CN109409147A - A kind of bar code recognition and device - Google Patents
A kind of bar code recognition and device Download PDFInfo
- Publication number
- CN109409147A CN109409147A CN201710702823.2A CN201710702823A CN109409147A CN 109409147 A CN109409147 A CN 109409147A CN 201710702823 A CN201710702823 A CN 201710702823A CN 109409147 A CN109409147 A CN 109409147A
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- China
- Prior art keywords
- camera
- bar code
- identification frame
- frame
- identification
- Prior art date
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10544—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation by scanning of the records by radiation in the optical part of the electromagnetic spectrum
- G06K7/10792—Special measures in relation to the object to be scanned
- G06K7/10801—Multidistance reading
- G06K7/10811—Focalisation
-
- 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
- G06K7/146—Methods for optical code recognition the method including quality enhancement steps
Abstract
The present invention relates to field of image recognition more particularly to a kind of bar code recognitions and device.It should be the described method includes: obtaining bar code image by first camera；The bar code image is matched with default identification frame；If being unsatisfactory for matching condition, it is switched to the second camera and bar code is identified；Wherein, first camera is different with the second camera focal length.Meanwhile a kind of corresponding bar code identifying device is also disclosed by invention.The present invention can be improved bar code recognition efficiency, user-friendly.
Description
Technical field
The present invention relates to field of image recognition more particularly to a kind of bar code recognitions and device
Background technique
Bar code includes bar code (bar code) and two-dimensional bar code (bar code).With the rise of mobile network, the fortune of bar code
With more more and more universal, mobile payment, APP downloading, public platform concern, merchandise news etc..In daily life, bar code has become
The pith of one reading information.
Currently, mobile phone camera commonly identifies there are two types of bar code methods at present, one is directly to camera shooting
Original image carries out image recognition；Another is that (i.e. digital change is intercepted and amplified to the original image of camera shooting
It is burnt) after carry out image recognition again.The equal existing defects of both methods: for directly carrying out image with camera shooting original image
Identification, when apart from farther out, bar code only accounts for entire shooting image small part, such that recognition time increases.It is right
When using Digital Zoom to identify bar code, when apart from farther out, image frame loss is serious, greatly reduces accuracy of identification.
Present invention is generally directed to the not high problems of bar code recognition efficiency, propose a kind of new bar code recognition.This method
The convenience of bar code identification can be effectively improved, recognition efficiency is improved.
Summary of the invention
In order to overcome drawbacks described above, the present invention provides a kind of more efficiently bar code identification side.
One embodiment of the present of invention provides a kind of bar code recognition, and stating terminal applied to terminal includes at least two
A camera, which comprises
Bar code image is obtained by first camera；
The bar code image is matched with default identification frame；
If being unsatisfactory for matching condition, it is switched to the second camera and bar code is identified；
Wherein, first camera is different with the second camera focal length.
Further, the default identification frame, comprising:
The identification frame is determined according to the enlargement ratio ratio between first camera and the second camera
The ratio on adjacent both sides；
Set the length of the wherein a line of the identification frame；
By it is described identification frame adjacent two edges ratio and setting the identification frame wherein a line length come
Determine the length of another a line.
Further, the default identification frame further includes the distance of the identification frame central point to the center's point of screen
Equal to the spacing of first camera and the second camera；
Wherein, it is described identification frame central point relative to the center's point of screen direction and the second camera relative to
The direction of first camera is consistent.
Optionally, first camera is wide-angle camera, and the second camera is focal length camera.
Further, it if described be unsatisfactory for matching condition, is switched to the second camera and the bar code is known
Not, comprising:
Judge whether the bar code image is greater than the identification frame；
If the bar code image is not more than the identification frame, it is switched to the second camera and is identified.
Optionally, first camera is focal length camera；The second camera is wide-angle camera.
Further, it if described be unsatisfactory for the matching condition, is switched to the second camera and bar code is known
Not, comprising:
Judge whether the bar code image is less than the identification frame；
If being switched to second camera not less than identification frame.
Further, further includes:
If meeting the matching condition, directly bar code is identified using first camera.
According to another embodiment of the present invention, a kind of bar code identifying device is provided, described device includes:
Image collection module, for obtaining the bar code image；
Identification frame sets up module, for setting up the identification frame；
Camera control module, for controlling the switching between first camera and the second camera；
Judgment module judges whether to meet described for matching the bar code image with preset identification frame
With condition；
Bar code identification module identifies the bar code image for controlling the camera, and to the data of extraction at
Reason.
Further, the identification frame sets up module, comprising:
Computing unit, by according to the enlargement ratio ratio between first camera and the second camera come based on
Calculate the ratio on the adjacent both sides of identification frame；
Setup unit, the length of the wherein a line for setting the identification frame；
Frame computing unit is identified, for calculating the size of the entire identification frame；
Identify frame central point distance unit, the distance for determining the identification frame central point to the center's point of screen；
It identifies frame localizer unit, determines institute for the direction according to the second camera relative to first camera
State direction of the identification frame central point relative to the center's point of screen.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
A kind of Fig. 1 bar code recognition flow chart provided in an embodiment of the present invention；
A kind of Fig. 2 bar code identifying device structure chart provided in an embodiment of the present invention；
A kind of Fig. 3 identification frame provided in an embodiment of the present invention sets up function structure chart
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
State that the specific embodiments are only for explaining the present invention, rather than limitation of the invention.It also should be noted that for the ease of
Description, only some but not all contents related to the present invention are shown in the drawings.
Fig. 1 shows first embodiment of the invention.
At least one embodiment provides a kind of bar code recognition.In example 1, Fig. 1 is that the embodiment of the present invention mentions
A kind of bar code recognition flow chart supplied.A kind of bar code recognition, comprising:
Step 1-1 obtains bar code image by the first camera；
Many terminals are equipped with double pick-up lens now.Here terminal includes mobile phone, tablet computer, handheld device
Deng.The configuration of dual camera also has many matching methods: wide-angle camera+focal length camera, colour imagery shot+black and white camera shooting
Head, high-resolution camera+low resolution camera etc., currently preferred is the combination of wide-angle camera+focal length camera.
Wide-angle camera refers to the camera with wide-angle lens.A kind of focal length of wide-angle lens is shorter than standard lens, visual angle
It is longer than fish eye lens greater than standard lens, focal length, visual angle is less than fish-eye photographic mirror.Since its visual angle is big, the visual field is broad.
From a certain viewing point to scenery range seen in same viewpoint than human eye it is much bigger；The depth of field is long, can show
Sizable definition range；It can emphasize the transparent effect of picture.Due to the present invention utilize be wide-angle camera focal length shorter than mark
Quasi- camera lens, visual angle are greater than the characteristic of standard lens, therefore are not limited to the camera lens, further include other mirrors with this characteristic
Head.
Focal length camera refers to the camera with long focal length lens.The focal length of zoom lens is long, visual angle is small, on egative film at
As big.The object for being suitable for shooting distant place becomes apparent from than general camera imaging when shooting the scene of distant place.Due to
What the present invention utilized is that focal length camera focal length is longer than standard lens, visual angle is less than standard lens, and imaging is more than general camera lens
Clear characteristic, therefore it is not limited to the camera lens, it further include other camera lenses with this characteristic.
Step 1-2 matches the bar code image with preset identification frame；
The foundation of preset identification frame described here, be first determining first camera and the second camera it
Between enlargement ratio ratio, then using the ratio of the enlargement ratio as it is described identification frame adjacent two edges ratio；Really
The length of the fixed identification frame wherein a line, then can determine the length of another a line according to the ratio on two sides
Degree.Obviously, identification frame described here is a rectangle.Certainly, the identification frame can be ellipse, diamond shape or circle.
Optionally, it when identifying frame is ellipse, at this moment will be put between first camera and the second camera
The ratio of big multiplying power, the ratio as the oval long axis and short axle.The length for determining a wherein axis, can thus calculate
The length of an other axis, the left back length according to two axis out can obtain the calculation formula of ellipse.
Optionally, it when the identification circle is diamond shape, will be regarded between first camera and the second camera
Then the ratio of angular difference determines the length of a wherein axis, can thus obtain as the ratio of the diamond shape long axis and short axle
The length of an other axis can obtain diamond shape finally according to the length of two axis.
Optionally, when it is round for identifying frame, which is equal to identification frame noted earlier when being rectangle, is somebody's turn to do
The cornerwise length of rectangle.
Here further include identify frame central point position determination, the present invention in, identification frame central point position be not
Positioned at screen centre position.But the distance for identifying frame central point to center's point of screen is equal to the first camera and second camera
Spacing.Meanwhile identifying that direction of the direction of frame also between the first camera and second camera is related.For example, first takes the photograph
As spacing is a between head and second camera；If second camera is located at the front-left of the first camera (with terminal front side level
Direction is reference).So identify at this time the central point of frame be located at apart from center's point of screen front-left and to center's point of screen away from
From for a.Similarly, if second camera is located at the front-right of the first camera (with terminal front side horizontal direction for reference).So
Identify that the central point of frame is located at apart from center's point of screen front-right and is a to the distance of center's point of screen at this time.
Here the bar code image of the acquisition is compared with identification frame, is exactly that the big of bar code image is less than identification frame
Size be compared.
Step 1-3 is switched to the second camera and identifies to bar code if being unsatisfactory for matching condition.
Here matching condition is different according to the difference of camera.First camera and second camera described here it
Between focal length be different.
Optionally, when the first camera is wide-angle camera, and second camera is focal length camera, matching condition at this time
Are as follows: judge whether bar code image is greater than identification frame.If the bar code image is no more than identification frame at this time, that is, is unsatisfactory for matching
Condition is then switched to second camera, that is, focal length camera is identified；If the bar code image is greater than identification frame,
Directly the first camera, that is, wide-angle camera is utilized to identify bar code.
Optionally, when the first camera is focal length camera, and second camera is wide-angle camera.Matching condition at this time
Are as follows: judge whether bar code image is less than identification frame.If the bar code image is not less than identification frame at this time, that is, is unsatisfactory for matching
Condition is then switched to second camera, that is, wide-angle camera is identified；If the bar code image is greater than identification frame,
Directly the first camera, that is, focal length camera is utilized to identify bar code.
It is by the switching between two different cameras of focal length, Lai Tigao bar code accuracy of identification in the present embodiment.
Meanwhile the ratio of identification frame adjacent two edges is determined by the ratio of the enlargement ratio between the first camera and second, so
The length of wherein a line is set afterwards, thus obtains the size of identification frame；On the other hand, at the position for determining scan box,
Using the distance between the first camera and second camera, as the distance of the identification frame central point to center's point of screen,
Meanwhile identifying direction and second color camera direction one relative to first camera of the frame central point relative to center's point of screen
It causes.Bar code image size is compared with identification frame, finally judges whether to need to switch camera according to comparison result.In this way
So that the switching time between camera is more accurate, (one is suitble to remote knowledge to a company of giving full play to camera evident characteristics
Not, one is suitble to closely identify).Embodiment improves bar code recognition efficiencies, increase bar code accuracy of identification, so that user grasps
It is more convenient to make.
Fig. 2 shows second embodiment of the invention.
At least one embodiment provides a kind of bar code identifying device.In this embodiment, Fig. 2 is a kind of bar code identification
Structure drawing of device.The bar code identifying device, comprising:
Image collection module, for obtaining bar code image；
Identification frame sets up module, for setting up identification frame；
Camera control module, for controlling the switching between the first camera and second camera；
Judgment module judges whether to meet matching item for matching the bar code image with preset identification frame
Part；
Bar code identification module for controlling the camera identification bar code image, and is handled the data of extraction.
It is by the switching between two different cameras of focal length, Lai Tigao bar code accuracy of identification in the present embodiment.
Bar code image is matched with identification frame, the camera of switching is determined a need for according to matching result, this makes user
It is in identification bar code, it is more convenient, it is not in closely to need mobile terminal very much apart from too far or distance.
Fig. 3 shows third embodiment of the invention.
At least one embodiment provides a kind of bar code identifying device.This third embodiment is the base in second embodiment
On plinth, module is set up to identification frame and is further limited.Fig. 3 is that identification frame sets up function structure chart.The bar code identification
Device, comprising:
Computing unit, for calculating identification according to the subtense angle between first camera and the second camera
The ratio on the adjacent both sides of frame；
Setup unit, the length of the wherein a line for setting the identification frame；
Frame computing unit is identified, for calculating the size of entire identification frame.
It is by the switching between two different cameras of focal length, Lai Tigao bar code accuracy of identification in the present embodiment.
Meanwhile the ratio of identification frame adjacent two edges is determined by the ratio of the enlargement ratio between the first camera and second, so
The length of wherein a line is set afterwards, thus obtains the size of identification frame；On the other hand, at the position for determining scan box,
Using the distance between the first camera and second camera, as the distance of the identification frame central point to center's point of screen,
Meanwhile identifying direction and second color camera direction one relative to first camera of the frame central point relative to center's point of screen
It causes.Bar code image size is compared with identification frame, finally judges whether to need to switch camera according to comparison result.In this way
So that the switching time between camera is more accurate, (one is suitble to remote knowledge to a company of giving full play to camera evident characteristics
Not, one is suitble to closely identify).Embodiment improves bar code recognition efficiencies, increase bar code accuracy of identification, so that user grasps
It is more convenient to make.
Claims (10)
1. a kind of bar code recognition, is applied to terminal, the terminal includes at least two cameras, which is characterized in that described
Method includes:
Bar code image is obtained by first camera；
The bar code image is matched with preset identification frame；
If being unsatisfactory for matching condition, it is switched to the second camera and bar code is identified；
Wherein, first camera is different with the second camera focal length.
2. a kind of bar code recognition according to claim 1, which is characterized in that the default identification frame, comprising:
Determine that the identification frame is adjacent according to the enlargement ratio ratio between first camera and the second camera
The ratio on both sides；
Set the length of the wherein a line of the identification frame；
By the ratio of the identification frame adjacent two edges and the length of the setting wherein a line for identifying frame come really
The length of fixed another a line.
3. a kind of bar code recognition according to claim 2, which is characterized in that the default identification frame further includes,
The distance of the identification frame central point to the center's point of screen is equal between first camera and the second camera
Away from；
Wherein, it is described identification frame central point relative to the center's point of screen direction with the second camera relative to described
The direction of first camera is consistent.
4. a kind of bar code recognition according to claim 1, which is characterized in that first camera is wide-angle imaging
Head, the second camera are focal length camera.
5. a kind of bar code recognition according to claim 3, which is characterized in that if described be unsatisfactory for matching condition,
Second camera is switched to identify bar code, comprising:
It is described to judge whether bar code image is greater than the identification frame；
If the bar code image is not more than the identification frame, it is switched to the second camera and is identified.
6. a kind of bar code recognition according to claim 1, which is characterized in that first camera is focal length camera shooting
Head；The second camera is wide-angle camera.
7. a kind of bar code recognition according to claim 5, which is characterized in that if described be unsatisfactory for matching condition,
Second camera is switched to identify bar code, comprising:
Judge whether bar code image is less than the identification frame；
If being not less than the identification frame, it is switched to the second camera.
8. a kind of bar code recognition according to claim 1, which is characterized in that further include:
If meeting the matching condition, directly the bar code is identified using first camera.
9. a kind of bar code identifying device, which is characterized in that described device includes:
Image collection module, for obtaining the bar code image；
Identification frame sets up module, for setting up the identification frame；
Camera control module, for controlling the switching between first camera and the second camera；
Judgment module judges whether to meet matching condition for matching the bar code image with preset identification frame；
Bar code identification module identifies the bar code image for controlling the camera, and handles the data of extraction.
10. a kind of bar code identifying device according to claim 8, which is characterized in that the identification frame sets up module, packet
It includes:
Computing unit is known for being calculated according to the enlargement ratio ratio between first camera and the second camera
The ratio on the adjacent both sides of other frame；
Setup unit, the length of the wherein a line for setting the identification frame；
Frame computing unit is identified, for calculating the size of the entire identification frame；
Identify frame central point distance unit, the distance for determining the identification frame central point to the center's point of screen；
It identifies frame localizer unit, determines the knowledge for the direction according to the second camera relative to first camera
Direction of the other frame central point relative to the center's point of screen.
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| CN201710702823.2A CN109409147B (en) | 2017-08-16 | 2017-08-16 | Bar code recognition method and device |
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|---|---|---|---|
| CN201710702823.2A CN109409147B (en) | 2017-08-16 | 2017-08-16 | Bar code recognition method and device |
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| CN109409147B CN109409147B (en) | 2023-08-08 |
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| CN109918957A (en) * | 2019-03-05 | 2019-06-21 | 大连民族大学 | A kind of terminal, the system and method for the remote two-dimensional code scanning of double vision |
| CN110059511A (en) * | 2019-03-08 | 2019-07-26 | 阿里巴巴集团控股有限公司 | A kind of scan code system and barcode scanning method |
| CN110348257A (en) * | 2019-06-24 | 2019-10-18 | 阿里巴巴集团控股有限公司 | A kind of bar code analysis method and device |
| CN111601043A (en) * | 2020-06-19 | 2020-08-28 | 杭州海康机器人技术有限公司 | Package shooting method and system |
| WO2021000063A1 (en) * | 2019-06-29 | 2021-01-07 | Qualcomm Incorporated | Automatic focus distance extension |
| CN113128243A (en) * | 2019-12-31 | 2021-07-16 | 苏州协尔智能光电有限公司 | Optical recognition system, optical recognition method and electronic equipment |
| CN114564975A (en) * | 2022-01-26 | 2022-05-31 | 苏州摩比信通智能系统有限公司 | Code scanning engine giving consideration to both long distance and short distance and code scanning method thereof |
| CN116301459A (en) * | 2023-02-27 | 2023-06-23 | 荣耀终端有限公司 | Code scanning method and related device |
| CN116506288A (en) * | 2022-12-14 | 2023-07-28 | 惠州迈腾伟业科技发展有限公司 | Wireless router parameter configuration method and system |
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| CN109918957A (en) * | 2019-03-05 | 2019-06-21 | 大连民族大学 | A kind of terminal, the system and method for the remote two-dimensional code scanning of double vision |
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| CN116301459A (en) * | 2023-02-27 | 2023-06-23 | 荣耀终端有限公司 | Code scanning method and related device |
| CN116301459B (en) * | 2023-02-27 | 2023-10-20 | 荣耀终端有限公司 | Code scanning method and related device |
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