empty borders, then directly a plurality of empty flank pass is transported to border judging unit 23-26 and is carried out the border judgement.When scan module 21 is judged bar code image 01 and is had a plurality of empty borders, a plurality of empty flank pass are passed to four border judging unit 23-26, the border that walks abreast is judged.Border judging unit 23-26 is corresponding 81111113 border judgment rules, 31111118 border judgment rules, 71111113 border judgment rules and 31111117 border judgment rules respectively.In other embodiments, the border that also can use at least two border judging units to come bar code image 01 is walked abreast is judged.
If PDF417 bar code border judge module 02 is judged bar code image 01 and had the PDF417 bar code border, then discern by 03 pair of bar code image 01 of PDF417 identification module.If discern successfully, then codeword information is transferred to output module 07, by output module 07 codeword information is exported.If recognition failures, then the information transmission with recognition failures arrives output module 07, by the information output of output module 07 with decoding failure.
If PDF417 bar code border judge module 02 is judged bar code image 01 and do not had the PDF417 bar code border, then carry out the bar null value and extract by 04 pair of bar code image of RSS bar code feature judge module 01.In one embodiment of the present invention, bar null value to bar code image 01 is repeatedly extracted, and adds up the occurrence number of each bar empty position discal patch null value, selects the maximum bar null value of occurrence number of each bar empty position, form one group of bar null value, to improve the accuracy of the bar null value that is obtained.
After RSS bar code feature judge module 04 extracts the shaping null value, continue to judge the search characteristics that whether has the RSS bar code in this group bar null value that extracts.As shown in Figure 3, the RSS bar-code structure comprises the fragment that left side sign indicating number speech+search characteristics (Finder)+right side sign indicating number speech is formed.A RSS bar code can comprise maximum 11 fragments, and the search characteristics in each fragment (Finder) has nothing in common with each other.According to ISO IEC24724-2006 international standard, the search characteristics in the RSS bar-code structure (Finder) can comprise array configuration as shown in Figure 4.For example, when RSS bar code bar code comprised 2 fragments, the fragment combination mode that its coding rule allows was: A1 search characteristics+A2 search characteristics.
If RSS bar code feature judge module 04 judges that there is the search characteristics of RSS bar code in bar code image 01, then discerns by 06 pair of bar code image information of RSS bar-code identification module.RSS bar-code identification module 06 comprises RSS bar code image processing module 61, RSS bar code judge module 62 and RSS bar code decoding module 63.The bar code segment of 61 pairs of bar code images 01 of RSS bar code image processing module makes up, judge by RSS bar code judge module 62 whether the barcode fragment combination that RSS bar code image processing module 61 is combined into meets RSS bar code rule of combination then, if meet, then the barcode fragment combination that meets RSS bar code rule of combination by 63 pairs of RSS bar code decoding modules is discerned, if do not meet, then change by bar code identification module 05 and discern.After RSS bar code decoding module 63 identifies codeword information, can be transferred to output module 07, by output module 07 output codeword information.Behind RSS bar code decoding module 63 recognition failures, bar code image 01 information transmission can be discerned to bar code identification module 05.In one embodiment of the present invention, further comprise the counter (not shown) that is connected with RSS bar code decoding module 63 in the RSS bar-code identification module 06, be used to write down the number of times of RSS bar code decoding module 63 recognition failures.And, a preset value is arranged, when the frequency of failure does not reach preset value in counter, counter controls RSS bar code image processing module 61 makes up the barcode fragment of bar code image 01 again, when the frequency of failure reaches preset value, judge recognition failures, and with the number of times zero clearing of writing down.
If RSS bar code feature judge module 04 judges that there is not the search characteristics of RSS bar code in bar code image 01, perhaps RSS bar-code identification module 06 is unidentified goes out codeword information, then bar code image 01 information transmission is carried out bar code identification to bar code identification module 05.Bar code identification module 05 can be judged barcode types according to the bar null value, and to according to barcode types bar code image 01 being discerned.Perhaps, comprise the recognition logic of the bar code that a plurality of correspondences are dissimilar in the bar code identification module 05, to bar code image 01 identification that walks abreast of input.If bar code identification module 05 is discerned successfully, then codeword information is transferred to output module 07, codeword information is exported, if bar code identification module 05 recognition failures by output module 07, then the recognition failures information transmission is arrived output module 07, by output module 07 output recognition failures information.
As shown in Figure 5, in the bar code decoding method of one embodiment of the invention, at first bar code image is scanned, and judge whether there is the PDF417 bar code border in the bar code image.After image scanning, can judge whether bar code image has a plurality of empty borders earlier.Do not have a plurality of empty borders when judging bar code image, then obtain new bar code image and scan.When judging bar code image and have a plurality of empty borders, according to four kinds of boundary characteristics of PDF417 the PDF417 bar code border is carried out on the empty border of bar and judge.Carrying out the PDF417 bar code border when judging, the PDF417 bar code border that can be respectively comes described a plurality of empty borders are walked abreast with the judgment rule on four kinds of borders of PDF417 bar code is judged, with raising judgement speed.If there is the PDF417 bar code border in bar code image, then bar code image is carried out the PDF417 bar-code identification.Identify codeword information, then export codeword information, unidentifiedly go out codeword information, then export decoding failure information.
When judging that there is not the PDF417 bar code border in bar code image, then bar code image is carried out the bar null value and extract, and judge whether to exist the search characteristics of RSS bar code.When carrying out the extraction of bar null value, can repeatedly extract the bar null value of bar code image, and add up the occurrence number of each bar empty position discal patch null value, select the maximum bar null value of occurrence number of each bar empty position, form one group of bar null value, to improve the accuracy of bar null value.Then, judge whether that group bar null value that extracts exists the search characteristics of RSS bar code.If there is the search characteristics of RSS bar code in bar code image, then bar code image is carried out the RSS bar-code identification.When carrying out the RSS bar-code identification, can handle bar code image earlier, form the combination of bar code segment, judge then whether it meets RSS bar code rule of combination, when judging that the bar code combination meets RSS bar code rule of combination, can add up it, discern again when reaching the certain predetermined value.Discern successfully, then export codeword information, recognition failures then carries out bar code identification to bar code image.
If there is not the search characteristics of RSS bar code in bar code image, or the failure of RSS bar-code identification, for example judge when the bar code combination does not meet RSS bar code rule of combination or can not discern codeword information, can carry out bar code identification to bar code image.When carrying out bar code identification, can determine the bar code type according to the bar null value earlier, according to the bar code type bar code picture is discerned then; Also can use the recognition logic of the dissimilar bar code of a plurality of correspondences, to the bar code image identification that walks abreast.Discern successfully, then export codeword information, recognition failures is then exported decoding failure information.
Bar code decoding chip of the present invention and method can realize the identification to bar code, RSS bar code and PDF417 bar code, and easy to use, decoding speed is faster, cost is lower.
In the above-described embodiments, only the present invention has been carried out exemplary description, but those skilled in the art can carry out various modifications to the present invention after reading present patent application under the situation that does not break away from the spirit and scope of the present invention.
Claims (14)
1. bar code decoding chip, it is characterized in that: described bar code decoding chip comprises:
PDF417 bar code border judge module is used for bar code image is scanned and judges whether described bar code image exists the PDF417 bar code border;
The PDF417 identification module is used for when described PDF417 bar code border judge module is judged described bar code image and had the PDF417 bar code border described bar code image being carried out the PDF417 bar-code identification;
RSS bar code feature judge module, be used for when described PDF417 bar code border judge module is judged described bar code image and do not had the PDF417 bar code border, described bar code image being carried out the bar null value and extract, and judge whether described bar code image exists the search characteristics of RSS bar code;
The RSS identification module is used for when described RSS bar code feature judge module is judged described bar code image and had the search characteristics of RSS bar code described bar code image being carried out the RSS bar-code identification.
2. bar code decoding chip as claimed in claim 1 is characterized in that: described RSS identification module comprises:
RSS bar code image processing module is used for the barcode fragment of described bar code image is made up;
RSS bar code judge module is used to judge whether barcode fragment combination meets RSS bar code rule of combination;
RSS bar code decoding module is used for the barcode fragment combination that meets RSS bar code rule of combination is discerned.
3. bar code decoding chip as claimed in claim 2, it is characterized in that: further comprise the counter that is connected with described RSS bar code decoding module in the described RSS identification module, be used to write down the number of times of described RSS bar code decoding module recognition failures, when the count value no show preset value of described counter, the described RSS bar code image of the described counter controls processing module barcode fragment of described bar code image again makes up, the count value of described counter reaches preset value, then judge recognition failures, and with the count value zero clearing.
4. bar code decoding chip as claimed in claim 1 is characterized in that: described PDF417 bar code border judge module comprises:
Scan module is used for bar code image is scanned and judges whether described bar code image exists a plurality of empty borders;
Counter, be connected with described scan module, be used to write down the scanning times of described scan module, and control described scan module conversion direction of scanning or obtain new bar code image and scan, when the described scan module of described counter controls obtains new bar code image and scans, the number of times zero clearing of the record in the counter;
At least two border judging units are used for utilizing respectively different border judgment rules to come the border that walks abreast, a plurality of empty borders that scan is judged.
5. bar code decoding chip as claimed in claim 4, it is characterized in that: the quantity of described border judging unit is four, respectively corresponding 81111113 border judgment rules, 31111118 border judgment rules, 71111113 border judgment rules and 31111117 border judgment rules.
6. bar code decoding chip as claimed in claim 1, it is characterized in that: described bar code decoding chip further comprises the bar code identification module, is used for when described RSS bar code feature judge module judges that bar code image does not exist the search characteristics of RSS bar code or described RSS identification module recognition failures described bar code image being carried out bar code identification.
7. bar code decoding chip as claimed in claim 6 is characterized in that: described bar code identification module is judged barcode types by described the null value that described RSS bar code feature judge module extracts, and discerns according to described barcode types.
8. bar code decoding chip as claimed in claim 6 is characterized in that: comprise the recognition logic of the bar code that a plurality of correspondences are dissimilar in the described bar code identification module, to the identification that walks abreast of described bar code image.
9. bar code decoding chip as claimed in claim 1, it is characterized in that: when described RSS bar code feature judge module extracts the bar null value to described bar code image, repeatedly extract the bar null value of described bar code image, and add up the occurrence number of each bar empty position discal patch null value, select the maximum bar null value of occurrence number of described each bar empty position, form one group of bar null value.
10. as the described any described bar code decoding chip of claim of claim 1-9, it is characterized in that: described bar code decoding chip further comprises the output module that is used to export codeword information or decoding failure information.
11. a bar code decoding method is characterized in that: described method comprises:
A. bar code image is scanned, and judge whether described bar code image exists the PDF417 bar code border;
B. if there is the PDF417 bar code border in described bar code image, then described bar code image is carried out the PDF417 bar-code identification;
C. if there is not the PDF417 bar code border in described bar code image, then described bar code image is carried out the bar null value and extract, and judge whether to exist the search characteristics of RSS bar code;
D. if there is the search characteristics of RSS bar code in described bar code image, then described bar code image is carried out the RSS bar-code identification.
12. bar code decoding method as claimed in claim 11 is characterized in that: in step a, the PDF417 bar code border that comes described a plurality of empty borders are walked abreast with the judgment rule on four kinds of borders of PDF417 bar code is judged respectively.
13. bar code decoding method as claimed in claim 11, it is characterized in that: in step c, repeatedly extract the bar null value of described bar code image, and add up the occurrence number of each bar empty position discal patch null value, select the maximum bar null value of occurrence number of described each bar empty position, form one group of bar null value.
14. bar code decoding method as claimed in claim 11 is characterized in that: the step of described bar code decoding method further comprises:
E. unidentified successful bar code image in the bar code image of the search characteristics that does not have the RSS bar code judged among the step c or the steps d is carried out bar code identification.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101887936A CN101882201B (en) | 2010-06-01 | 2010-06-01 | Barcode decoding chip and method |
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| CN2010101887936A CN101882201B (en) | 2010-06-01 | 2010-06-01 | Barcode decoding chip and method |
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| CN102521558A (en) * | 2011-11-18 | 2012-06-27 | 深圳市宝捷信科技有限公司 | Bar code identifying method and device |
| CN106446751A (en) * | 2016-10-11 | 2017-02-22 | 福建中金在线信息科技有限公司 | Bar code recognition method and apparatus |
| CN109241806A (en) * | 2018-08-10 | 2019-01-18 | 北京龙贝世纪科技股份有限公司 | A kind of multi-code recognition methods and identifying system simultaneously |
| CN111241857A (en) * | 2020-01-21 | 2020-06-05 | 广州尚臣电子有限公司 | Method based on conversion scanning between one-dimensional code and two-dimensional code |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102521558A (en) * | 2011-11-18 | 2012-06-27 | 深圳市宝捷信科技有限公司 | Bar code identifying method and device |
| CN102521558B (en) * | 2011-11-18 | 2014-04-02 | 深圳市宝捷信科技有限公司 | Bar code identifying method and device |
| CN106446751A (en) * | 2016-10-11 | 2017-02-22 | 福建中金在线信息科技有限公司 | Bar code recognition method and apparatus |
| CN109241806A (en) * | 2018-08-10 | 2019-01-18 | 北京龙贝世纪科技股份有限公司 | A kind of multi-code recognition methods and identifying system simultaneously |
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|---|---|
| CN101882201B (en) | 2012-06-27 |
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