CN109472178A - Two-dimensional code scanning method - Google Patents
Two-dimensional code scanning method Download PDFInfo
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- CN109472178A CN109472178A CN201811087733.8A CN201811087733A CN109472178A CN 109472178 A CN109472178 A CN 109472178A CN 201811087733 A CN201811087733 A CN 201811087733A CN 109472178 A CN109472178 A CN 109472178A
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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
- G06K7/1417—2D bar codes
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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
- G06K7/1439—Methods for optical code recognition including a method step for retrieval of the optical code
- G06K7/1443—Methods for optical code recognition including a method step for retrieval of the optical code locating of the code in an image
-
- 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
- G06K7/1439—Methods for optical code recognition including a method step for retrieval of the optical code
- G06K7/1456—Methods for optical code recognition including a method step for retrieval of the optical code determining the orientation of the optical code with respect to the reader and correcting therefore
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Abstract
The present invention relates to detection fields, specially two-dimensional code scanning method, its key points of the technical solution are that: when pcb board pushes in place, receive solution code instruction；Utilize camera captures images；Whether detection image has two dimensional code, if so, then pre-processed to image, otherwise recapture image；Processing is decoded to the two dimensional code captured；If successfully decoded, decoding result is returned, is decoded processing after otherwise repairing to image again；When pcb board pushes in place, the two dimensional code on pcb board is obtained using camera, and two dimensional code is decoded, decoded result is returned after obtaining the information of two dimensional code, and it is decoded again after being repaired after decoding failure to image, raising is decoded into power, instead of being manually scanned, detection efficiency is improved, decoding result reliability is high.
Description
Technical field
The present invention relates to detection fields, more specifically, it relates to two-dimensional code scanning method.
Background technique
With the progress of science and technology, electronics industry development is advanced by leaps and bounds, and electronic system becomes increasingly complex, ebctronic reliability
With maintainability require it is also higher and higher, pcb board as electronic system development and produce in important component, quality
Quality directly affects the quality of whole equipment.
Therefore it usually requires centainly to test pcb board in actual production process, be tested to pcb board
When, it needs first to read the two dimensional code on pcb board, is input in system after decoding, facilitate detection data corresponding with pcb board, then
Pcb board is fixed on corresponding fixture, and pushes in detection device and is tested.
The scanning of two dimensional code at present is carried out by staff's handheld scan gun, and detection efficiency is low.
Summary of the invention
The object of the present invention is to provide two-dimensional code scanning methods, obtain the two dimensional code on pcb board using camera and to two dimension
Code is decoded, and is obtained the information on two dimensional code and is returned the result, improves detection efficiency.
Above-mentioned technical purpose of the invention has the technical scheme that two-dimensional code scanning method, comprising:
When pcb board pushes in place, solution code instruction is received；Utilize camera captures images；Whether detection image has two dimensional code, if so, then
Image is pre-processed, otherwise recapture image；Processing is decoded to the two dimensional code captured；If successfully decoded,
Decoding result is returned, is decoded processing after otherwise repairing to image again.
By using above-mentioned technical proposal, when pcb board pushes in place, the two dimensional code on pcb board is obtained using camera, and
Two dimensional code is decoded, returns decoded as a result, and being carried out after decoding failure to image after obtaining the information of two dimensional code
It is decoded again after reparation, raising is decoded into power, instead of being manually scanned, improves detection efficiency, decoding result is reliable
Property it is high.
Preferably, the step of repairing to image includes: to cut two-dimension code area from capture image；Obtain two dimensional code
Angle is simultaneously become a full member；It repositions two-dimension code area and cuts；Two dimensional code surrounding is repaired；The image in 2 D code of reparation is put
At the background center that size, gray scale are suitable.
By using above-mentioned technical proposal, it is placed on after two dimensional code is adjusted and is repaired in suitable background in center,
Improve the probability of two dimensional code successfully decoded.
Preferably, when repairing to two dimensional code surrounding, the characteristic information for reading two dimensional code is chosen whether, if so, root
Two dimensional code surrounding is repaired according to characteristic information, otherwise, walking direction is carried out according to two dimensional code surrounding feature, and with default value
Two dimensional code surrounding is repaired.
By using above-mentioned technical proposal, repaired according to the characteristic information whether preset Scheme Choice reads two dimensional code
It is multiple, more suitable recovery scenario is selected, detection reliability is improved.
Preferably, when pre-processing to image, area-of-interest to be treated in image is set；Reset figure
The size of picture；Image is smoothed；Carry out histogram equalization processing.
By using above-mentioned technical proposal, image is pre-processed, improves the decoded success rate of two dimensional code and reliability.
Preferably, after receiving solution code instruction, judge whether upper decoding thread terminates, if so, continuing decoding line
Otherwise journey prompts camera just busy.
By using above-mentioned technical proposal, the decoding operate for carrying out two two dimensional codes simultaneously is avoided, data corruption is caused
Situation.
Preferably, before capturing image, judge whether camera needs to reload, if so, restarting camera, otherwise,
Judge whether camera has been opened, if so, otherwise camera is opened in the buffer area of cleaning camera.
By using above-mentioned technical proposal, if camera is reinserted into, need to reload camera, if camera has been beaten
It opens, then clears up the buffer area of camera, guarantee being normally carried out for decoding thread.
Preferably, when still failing after being decoded again after repairing to image, camera captures images are re-used.
By using above-mentioned technical proposal, failure is still decoded after repairing image, is reacquired image and is decoded operation,
Improve decoded success rate.
Preferably, when still failing after being decoded again after repairing to image, judge whether time-out, if so, returning
Time-out is returned, otherwise, re-uses camera captures images.
By using above-mentioned technical proposal, when decoding the time it takes more than preset time, judges time-out, terminate solution
The process of code simultaneously returns to time-out.
Preferably, before receiving solution code instruction, the calling of instruction is waited, if the instruction called is solution code instruction, is carried out
Decoding process；If the instruction called is to read configuration-direct, configuration and return value are read；If call instruction is write-in, configuration refers to
It enables, is then written and configures and return the result；If the instruction called is acquisition instruction list instruction, the instruction list of support is obtained simultaneously
Return instruction list；If the instruction called is the instruction of acquisition instruction directions for use, obtains and the usage for returning to corresponding instruction is said
It is bright.
It by using above-mentioned technical proposal, is acted accordingly when receiving different instructions, a variety of acquisition knots is provided
The method of fruit.
Preferably, instruction is called by RPC agreement.
By using above-mentioned technical proposal, the efficiency that instruction is called is improved.
In conclusion the invention has the following advantages: obtaining corresponding figure at the two dimensional code on pcb board using camera
Picture, and image is pre-processed, two dimensional code is decoded and obtain return after the information of two dimensional code it is decoded as a result, and
It is decoded again after being repaired after decoding failure to image, raising is decoded into power, instead of being manually scanned, improves
Detection efficiency, decoding result reliability are high.
Detailed description of the invention
Fig. 1 is the broad flow diagram of the present embodiment；
Fig. 2 is the decoding process figure of the present embodiment；
Fig. 3 is the decoding thread flow chart of the present embodiment；
Fig. 4 is the image preprocessing flow chart of the present embodiment；
Fig. 5 is the two dimensional code decoding process figure of the present embodiment.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
Following specific embodiments are only explanation of the invention, are not limitation of the present invention, art technology
Personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as
All by the protection of Patent Law in the scope of the claims invented above.
Two-dimensional code scanning method, as shown in Figure 1, comprising the following steps:
Start Json-RPC decoding service, waits and utilize RPC agreement call instruction, if the instruction called is solution code instruction,
It is decoded process, decoding result is returned to system by RPC agreement after decoding, solution code instruction is issued by fixture,
Pcb board to be measured is placed on fixture by staff, and when pushing in detection device, and fixture issues solution code instruction；
If the instruction called is to read configuration-direct, reads and configure and by RPC agreement return value；
If call instruction is write-in configuration-direct, is written and configures and returned the result by RPC agreement；
If the instruction called is acquisition instruction list instruction, the instruction list of support is obtained and by RPC agreement return instruction
List；
If the instruction called is the instruction of acquisition instruction directions for use, the usage of corresponding instruction is obtained and returned by RPC agreement
Explanation.
For decoding process, as shown in Fig. 2, first judging whether upper decoding thread terminates, if upper decoding thread has been tied
Beam then starts this decoding thread, and otherwise, label result is " camera is just busy " and returns the result.
It is synchronous that decoding thread is waited to terminate up to time-out in this decoding thread of beginning, if decoding process has not timed out,
It obtains decoding thread results and returns to decoding result, otherwise labeled as time-out, and terminate to decode thread, label result is " super
When ", and return the result.
For decoding thread, as shown in figure 3, first judge whether camera needs to reload, if camera is reinserted into,
It needs to reload camera, if reloading camera, restarts camera, then utilize two dimensional code in camera capture pcb board
The image of position.
If not reloading camera, judge whether camera has been opened, if camera has been opened, in the buffering of cleaning camera
The image of two dimensional code position in camera capture pcb board is utilized behind area.
If camera is not switched on, the operation for opening camera is carried out, if camera is successfully opened, captures pcb board using camera
Otherwise the result queue for decoding thread is " camera opens failure " by the image of middle two dimensional code position.
Whether after using camera captures images, detecting in captured picture has two dimensional code, if detecting without two dimension
Code, then reset focusing, the exposure value of camera, and recapture image, in time of the focusing, exposure value that reset camera
It is " no code " by the result queue for decoding thread when number is more than 2 times.
If having detected two dimensional code, image preprocessing is carried out, raising is decoded into power and quality, carries out in advance to image
After processing, two dimensional code decoding is carried out, if successfully decoded, the result output for decoding thread is decoding result, otherwise judges whether to surpass
When, if overtime, will decode thread result queue is time-out, otherwise recapture image.
For image preprocessing process, as shown in figure 4, its step is followed successively by region of interest to be treated in setting image
Domain, the size for resetting image, image is smoothed, carry out histogram equalization processing, output it is pretreated
Image improves the decoded success rate of two dimensional code and reliability.
Two dimensional code decoding process is as shown in figure 5, carry out two dimensional code decoding, two dimension to the two dimensional code in pretreated image
Code decoding algorithm is the prior art, and therefore not to repeat here, if successfully decoded, two dimensional code decoded information is exported as decoding result,
Otherwise processing is decoded after repairing to image again.
When being repaired to image, comprising the following steps:
Two-dimension code area is cut from capture image；
It obtains two dimensional code angle and becomes a full member；
It repositions two-dimension code area and cuts；
Two dimensional code surrounding is repaired；
The image in 2 D code of reparation is placed on the suitable background center of a size, gray scale.
When repairing to two dimensional code surrounding, the characteristic information for reading two dimensional code is chosen whether, if so, believing according to feature
Breath repairs two dimensional code surrounding, otherwise, carries out walking direction according to two dimensional code surrounding feature, and with default value to two dimensional code
Surrounding is repaired.
The utility model has the advantages that obtaining corresponding image at the two dimensional code on pcb board using camera, and image is pre-processed,
Being decoded and obtaining to two dimensional code returns after the information of two dimensional code decoded as a result, and carrying out after decoding failure to image
It is decoded again after reparation, raising is decoded into power, instead of being manually scanned, improves detection efficiency, decoding result is reliable
Property it is high.
Claims (10)
1. two-dimensional code scanning method characterized by comprising
When pcb board pushes in place, solution code instruction is received；
Utilize camera captures images；
Whether detection image has two dimensional code, if so, then pre-processed to image, otherwise recapture image；
Processing is decoded to the two dimensional code captured；
If successfully decoded, decoding result is returned, is decoded processing after otherwise repairing to image again.
2. two-dimensional code scanning method according to claim 1, which is characterized in that the step of repairing to image include:
Two-dimension code area is cut from capture image；
It obtains two dimensional code angle and becomes a full member；
It repositions two-dimension code area and cuts；
Two dimensional code surrounding is repaired；
The image in 2 D code of reparation is placed on the suitable background center of size, gray scale.
3. two-dimensional code scanning method according to claim 2, which is characterized in that when being repaired to two dimensional code surrounding,
The characteristic information of reading two dimensional code is chosen whether, if so, two dimensional code surrounding is repaired according to characteristic information, otherwise, according to
Two dimensional code surrounding feature carries out walking direction, and is repaired with default value to two dimensional code surrounding.
4. two-dimensional code scanning method according to claim 1, which is characterized in that when being pre-processed to image, setting
Area-of-interest to be treated in image；Reset the size of image；Image is smoothed；It is equal to carry out histogram
Weighing apparatusization processing.
5. two-dimensional code scanning method according to claim 1, which is characterized in that after receiving solution code instruction, in judgement
Whether one decoding thread terminates, if so, continuing to decode thread, otherwise, prompts camera just busy.
6. two-dimensional code scanning method according to claim 1, which is characterized in that before capturing image, whether judge camera
It needs to reload, if so, otherwise restarting camera judges whether camera has been opened, if so, the buffer area of cleaning camera,
Otherwise, camera is opened.
7. two-dimensional code scanning method according to claim 1, which is characterized in that carried out again after being repaired to image
When still failing after decoding, camera captures images are re-used.
8. two-dimensional code scanning method according to claim 7, which is characterized in that carried out again after being repaired to image
When still failing after decoding, judge whether time-out, if so, returning to time-out, otherwise, re-uses camera captures images.
9. two-dimensional code scanning method according to claim 1, which is characterized in that before receiving solution code instruction, wait instruction
Calling, if call instruction be solution code instruction, be decoded process；If the instruction called is to read configuration-direct, read
Take configuration and return value；If call instruction is write-in configuration-direct, is written and configures and return the result；If the instruction called is to obtain
Instruction fetch list instruction, then obtain the instruction list of support and return instruction list；If the instruction called is acquisition instruction usage
Illustrate to instruct, then obtains and return the directions for use of corresponding instruction.
10. two-dimensional code scanning method according to claim 9, which is characterized in that instruction is called by RPC agreement.
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| CN113221593A (en) * | 2021-04-19 | 2021-08-06 | 深圳市广和通无线股份有限公司 | Two-dimensional code information acquisition method, electronic device and storage medium |
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