CN106951813A - The coding/decoding method and system of a kind of bar code - Google Patents
The coding/decoding method and system of a kind of bar code Download PDFInfo
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- CN106951813A CN106951813A CN201710236024.0A CN201710236024A CN106951813A CN 106951813 A CN106951813 A CN 106951813A CN 201710236024 A CN201710236024 A CN 201710236024A CN 106951813 A CN106951813 A CN 106951813A
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- bar code
- picture
- exposure parameter
- brightness value
- interval
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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
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/71—Circuitry for evaluating the brightness variation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/70—Circuitry for compensating brightness variation in the scene
- H04N23/73—Circuitry for compensating brightness variation in the scene by influencing the exposure time
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
Abstract
The present invention relates to the coding/decoding method and system in decoding field, more particularly to a kind of bar code.The present invention obtains the first bar code picture by shooting bar code according to default first exposure parameter values；If decoding the first bar code picture failure,：Present system time is obtained, the time started is obtained；The value of dynamic adjustment exposure parameter, obtains the second exposure parameter values；Bar code is shot according to second exposure parameter values, the second bar code picture is obtained；Decode the second bar code picture；If the time interval of decoding the second bar code picture failure and the time started and present system time is less than default barcode scanning duration, repeat step S4 to S6.Realization can obtain the bar code information of complete display under different photoenvironments, so as to improve the success rate of decoding.
Description
Technical field
The present invention relates to the coding/decoding method and system in decoding field, more particularly to a kind of bar code.
Background technology
The fast development paid with barcode scanning, in the market directly carries out the demand of barcode scanning transaction also increasingly using POS
It is high.What is accordingly come is that decoding function performance and adaptability requirement are increased.Traditional coding/decoding method is, when the secondary figure of scanning one
When picture, light source is irradiated to back reflection light on image and converged to through lens in scanning module, by scanning module optical signal
Analog and digital signal is converted into, while pointing out that the gloomy degree of pixel, then analog to digital converter are converted into analog voltage
Digital signal, is sent to computer, and computer is decoded according to the digital signal got.
But, above-mentioned traditional coding/decoding method e.g., irradiates under environment or dark to the bad adaptability of environment in strong sunshine
Under environment, it is difficult to the information on image is correctly obtained by light reflection principle, so as to cause decoding to fail.
The content of the invention
The technical problems to be solved by the invention are：The coding/decoding method and system of a kind of bar code are provided, realized different
The bar code information of complete display can be obtained under photoenvironment, so as to improve the success rate of decoding.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
The present invention provides a kind of coding/decoding method of bar code, including：
S1, according to default first exposure parameter values shoot bar code, obtain the first bar code picture；
If S2, decoding the first bar code picture failure,：
S3, acquisition present system time, obtain the time started；
S4, dynamic adjustment exposure parameter value, obtain the second exposure parameter values；
S5, according to second exposure parameter values shoot bar code, obtain the second bar code picture；
S6, decoding the second bar code picture；
If S7, decoding the second bar code picture failure and the time started and present system time time interval are small
In default barcode scanning duration, then repeat step S4 to S6.
The present invention also provides a kind of solution code system of bar code, including：
First taking module, for shooting bar code according to default first exposure parameter values, obtains the first bar code picture；
Acquisition module, if for decoding the first bar code picture failure, present system time is obtained, when obtaining starting
Between；
Adjusting module, the value of exposure parameter is adjusted for dynamic, the second exposure parameter values are obtained；
Second taking module, for shooting bar code according to second exposure parameter values, obtains the second bar code picture；
Decoder module, for decoding the second bar code picture；
Jump module, if for decoding the second bar code picture failure and the time started and present system time
Time interval is less than default barcode scanning duration, then jumps to the adjusting module.
The beneficial effects of the present invention are：By dynamically adjusting the value of exposure parameter according to actual photoenvironment, and make
Bar code is shot with the value of the exposure parameter, realization can obtain the bar code information of complete display under different photoenvironments, from
And improve the success rate of decoding.
Brief description of the drawings
A kind of FB(flow block) of the embodiment of the coding/decoding method for bar code that Fig. 1 provides for the present invention；
A kind of structured flowchart of the embodiment of the solution code system for bar code that Fig. 2 provides for the present invention；
A kind of further structured flowchart of the embodiment of the solution code system for bar code that Fig. 3 provides for the present invention；
A kind of another further structural frames of the embodiment of the solution code system for bar code that Fig. 4 provides for the present invention
Figure；
Label declaration：
1st, the first taking module；2nd, acquisition module；3rd, adjusting module；31st, acquiring unit；32nd, the first setting unit；33、
Second setting unit；311st, the first computing unit；312nd, the second computing unit；
4th, the second taking module；5th, decoder module；6th, jump module；7th, presetting module；8th, configuration module.
Embodiment
To describe technology contents, the objects and the effects of the present invention in detail, below in conjunction with embodiment and coordinate attached
Figure is explained.
The design of most critical of the present invention is：Bar code is shot according to the value of the exposure parameter of dynamic adjustment, decoding is photographed
Bar code picture, realization the bar code information of complete display can be obtained under different photoenvironments so that improve decoding into
Power.
Fig. 1 be refer to Fig. 4,
As shown in figure 1, the present invention provides a kind of coding/decoding method of bar code, including：
S1, according to default first exposure parameter values shoot bar code, obtain the first bar code picture；
If S2, decoding the first bar code picture failure,：
S3, acquisition present system time, obtain the time started；
S4, dynamic adjustment exposure parameter value, obtain the second exposure parameter values；
S5, according to second exposure parameter values shoot bar code, obtain the second bar code picture；
S6, decoding the second bar code picture；
If S7, decoding the second bar code picture failure and the time started and present system time time interval are small
In default barcode scanning duration, then repeat step S4 to S6.
Further, also include：
Default two or more brightness value is interval；The brightness value interval includes it is expected that brightness value is interval；
For the corresponding exposure parameter values of remaining brightness value interval configuration in addition to the expectation brightness value is interval.
Seen from the above description, different interval numbers can be set according to demand, and there is its corresponding brightness in each interval
Value, also just correspond to reach and it is expected that brightness value needs to increase or decrease the amount of current exposure brightness parameter value, can be with most fast
Speed reach expectation brightness value, reduce repeat to set repeat to judge and adjustment process, so as to improve sweep speed.
Further, the S3 is specially：
The brightness value of the first bar code picture is obtained, picture luminance value is obtained；
If the picture luminance value is in the expectation brightness value is interval, it is described to set second exposure parameter values
First exposure parameter values；Otherwise：
It is the interval corresponding exposure parameter of brightness value where the picture luminance value to set second exposure parameter values
Value.
Seen from the above description, only when the picture luminance value comprising bar code information is not expecting that brightness value is interval interior,
When the bar code information in picture obtained by shooting is unintelligible complete, exposure parameter values are just adjusted.
Further, the brightness value of the first bar code picture is obtained, picture luminance value is obtained, is specially：
The average brightness value of the first bar code picture is calculated, picture luminance value is obtained.
Further, the brightness value of the first bar code picture is obtained, picture luminance value is obtained, is specially：
The average brightness value in default center region in the first bar code picture is calculated, picture luminance value is obtained.
Seen from the above description, when scanned object is in the middle of picture, scanned object, can be with as the main body of brightness
Picture brightness correctly is adjusted back, the situation excessively bright or excessively dark to avoid the occurrence of scanned object, so as to preferably adapt to quilt
Scan object and background object emissivity or difference in brightness very big situation.
As shown in Figures 2 to 4, the present invention also provides a kind of solution code system of bar code, including：
First taking module 1, for shooting bar code according to default first exposure parameter values, obtains the first bar code picture；
Acquisition module 2, if for decoding the first bar code picture failure, obtaining present system time, being started
Time；
Adjusting module 3, the value of exposure parameter is adjusted for dynamic, the second exposure parameter values are obtained；
Second taking module 4, for shooting bar code according to second exposure parameter values, obtains the second bar code picture；
Decoder module 5, for decoding the second bar code picture；
Jump module 6, if for decoding the second bar code picture failure and the time started and present system time
Time interval be less than default barcode scanning duration, then jump to the adjusting module.
Further, also include：
Presetting module 7, it is interval for presetting two or more brightness value；The brightness value interval includes expecting brightness value area
Between；
Configuration module 8, for being exposed for remaining brightness value interval configuration in addition to the expectation brightness value is interval is corresponding
Optical parameter value.
Further, the adjusting module 3 includes：
Acquiring unit 31, the brightness value for obtaining the first bar code picture, obtains picture luminance value；
First setting unit 32, if setting described in the expectation brightness value is interval for the picture luminance value
Second exposure parameter values are first exposure parameter values；
Second setting unit 33, if setting institute not in the expectation brightness value is interval for the picture luminance value
State the interval corresponding exposure parameter values of brightness value of second exposure parameter values where the picture luminance value.
Further, the acquiring unit 31 includes：
First computing unit 311, the average brightness value for calculating the first bar code picture, obtains picture luminance value.
Further, the acquiring unit 31 includes：
Second computing unit 312, the average brightness value for calculating default center region in the first bar code picture, is obtained
To picture luminance value.
Embodiments of the invention one are：
The present embodiment provides a kind of coding/decoding method of bar code, comprises the following steps：
S1, default two or more brightness value are interval；The brightness value interval includes it is expected that brightness value is interval；For except described
Expect the corresponding exposure parameter values of remaining brightness value interval configuration outside brightness value interval；
Wherein, 5 brightness value intervals A, B, C, D, E are preset；Brightness value interval C is interval for expectation brightness value；
By taking brightness value 0~255 as an example, brightness value 0~255 can be averagely divided into 5 intervals, wherein, expect brightness value
Interval is 150~200, if the brightness value photographed belongs in the range of interval 0~50, and exposure parameter needs the time for exposure set
4 times are accordingly increased with the total increment of gain；
S2, according to default first exposure parameter values shoot bar code, obtain the first bar code picture；
If S3, decoding the first bar code picture failure,：
S4, acquisition present system time, obtain the time started；
S5, dynamic adjustment exposure parameter value, obtain the second exposure parameter values；Specially：
S51, the brightness value for obtaining the first bar code picture, obtain picture luminance value；
Wherein, the mode for calculating picture luminance value has following two,
Mode one：The average brightness value of the first bar code picture is calculated, picture luminance value is obtained.
Mode two：The average brightness value in default center region in the first bar code picture is calculated, picture luminance value is obtained；
If S52, the picture luminance value are in the expectation brightness value is interval, second exposure parameter values are set to be
First exposure parameter values；Otherwise：It is the brightness value area where the picture luminance value to set second exposure parameter values
Between corresponding exposure parameter values.
S6, according to second exposure parameter values shoot bar code, obtain the second bar code picture；
S7, decoding the second bar code picture；
If S8, decoding the second bar code picture failure and the time started and present system time time interval are small
In default barcode scanning duration, then repeat step S5 to S7.
Embodiments of the invention two are：
The present embodiment provides a kind of solution code system of bar code, including：
It is interval that presetting module 7 presets two or more brightness value；The brightness value interval includes it is expected that brightness value is interval；Configuration
Module 8 is the corresponding exposure parameter values of remaining brightness value interval configuration in addition to the expectation brightness value is interval；
First taking module 1 shoots bar code according to default first exposure parameter values, obtains the first bar code picture；
If decoding the first bar code picture failure, acquisition module 2 obtains present system time, obtains the time started；
The value of the dynamic adjustment exposure parameter of adjusting module 3, obtains the second exposure parameter values；Specifically：Acquiring unit 31 is obtained
The brightness value of the first bar code picture is taken, picture luminance value is obtained；If the picture luminance value is in the expectation brightness value area
In, then it is first exposure parameter values that the first setting unit 32, which sets second exposure parameter values,；If the picture is bright
Angle value is not in the expectation brightness value is interval, then it is the picture that the second setting unit 33, which sets second exposure parameter values,
The interval corresponding exposure parameter values of brightness value where brightness value；
Wherein, as shown in Figure 3 and Figure 4, acquiring unit 31 includes the first computing unit 311 or the second computing unit 312；The
One computing unit 311, the average brightness value for calculating the first bar code picture, obtains picture luminance value；Second calculates single
Member 312, the average brightness value for calculating default center region in the first bar code picture obtains picture luminance value；
Second taking module 4 shoots bar code according to second exposure parameter values, obtains the second bar code picture；Decoder module
5 decoding the second bar code pictures；
If the time interval of decoding the second bar code picture failure and the time started and present system time is less than
Default barcode scanning duration, then jump to the adjusting module by jump module 6.
In summary, the coding/decoding method and system for a kind of bar code that the present invention is provided, by according to actual photoenvironment
The value of dynamic adjustment exposure parameter, and bar code is shot using the value of the exposure parameter, realize under different photoenvironments
The bar code information of complete display is obtained, so as to improve the success rate of decoding.
Embodiments of the invention are the foregoing is only, are not intended to limit the scope of the invention, it is every to utilize this hair
The equivalents that bright specification and accompanying drawing content are made, or the technical field of correlation is directly or indirectly used in, similarly include
In the scope of patent protection of the present invention.
Claims (10)
1. a kind of coding/decoding method of bar code, it is characterised in that including：
S1, according to default first exposure parameter values shoot bar code, obtain the first bar code picture；
If S2, decoding the first bar code picture failure,：
S3, acquisition present system time, obtain the time started；
S4, dynamic adjustment exposure parameter value, obtain the second exposure parameter values；
S5, according to second exposure parameter values shoot bar code, obtain the second bar code picture；
S6, decoding the second bar code picture；
If S7, decoding the second bar code picture failure and the time started and present system time time interval are less than pre-
If barcode scanning duration, then repeat step S4 to S6.
2. the coding/decoding method of bar code according to claim 1, it is characterised in that also include：
Default two or more brightness value is interval；The brightness value interval includes it is expected that brightness value is interval；
For the corresponding exposure parameter values of remaining brightness value interval configuration in addition to the expectation brightness value is interval.
3. the coding/decoding method of bar code according to claim 2, it is characterised in that the S4 is specially：
The brightness value of the first bar code picture is obtained, picture luminance value is obtained；
If the picture luminance value is in the expectation brightness value is interval, it is described first to set second exposure parameter values
Exposure parameter values；Otherwise：
It is the interval corresponding exposure parameter values of brightness value where the picture luminance value to set second exposure parameter values.
4. the coding/decoding method of bar code according to claim 3, it is characterised in that obtain the brightness of the first bar code picture
Value, obtains picture luminance value, is specially：
The average brightness value of the first bar code picture is calculated, picture luminance value is obtained.
5. the coding/decoding method of bar code according to claim 3, it is characterised in that obtain the brightness of the first bar code picture
Value, obtains picture luminance value, is specially：
The average brightness value in default center region in the first bar code picture is calculated, picture luminance value is obtained.
6. a kind of solution code system of bar code, it is characterised in that including：
First taking module, for shooting bar code according to default first exposure parameter values, obtains the first bar code picture；
Acquisition module, if for decoding the first bar code picture failure, obtaining present system time, obtaining the time started；
Adjusting module, the value of exposure parameter is adjusted for dynamic, the second exposure parameter values are obtained；
Second taking module, for shooting bar code according to second exposure parameter values, obtains the second bar code picture；
Decoder module, for decoding the second bar code picture；
Jump module, if for decoding the second bar code picture failure and the time started and the time of present system time
Interval is less than default barcode scanning duration, then jumps to the adjusting module.
7. the solution code system of bar code according to claim 6, it is characterised in that also include：
Presetting module, it is interval for presetting two or more brightness value；The brightness value interval includes it is expected that brightness value is interval；
Configuration module, for configuring corresponding exposure parameter for remaining brightness value interval in addition to the expectation brightness value is interval
Value.
8. the solution code system of bar code according to claim 7, it is characterised in that the adjusting module includes：
Acquiring unit, the brightness value for obtaining the first bar code picture, obtains picture luminance value；
First setting unit, if setting described second to expose in the expectation brightness value is interval for the picture luminance value
Optical parameter value is first exposure parameter values；
Second setting unit, if setting described second not in the expectation brightness value is interval for the picture luminance value
Exposure parameter values are the interval corresponding exposure parameter values of brightness value where the picture luminance value.
9. the solution code system of bar code according to claim 8, it is characterised in that the acquiring unit includes：
First computing unit, the average brightness value for calculating the first bar code picture, obtains picture luminance value.
10. the solution code system of bar code according to claim 8, it is characterised in that the acquiring unit includes：
Second computing unit, the average brightness value for calculating default center region in the first bar code picture, obtains picture
Brightness value.
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| CN107844730A (en) * | 2017-11-07 | 2018-03-27 | 维沃移动通信有限公司 | A kind of graphic code scan method and mobile terminal |
| CN108763999A (en) * | 2018-04-17 | 2018-11-06 | 维沃移动通信有限公司 | Barcode recognition method and terminal device |
| CN108989668A (en) * | 2018-06-29 | 2018-12-11 | 维沃移动通信有限公司 | A kind of working method and mobile terminal of camera |
| CN109165539A (en) * | 2018-08-14 | 2019-01-08 | 奇酷互联网络科技（深圳）有限公司 | Barcode scanning light compensation method and device |
| CN110012235A (en) * | 2019-05-24 | 2019-07-12 | 上海商米科技有限公司 | Imagewise exposure control method and device, computer readable storage medium, system |
| CN113408314A (en) * | 2020-03-16 | 2021-09-17 | 华为技术有限公司 | Bar code identification method and related equipment |
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Application publication date: 20170714 |