CN109948608A - A kind of license plate number knows method for distinguishing, computer installation and computer readable storage medium - Google Patents
A kind of license plate number knows method for distinguishing, computer installation and computer readable storage medium Download PDFInfo
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- CN109948608A CN109948608A CN201910149977.2A CN201910149977A CN109948608A CN 109948608 A CN109948608 A CN 109948608A CN 201910149977 A CN201910149977 A CN 201910149977A CN 109948608 A CN109948608 A CN 109948608A
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Abstract
The present invention provides a kind of license plate number knowledge method for distinguishing, this method includes obtaining vision signal, after carrying out character recognition to frame license plate image signal each in vision signal, form license plate number information, each frame license plate image signal is corresponding with a license plate number information, identical license plate number information is divided into same license plate number information group, quantity statistics are carried out to each license plate number information group, judge whether occur the most license plate number information group of one group of quantity in the result of quantity statistics, if, it is then final license plate number information by the most license plate number information group acknowledge of quantity.The present invention also provides the computer installations and computer readable storage medium of realizing the above method.The present invention has the characteristics that accurately and effectively to identify the license plate number of vehicle.
Description
Technical field
The present invention relates to parking lot vehicle identification field, specifically a kind of vehicle number knows method for distinguishing, computer installation
And computer readable storage medium.
Background technique
License plate is the main identity information of vehicle, and common license plate is suspended from the physics license plate before and after vehicle, license plate
On license plate number be by number and letter constitute, under normal circumstances, parking lot to the method for testing vehicle register identification be by
Camera is arranged in parking lot, after vehicle enters the image pickup scope of camera, the picture signal of vehicle is intercepted by camera, so
The license plate number of vehicle is identified according to the picture signal of license plate to confirm the identity information of vehicle by identification device again afterwards.
But by identification device according to the image information of license plate identify vehicle license plate number accuracy and identification device property
Can be related, and the material of Hong Kong and Macao license plate for example Chinese for some areas, pattern, specification, size, installation position not
There is situations such as stringent unified standard, even more the parking location narrow space due to Hong Kong and Macao, insufficient light, causes to image
The image information of head interception license plate is not clear enough, so that the performance due to identification device is not high, appearance can not be to the identity of license plate
The case where information is accurately identified.
Summary of the invention
The first object of the present invention is to provide a kind of accurate and effective license plate number knowledge method for distinguishing.
The second object of the present invention is to provide the computer installation for realizing above-mentioned license plate number recognition methods.
The third object of the present invention is to provide the computer readable storage medium for realizing above-mentioned license plate number recognition methods.
In order to realize the first above-mentioned purpose, it includes obtaining video that a kind of license plate number provided by the invention, which knows method for distinguishing,
Signal forms multiple license plate number information, each frame after carrying out character recognition to frame license plate image signal each in vision signal
License plate image signal is corresponding with a license plate number information, and identical license plate number information is divided into same license plate number information
Group carries out quantity statistics to each license plate number information group, judges that one group of quantity whether occur most in the result of numerical control statistics
License plate number information group, if so, by the most license plate number information group acknowledge of quantity be final license plate number information.
From the foregoing, it can be seen that first passing through the vision signal that photographic device obtains license plate, then pass through identification device such as OCR light
It learns character recognition device and character recognition is carried out to frame license plate image signal each in vision signal, formed and each frame license plate image
The corresponding license plate number information of signal.Then, by the way that identical license plate number information is divided into same license plate number information
Group carries out quantity statistics to each license plate number information group, is final the most license plate number information group acknowledge of one group of quantity
License plate number information, to avoid not high plus the recognition performance of identification device due to parking lot environmental factor and part is caused to be known
Not Chu Lai license plate image information there is mistake to influencing recognition result, reach the mesh for accurately and effectively identifying license plate number
's.
Further embodiment is, if to the license plate number for occurring two groups or more identical most quantity in the result of quantity statistics
Each license plate number information parts in the identical license plate number information group of two groups or more quantity Biao Ji be then mould by information group
License plate number information unit is pasted, each fuzzy license plate number information unit is respectively sent to database.
As it can be seen that occur the license plate number information group of two groups or more identical most quantity in the result of quantity statistics, then table
Show the corresponding license plate number information identified of multiframe license plate image signal there are mistake, by two groups or more identical most quantity
Each license plate number information parts Biao Ji not be sent to data for fuzzy license plate number information unit in license plate number information group
Library is handled.
Further embodiment is, after each fuzzy license plate number information unit is respectively sent to database, executes: from number
According to main license plate number information associated by each fuzzy license plate number information unit is read in library respectively, each fuzzy license plate is judged
With the presence or absence of unique common main license plate number information between number information unit.
As it can be seen that be stored with main license plate number information associated by fuzzy license plate number information unit in database, up to passing through
The effect that database further accurately identifies fuzzy license plate number information unit.
Further embodiment is, if the common main license plate number of existence anduniquess between each fuzzy license plate number information unit
Main license plate number information is then added in quantity statistics with preset quantity and carries out quantity statistics again by information.
As it can be seen that there is common main license plate number information between each fuzzy license plate number information unit, then it represents that the master
License plate number information is that the probability of final license plate number information is larger, by the way that number is added with preset quantity in main license plate number information
Quantity statistics again are carried out in amount statistics, achieve the purpose that effectively to identify license plate number.
Further embodiment is, to the license plate number information group of main license plate number information and two groups or more identical most quantity
It after carrying out quantity statistics again, executes: judging to whether there is license plate identical with main license plate number information in quantity statistics again
Number information group, preset quantity, then be added to and master by license plate number information group identical with main license plate number information if it exists
The identical license plate number information group of license plate number information, by license plate number that one group of quantity is most in the result of quantity statistics again
Code information group acknowledge is final license plate number information.
As it can be seen that there is license plate number information group identical with main license plate number information during quantity statistics again, then may be used
The identical license plate number information of main license plate number information is given with the quantity throwing of the main license plate.
Further embodiment is, if there is no unique common main license plate numbers between each fuzzy license plate number information unit
Code information, then issue prompt information, multiframe license plate image signal corresponding to each fuzzy license plate number information unit shown
Out, the final license plate number information flag for receiving input is main license plate number by the final license plate number information for receiving input
After information, be sent to after each fuzzy license plate number information unit is associated with main license plate number information respectively database into
Row storage.
Further embodiment is to obtain vision signal, comprising: obtains high definition video signal.
As it can be seen that further increasing the accuracy of identification by obtaining high definition video signal.
Further embodiment is after final license plate number information, to hold the most license plate number information group acknowledge of quantity
Row: final license plate number information is shown.
As it can be seen that facilitating parking lot associate people to check the identity of vehicle by showing final license plate number information
Information.
In order to realize above-mentioned second purpose, the present invention also provides computer installation further include processor and memory,
Memory is stored with computer program, and each of above-mentioned license plate number recognition methods is realized when computer program is executed by processor
Step.
In order to realize above-mentioned third purpose, the present invention also provides computer readable storage medium on be stored with computer
Program, the computer program realize each step of above-mentioned license plate number recognition methods when being executed by processor.
Detailed description of the invention
Fig. 1 is a kind of flow chart of license plate number recognition methods embodiment of the present invention.
Below in conjunction with attached drawing and embodiment, the invention will be further described.
Specific embodiment
The present invention provides a kind of license plate number recognition methods, applies on the terminal device that can obtain vision signal, allusion quotation
Type is applied on the terminal devices such as computer, and computer installation of the invention can be above-mentioned electronic equipment, computer-readable
Storage medium can be the various storage mediums with data storage function, such as FLAASH, EEPROM nonvolatile memory.
License plate number recognition methods embodiment:
Preferred terminal device is the terminal devices such as desktop computer or server in the present embodiment.
Referring to Fig. 1, step S1 is first carried out in this method, vision signal is obtained, to frame license plate image each in vision signal
After signal carries out character recognition, multiple license plate number information are formed.For example, the vision signal of license plate is obtained by photographic device,
Then character is carried out to frame license plate image signal each in vision signal by identification device such as OCR optical character recognition device
Identification, forms multiple license plate number information, and each frame license plate image signal is corresponding with a license plate number information.Wherein, it obtains
Taking vision signal includes obtaining high definition video signal, for example, by setting high definition version for the clarity of photographic device
The mode of clarity obtains high definition video signal.
Then, step S2 is executed, identical license plate number information is divided into same license plate number information group, to each vehicle
Board number information group carries out quantity statistics.Wherein, the quantity of identical license plate number information is in each license plate number information group
The obtained quantitative value of quantity statistics is carried out for the license plate number information.
Then, step S3 is executed, judges whether occur the most license plate number letter of one group of quantity in the result of quantity statistics
The most license plate number validation of information of quantity is final license plate number information if so, thening follow the steps S4 by breath group.As it can be seen that energy
Enough the quantity of identical license plate number information is most in the most license plate number information group of confirmation quantity, i.e. the license plate number information
The frequency highest that the corresponding identical license plate image signal of multiframe of group occurs in a vision signal, then by the license plate number
Information group acknowledge is final license board information.
If occurring the license plate number information group of two groups or more identical most quantity in the result of quantity statistics, then follow the steps
Each license plate number field mark in the license plate number information of multiple identical most quantity is a fuzzy license plate number by S5
Each fuzzy license plate number information unit is respectively sent to database by information unit.In the present embodiment, database is that terminal is set
For the database of itself, database purchase has main license plate number information associated by each fuzzy license plate number information unit.It can
See occur the license plate number information group of two groups or more identical most quantity in the result of quantity statistics, then it represents that can not effectively know
Not Chu final license board information, by by each license plate number information in the license plate number information of more than one identical most quantity
Group echo is a fuzzy license plate number information unit, and each fuzzy license plate number information unit is respectively sent to database and is reached
To the purpose further identified to fuzzy license plate number information unit.
Then, step S6 is executed, reads master associated by each fuzzy license plate number information unit respectively from database
License plate number information.As it can be seen that each fuzzy license plate number information unit is respectively sent to database, then database root is according to every
One fuzzy license plate number information unit finds out main license plate number letter associated by each fuzzy license plate number information unit respectively
Breath, in this way, it is possible to read main license plate number letter corresponding to each fuzzy license plate number information unit respectively from database
Breath.
Then, step S7 is executed, judges that main license plate number information associated by each fuzzy license plate number information unit is
It is no to there is common main license plate number information.If so, executing step S8, quantity is added with preset quantity in main license plate number information
Quantity statistics again are carried out in statistics.In the present embodiment, after there are unrecognized multiple fuzzy license plate number information units,
Multiframe license plate image signal corresponding to fuzzy license plate number information unit is identified eventually by parking lot management personnel
The final license plate number information obtained afterwards is main license board information by the final license plate number information flag that manual identified goes out, and
After the main license board information that manual identified comes out is associated respectively with unrecognized multiple fuzzy license plate number information units
Pending data library is sent to be stored.In this way, judging main license plate number letter associated by each fuzzy license plate number information unit
There is common main license plate number information in breath, then it represents that the main license plate number information and unrecognized multiple fuzzy license plate numbers
Information unit is all associated with, and main license plate number information is that the probability of final license plate number information is larger, can main license plate number letter
Breath is added in quantity statistics with preset quantity and carries out quantity statistics again.
If executing step there is no unique common main license plate number information between each fuzzy license plate number information unit
Rapid S12 issues prompt information, multiframe license plate image signal corresponding to each fuzzy license plate number information unit is shown
Come, receive the final license plate number information of input, is main license plate number letter by the final license plate number information flag for receiving input
After breath, database progress is sent to after each fuzzy license plate number information unit is associated with main license plate number information respectively
Storage.In this way, prompt information is issued when there are unrecognized multiple fuzzy license plate number information units, for example, by raising
The devices such as sound device issue suggestion voice or are reminded by light emitting device, and reminding the administrative staff in parking lot to occur can not
The unit of multiple fuzzy license plates of identification, and multiframe license plate image corresponding to each fuzzy license plate number information unit is believed
It number shows, in this way, going out final license plate number information by manual identified.Preferably, by each fuzzy license plate number information
Unit is sent to database after being associated respectively with main license plate number information and is stored, to increase the number in database
It is believed that breath, reaches next time when there are unrecognized multiple fuzzy license plate number information unit informations, fuzzy vehicle can be passed through
Main license plate number information associated by trade mark code information unit information increases the accuracy for identifying final license plate number information.
Then, step S9 is executed, judges to whether there is license plate identical with main license plate number information in quantity statistics again
Number information group.If so, thening follow the steps S10, the preset quantity of main license plate number information is added to and is believed with main license plate number
Identical license plate number information group is ceased, is by the most license plate number information group acknowledge of quantity in the result of quantity statistics again
Final license plate number information group.In the present embodiment, due to main license plate number information be final license plate number information probability it is larger,
Comparatively high amts can be set by the preset quantity of main license plate number information, for example, most quantity are 8 in quantity statistics before,
Then the preset quantity of main license plate number information can be set as being added in quantity statistics again after 8 or 7.In this way, judgement weight
There is license plate number information group identical with main license plate number information in new quantity statistics, just by the default of main license plate number information
Quantity is added to license plate number information group identical with main license plate number information, reaches and accurately and effectively identifies final license plate number
The purpose of code information group.
If being not present in the identical license plate number information group of main license plate number information in quantity statistics again, then follow the steps
S12 issues prompt information, multiframe license plate image signal corresponding to each fuzzy license plate number information unit is shown,
The final license plate number information flag for receiving input is main license plate number information by the final license plate number information for receiving input
Afterwards, database is sent to after each fuzzy license plate number information unit being associated with main license plate number information respectively to deposit
Storage.
Finally, executing step S11, final license plate number information is shown.In this way, the administrative staff in parking lot can
The license plate number of vehicle is viewed on the display interface of terminal device.
It can be seen from the above, in the present embodiment, first to license plate number corresponding to frame license plate image information each in vision signal
Code information is divided into same license plate number information group, during carrying out quantity statistics to multiple license plate number information groups, out
When having showed the license plate number information group of more than one identical most quantity, that is, there are multiple unrecognized fuzzy license plate numbers
Information unit, the fuzzy license plate number information unit by will be unable to identification are sent in database, read out from database
Main license plate number information associated by fuzzy license plate number information unit, and judge the presence between fuzzy license plate number unit
Common main license plate number information is simultaneously added in quantity statistics, is reached and is accurately and effectively identified final license plate number information i.e.
The purpose of the license plate number of vehicle.To avoid the influence due to parking lot environmental factor from adding the recognition performance of identification device not
There is mistake in license plate image information that is high and causing part to identify, so that the final license plate number information identified
There is error.
Computer installation embodiment:
The computer installation of the present embodiment include processor, memory and storage in memory and can be in processor
The computer program of upper operation, such as the computer processing for realizing above- mentioned information processing method.Processor executes meter
Each step of above-mentioned license plate number recognition methods is realized when calculation machine program.
For example, computer program can be divided into one or more modules, one or more module, which is stored in, is deposited
It in reservoir, and is executed by processor, to complete modules of the invention.One or more modules can be can complete it is specific
The series of computation machine program instruction section of function, the instruction segment is for describing execution of the computer program in terminal device
Journey.
It should be noted that terminal device can be desktop PC, notebook, palm PC and cloud server etc.
Calculate equipment.Terminal device may include, but be not limited only to, processor, memory.It will be understood by those skilled in the art that this hair
Bright schematic diagram is only the example of terminal device, does not constitute the restriction to terminal device, may include than illustrate it is more or
Less component perhaps combines certain components or different components, such as terminal device can also be set including input and output
Standby, network access equipment, bus etc..
Processor alleged by the present invention can be central processing unit (Central Processing Unit, CPU), may be used also
To be other general processors, digital signal processor (Digital Signal Processor, DSP), specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) either other programmable logic device, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor is also possible to any conventional processor
Deng processor is the control centre of terminal device, utilizes the various pieces of various interfaces and the entire terminal device of connection.
Memory can be used for storing computer program and/or module, and processor is stored in memory by operation or execution
Interior computer program and/or module, and the data being stored in memory are called, realize the various functions of terminal device.
Memory can mainly include storing program area and storage data area, wherein storing program area can storage program area, at least one
Application program needed for function (such as sound-playing function, image player function etc.) etc.；Storage data area can be stored according to hand
Machine uses created data (such as audio data, phone directory etc.) etc..In addition, memory may include high random access
Memory can also include nonvolatile memory, such as hard disk, memory, plug-in type hard disk, intelligent memory card (Smart
Media Card, SMC), secure digital (Secure Digital, SD) card, flash card (Flash Card), at least one disk
Memory device, flush memory device or other volatile solid-state parts.
Computer readable storage medium:
If the integrated module of terminal device be realized in the form of SFU software functional unit and as the sale of independent product or
In use, can store in a computer readable storage medium.Based on this understanding, the present invention realizes above-mentioned implementation
All or part of the process in example method, can also instruct relevant hardware to complete, the computer by computer program
Program can be stored in computer readable storage medium, and the computer program is when being executed by processor, it can be achieved that above-mentioned license plate
Each step of number identification method.
Wherein, computer program includes computer program code, and computer program code can be source code form, object
Code form, executable file or certain intermediate forms etc..Computer-readable medium may include: that can carry computer program
Any entity or device of code, recording medium, USB flash disk, mobile hard disk, magnetic disk, CD, computer storage, read-only memory
(ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, electricity
Believe signal and software distribution medium etc..It should be noted that the content that computer-readable medium includes can be managed according to the administration of justice
Local legislation and the requirement of patent practice carry out increase and decrease appropriate, such as in certain jurisdictions, according to legislation and patent
Practice, computer-readable medium does not include electric carrier signal and telecommunication signal.
It should be noted that the above is only a preferred embodiment of the present invention, but the design concept invented is not limited thereto,
All insubstantial modifications made using this design to the present invention, are also entered within protection scope of the present invention.
Claims (10)
1. a kind of recognition methods of license plate number characterized by comprising
Vision signal is obtained, after carrying out character recognition to frame license plate image signal each in the vision signal, forms multiple vehicles
Board number information, each frame license plate image signal are corresponding with the license plate number information；
The identical license plate number information is divided into same license plate number information group, to each license plate number information group
Carry out quantity statistics；
Judge whether occur the most license plate number information group of one group of quantity in the result of the quantity statistics, if so, by institute
Stating the most license plate number information group acknowledge of quantity is final license plate number information.
2. a kind of recognition methods of license plate number according to claim 1, it is characterised in that:
If, will be described to the license plate number information group for occurring two groups or more identical most quantity in the result of the quantity statistics
Each license plate number information parts Biao Ji not be fuzzy license plate number in the identical license plate number information group of two groups or more quantity
Each fuzzy license plate number information unit is respectively sent to database by information unit.
3. a kind of recognition methods of license plate number according to claim 2, it is characterised in that:
It is described each fuzzy license plate number information unit is respectively sent to database after, execute: from the database
Main license plate number information associated by each fuzzy license plate number information unit is read respectively, judges each fuzzy vehicle
With the presence or absence of unique common main license plate number information between trade mark code information unit.
4. a kind of recognition methods of license plate number according to claim 3, it is characterised in that:
If the common main license plate number information of existence anduniquess between each fuzzy license plate number information unit, by main license plate
Number information is added in the quantity statistics result with preset quantity and carries out quantity statistics again.
5. a kind of recognition methods of license plate number according to claim 4, it is characterised in that:
The license plate number information group to the identical most quantity of the main license plate number information and two groups or more quantity carries out
Again it after quantity statistics, executes: whether there is and the main license plate number information in the judgement result of quantity statistics again
Identical license plate number information group, license plate number information group identical with main license plate number information, then described will preset if it exists
Quantity is added to the license plate number information group identical with main license plate number information, in the result of the quantity statistics again
It is final license plate number information by the most license plate number information group acknowledge of one group of quantity.
6. a kind of recognition methods of license plate number according to claim 3, it is characterised in that:
If there is no unique common main license plate number information between each fuzzy license plate number information unit, sending is mentioned
Show information, license plate image signal described in multiframe corresponding to each fuzzy license plate number information unit is shown
Come, receive the final license plate number information of input, is the main vehicle by the final license plate number information flag for receiving input
After board number information, after each fuzzy license plate number information unit is associated with the main license plate number information respectively
Database is sent to be stored.
7. a kind of recognition methods of license plate number according to any one of claims 1 to 6, it is characterised in that:
The acquisition vision signal, comprising: obtain high definition video signal.
8. a kind of recognition methods of license plate number according to any one of claims 1 to 6, it is characterised in that:
The license plate number information group acknowledge that quantity is most is execution: by the final vehicle after final license plate number information
Board number information is shown.
9. computer installation, which is characterized in that including processor and memory, the memory is stored with computer program,
The license plate number recognition methods as described in any one of claim 1 to 8 is realized when the computer program is executed by processor
Each step.
10. computer readable storage medium is stored thereon with computer program, it is characterised in that: the computer program is located
Manage each step that the license plate number recognition methods as described in any one of claim 1 to 8 is realized when device executes.
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| CN111310698A (en) * | 2020-02-26 | 2020-06-19 | 北京停简单信息技术有限公司 | License plate recognition method and device and inspection vehicle |
| CN114038207A (en) * | 2021-11-03 | 2022-02-11 | 上海途虎信息技术有限公司 | Guest welcoming method, computer readable storage medium and device |
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