CN106203216A - A kind of high-performance bar code decoding method - Google Patents
A kind of high-performance bar code decoding method Download PDFInfo
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- CN106203216A CN106203216A CN201610530247.3A CN201610530247A CN106203216A CN 106203216 A CN106203216 A CN 106203216A CN 201610530247 A CN201610530247 A CN 201610530247A CN 106203216 A CN106203216 A CN 106203216A
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- scan line
- bar code
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- code
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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
- G06K7/1408—Methods for optical code recognition the method being specifically adapted for the type of code
Abstract
The present invention relates to a kind of high-performance bar code decoding method, by first judging barcode types, determine scanning, decoding parametric according to barcode types, then use scanning, identify, while combination, scanned the method step i.e. decoded；Compared with prior art, method provided by the present invention can successfully manage in practical situation any one scan line the most not can completely scan the empty image of all bars of this bar code image cannot the problem of successfully decoded, improve decoding rate.Meanwhile, this high-performance bar code decoding method also has high-performance, also has, for noisy image, the decoding capability that energy is strong.
Description
Technical field
The invention belongs to Bar Code field, be specifically related to a kind of high-performance bar code decoding method.
Background technology
Bar Code is the emerging technology grown up on information technology and Fundamentals of Computer Technology, due to
It identifies quickly, accurate, reliable and low cost and other advantages, is widely used in every field；Bar code is by arranged in parallel multiple
" bar " and " empty " unit forms, and the information of bar code is expressed by the different in width combination that bar is empty；Processing in Barcode Recognizing System can be divided into
Line scanning and Surface scan.Line run-down obtains the image of a scan line, and Surface scan once obtains several scan lines；In reality
In application, due to various situations such as abrasion, print defect, light interference, the bar code image actually got can be caused to deposit
At various disturbed conditions.The most any one scan line the most not can completely scans all bars sky of this bar code image, thus
Cause the situation of None-identified.
Chinese patent literature (application number: 201010188937.8) discloses bar code image scanning method, this invention
In search out and bar code progressively scanned behind the direction of bar code, border, decode line by line；But any one scan line all can not
The image that the complete all bars scanning this bar code image are empty just cannot successfully decoded.
Chinese patent literature (application number: 201010188937.8) discloses bar code image scanning method, Ke Yiyou
There is situation about being stained to bar code image in practical situation in effect, improves decoding rate；But it is only from the angle of image
Distinguishing insult area and without insult area, its Rule of judgment may lose efficacy under given conditions, and not explanation
How can combine without insult area.
For above-mentioned technical problem, therefore need to improve.
Summary of the invention
The present invention be in order to overcome above-mentioned of the prior art how will be without insult area combination and any one scan line
The most not can completely scan the empty image of all bars of this bar code image cannot the defect of successfully decoded, it is provided that a kind of high-performance
Bar code decoding method.
In order to reach object above, the technical solution adopted in the present invention is: a kind of high-performance bar code decoding method includes
Following steps:
(1) first judge the type of bar code, according to the type of bar code, then according to certain intervals scanning barcode, obtain A0, A1,
A2 ..., n bar scan line altogether；
(2) according to the bar sky ratio of every scan line, the bar sky ratio of known various bar code starting character is contrasted, it is judged that this scan line can
It can be any bar code；For there being the scan line being stained, it is more likely that can not judge barcode types；
(3) add up the possible barcode types that all scan lines calculate, select the most barcode types of occurrence number as this
The barcode types of decoding；Record scan line Ax being judged as this barcode types, as sweep starting point simultaneously；
(4) according to the barcode types calculated, scanning limit, limit decodes, and obtains the elementary cell of each code word, i.e. empty by several long narrow tables
Composition；
(5) scan line Ax, finds 1 code word backward, is decoded according to barcode types；
(6) statistical decoder result, selects the decoded result that occurrence number is most, as the decoded result of this code word；It is stored in decoding
In result；And scan line Ay that minute book codeword decoding is correct；
(7) according to the bar empty position of this code word in scan line Ay, other scan line not calculated is searched for, if also having it
Its scan line decoding is correct, this scan line is added in Ay；
(8) scan line Ax being emptied, scan line Ay is stored in Ax, returns in step (5), solves next code word, the like,
Until not having code word to solve, or there is codeword decoding failure；
(9) decoded result calculates verification according to barcode types, it may be judged whether successfully decoded.
The invention has the beneficial effects as follows: compared with prior art, method provided by the present invention can successfully manage reality
The image that in situation, any one scan line the most not can completely scans all bars of this bar code image empty cannot successfully decoded
Problem, improve decoding rate.Meanwhile, this high-performance bar code decoding method also has high-performance, also has for noisy image
The decoding capability that energy is strong.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention flow chart.
Fig. 2 is that the embodiment of the present invention has the Code128 code schematic diagram being stained.
Fig. 3 is that embodiment of the present invention Code128 code type judges schematic diagram.
Fig. 4 is embodiment of the present invention Code128 code StartC starting character schematic diagram.
Fig. 5 is that embodiment of the present invention Code128 code StartC starting character judges type schematic diagram.
Fig. 6 is first code word schematic diagram of embodiment of the present invention Code128 code solution.
Fig. 7 is second code word schematic diagram of embodiment of the present invention Code128 code solution.
Fig. 8 is that embodiment of the present invention Code128 code solves the 3rd code word schematic diagram.
Fig. 9 is that embodiment of the present invention Code128 code has decoded word schematic diagram.
Figure 10 is that the embodiment of the present invention has the Code93 code schematic diagram being stained.
Figure 11 is embodiment of the present invention Code93 code StartC starting character schematic diagram.
Detailed description of the invention
The present invention is described in detail with embodiment below in conjunction with the accompanying drawings.
The present invention, by while scanning, identifies, while combination, has scanned the method i.e. decoded, has had effect
The image any one scan line the most not can completely in practical situation scanning all bars of this bar code image empty cannot solve
Code successfully problem, the problem that simultaneously can solve how will to combine without insult area, improves decoding rate, for noisy figure
As also there being the decoding capability that energy is strong.
The invention provides embodiment: as it is shown in figure 1, first judge barcode types, determine scanning according to barcode types, solve
Code parameter, comprises the following steps:
(1) type of bar code is first judged, for there being the scan line being stained, it is more likely that can not judge barcode types；As shown in Figure 2
Be stained serious Code128 code, as shown in Figure 10 be stained serious Code93 code schematic diagram.
According to the type of bar code, then according to certain intervals scanning barcode, as it is shown on figure 3, Code128 code interval is arranged
Become 8 row, obtain A0, A1, A2 ..., 8 scan lines altogether；
(2) according to the bar sky ratio of Code128 every the scan line of code shown in Fig. 3, the bar of known various bar code starting character is contrasted
Empty ratio, it is judged that what bar code is this scan line be probably；As shown in Figure 4: in Code128 bar code, StartC starting character is 33 skies,
Wherein bar sky ratio is: 211232；As shown in figure 11: Code93 bar code starting character is 33 skies, and wherein bar sky ratio is:
111141；Find StartC starting character in Code128 bar code, carry out the judgement of Code128 code type as shown in Figure 5；
(3) add up the possible barcode types that all scan lines calculate, select the most barcode types of occurrence number as this
The barcode types of decoding；Record scan line Ax being judged as this barcode types, as sweep starting point simultaneously；
(4) according to the barcode types calculated, scanning limit, limit decodes, obtains the elementary cell of each code word, such as: Code128 is by 3
The empty composition of bar 3, Code93 is made up of 33 skies.
(5) scan line Ax, finds 1 code word (Code128 code is 33 skies) as shown in Figure 6, backward according to barcode types
It is decoded；
(6) statistical decoder result, selects the decoded result that occurrence number is most, as the decoded result of this code word；It is stored in decoding
In result；And scan line Ay that minute book codeword decoding is correct；
(7) according to the bar empty position of this code word in scan line Ay, other scan line not calculated is searched for, if also having it
Its scan line decoding is correct, this scan line is added in Ay；
(8) scan line Ax being emptied, scan line Ay is stored in Ax, returns in step (5), solves next code word, such as Fig. 7-9 institute
Show, the like, until not having code word to solve, or there is codeword decoding failure；In Code128 code decoding process, can be certainly
Dynamic will calculate correct region, and merge；
(9) decoded result calculates verification according to barcode types, it may be judged whether successfully decoded.
The present invention, by first judging barcode types, determines scanning, decoding parametric according to barcode types, then uses
Scanning, identifies, while combination, has scanned the method step i.e. decoded, has improved decoding ranges, improves decoding speed
Degree, has high-performance, also has, for noisy image, the decoding capability that energy is strong.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the present invention.
Multiple amendment to these embodiments will be apparent from for those skilled in the art, as defined herein
General Principle can realize without departing from the spirit or scope of the present invention in other embodiments；Therefore, the present invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and principles disclosed herein and features of novelty phase one
The widest scope caused.
Claims (1)
1. a high-performance bar code decoding method, it is characterised in that: described a kind of high-performance bar code decoding method includes following step
Rapid:
(1) first judge the type of bar code, according to the type of bar code, then according to certain intervals scanning barcode, obtain A0, A1,
A2 ..., n bar scan line altogether；
(2) according to the bar sky ratio of every scan line, the bar sky ratio of known various bar code starting character is contrasted, it is judged that this scan line can
It can be any bar code；
(3) add up the possible barcode types that all scan lines calculate, select the most barcode types of occurrence number as this
The barcode types of decoding；Record scan line Ax being judged as this barcode types, as sweep starting point simultaneously；
(4) according to the barcode types calculated, scanning limit, limit decodes, obtains the elementary cell of each code word；
(5) scan line Ax, finds 1 code word backward, is decoded according to barcode types；
(6) statistical decoder result, selects the decoded result that occurrence number is most, as the decoded result of this code word；It is stored in decoding
In result；And scan line Ay that minute book codeword decoding is correct；
(7) according to the bar empty position of this code word in scan line Ay, other scan line not calculated is searched for, if also having it
Its scan line decoding is correct, this scan line is added in Ay；
(8) scan line Ax being emptied, scan line Ay is stored in Ax, returns in step (5), solves next code word, the like,
Until not having code word to solve, or there is codeword decoding failure；
(9) decoded result calculates verification according to barcode types, it may be judged whether successfully decoded.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107016318A (en) * | 2017-03-21 | 2017-08-04 | 浙江华睿科技有限公司 | A kind of bar code decoding method and device |
| CN107016317A (en) * | 2017-03-02 | 2017-08-04 | 浙江华睿科技有限公司 | A kind of bar code decoding method and device |
| CN107766770A (en) * | 2017-10-31 | 2018-03-06 | 广东旭龙物联科技股份有限公司 | A kind of EAN13 codes coding/decoding method and device |
| CN108090390A (en) * | 2017-12-28 | 2018-05-29 | 广州尚臣电子有限公司 | A kind of bar code stitching algorithm |
| CN111008540A (en) * | 2019-11-29 | 2020-04-14 | 联想(北京)有限公司 | Bar code identification method and equipment and computer storage medium |
| CN111488748A (en) * | 2019-01-25 | 2020-08-04 | 顺丰科技有限公司 | Logistics scanning system and method |
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| US8523076B2 (en) * | 2012-01-10 | 2013-09-03 | Metrologic Instruments, Inc. | Omnidirectional laser scanning bar code symbol reader generating a laser scanning pattern with a highly non-uniform scan density with respect to line orientation |
| CN102880850B (en) * | 2012-09-19 | 2015-08-19 | 腾讯科技（深圳）有限公司 | A kind of method of Quick Response Code batch scanning and scanning device |
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| CN201294002Y (en) * | 2008-08-12 | 2009-08-19 | 东莞文胜鼎电子科技有限公司 | Bar-code scanning system based on ZigBee wireless transmission |
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| CN107016317A (en) * | 2017-03-02 | 2017-08-04 | 浙江华睿科技有限公司 | A kind of bar code decoding method and device |
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| CN107016318A (en) * | 2017-03-21 | 2017-08-04 | 浙江华睿科技有限公司 | A kind of bar code decoding method and device |
| CN107016318B (en) * | 2017-03-21 | 2019-09-17 | 浙江华睿科技有限公司 | A kind of bar code decoding method and device |
| CN107766770A (en) * | 2017-10-31 | 2018-03-06 | 广东旭龙物联科技股份有限公司 | A kind of EAN13 codes coding/decoding method and device |
| CN108090390A (en) * | 2017-12-28 | 2018-05-29 | 广州尚臣电子有限公司 | A kind of bar code stitching algorithm |
| CN111488748A (en) * | 2019-01-25 | 2020-08-04 | 顺丰科技有限公司 | Logistics scanning system and method |
| CN111008540A (en) * | 2019-11-29 | 2020-04-14 | 联想(北京)有限公司 | Bar code identification method and equipment and computer storage medium |
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| CN106203216B (en) | 2018-11-09 |
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