CN106652469B - A kind of vehicle marches into the arena, vehicle appearance licence plate recognition method and Vehicle License Plate Recognition System - Google Patents
A kind of vehicle marches into the arena, vehicle appearance licence plate recognition method and Vehicle License Plate Recognition System Download PDFInfo
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- CN106652469B CN106652469B CN201611167085.8A CN201611167085A CN106652469B CN 106652469 B CN106652469 B CN 106652469B CN 201611167085 A CN201611167085 A CN 201611167085A CN 106652469 B CN106652469 B CN 106652469B
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/017—Detecting movement of traffic to be counted or controlled identifying vehicles
- G08G1/0175—Detecting movement of traffic to be counted or controlled identifying vehicles by photographing vehicles, e.g. when violating traffic rules
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F18/00—Pattern recognition
- G06F18/20—Analysing
- G06F18/22—Matching criteria, e.g. proximity measures
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/20—Image preprocessing
- G06V10/22—Image preprocessing by selection of a specific region containing or referencing a pattern; Locating or processing of specific regions to guide the detection or recognition
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/30—Individual registration on entry or exit not involving the use of a pass
- G07C9/38—Individual registration on entry or exit not involving the use of a pass with central registration
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/60—Type of objects
- G06V20/62—Text, e.g. of license plates, overlay texts or captions on TV images
- G06V20/625—License plates
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
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- Bioinformatics & Cheminformatics (AREA)
- Artificial Intelligence (AREA)
- Bioinformatics & Computational Biology (AREA)
- Computer Vision & Pattern Recognition (AREA)
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- Traffic Control Systems (AREA)
Abstract
The invention discloses a kind of vehicles to march into the arena, vehicle appearance licence plate recognition method and Vehicle License Plate Recognition System, and wherein vehicle is marched into the arena licence plate recognition method, comprising: is identified for the first time to the license plate for vehicle of marching into the arena, obtains first license plate number identification information；Judge whether first license plate number identification information is identical as the license plate number in fixed vehicle list；If so, opening a sluice gate to let pass, otherwise, judge whether first license plate number identification information and the matching degree of the specific record in fixed vehicle list reach threshold value；If it is not, being determined as interim vehicle, open a sluice gate to let pass, if so, extracting the characteristic information of license plate area；Whether the matching degree of the characteristic information and the characteristic information prestored that judge license plate area reaches threshold value；If so, opening a sluice gate to let pass；If it is not, carrying out opening a sluice gate to let pass after being determined as interim vehicle and recording.It is combined by Car license recognition and the verifying of license plate area characteristic information, improves the traffic efficiency of fixed vehicle and special car.
Description
Technical field
The present invention relates to image procossing, Video Analysis Technology field, march into the arena more particularly to a kind of vehicle, vehicle pull-out vehicle
Board recognition methods and Vehicle License Plate Recognition System.
Background technique
Currently, with the continuous development of society, demand of the people to vehicle increases, the quantity of vehicle quickly increases
Add, needs to carry out registration management to vehicle.If the negligible amounts of vehicle, manually carrying out registration can also be dealt with, once disengaging vehicle
It is more, it using manually-operated method, both wasted time, and caused the reduction of disengaging efficiency, there may come a time when to occur due to vehicle
It is excessive, it not can be carried out quick registration, influence the disengaging efficiency of car owner, waste the plenty of time.
Therefore, Vehicle License Plate Recognition System is generally used.Normal car license recognition equipment has been widely used in parking lot, city
The regions such as road, highway carry out the automatic candid photograph and identification of number plate of vehicle.In the past, since the discrimination of license plate is not high,
Car owner passes in and out parking lot mainly or based on swiping the card, and Car license recognition is more used as the supplement of monthly card or temporary card or only uses
In perpetuation of testimony and identification information is uploaded to traffic police office.In the past few years, being constantly progressive with science and technology, Car license recognition
Technology is rapidly developed, the raising of the discrimination of license plate, and pure Car license recognition and unattended scheme is made to become feasible.
However conventionally, as the presence of various odjective causes, such as environment are partially dark, light filling measure is inappropriate,
Daytime direct sunlight etc..And license plate itself is there are breakage, the reasons such as is stained, leads to always have some vehicles that can not identify or know
It is not difficult.And the result of Car license recognition is the exclusive evidence as disengaging field at present, once license plate recognition result mistake, vehicle
With regard to impassable.
Summary of the invention
The object of the present invention is to provide a kind of vehicles to march into the arena, vehicle appearance licence plate recognition method and Vehicle License Plate Recognition System, mentions
The high traffic efficiency of vehicle.
In order to solve the above technical problems, marching into the arena licence plate recognition method the embodiment of the invention provides a kind of vehicle, comprising:
The license plate for vehicle of marching into the arena is identified for the first time, obtains the first license plate number identification information of the vehicle；
Judge whether the first license plate number identification information is identical as the license plate number in fixed vehicle list；
If so, carry out opening a sluice gate to let pass to the vehicle, otherwise, judge the first license plate number identification information with it is described solid
Whether the matching degree for determining the specific record in vehicle list reaches threshold value；
If it is not, then determining that the vehicle is interim vehicle, the vehicle is carried out opening a sluice gate to let pass, if so, extracting the vehicle
License plate area characteristic information；
The characteristic information of the license plate area of the vehicle is matched with the characteristic information prestored；
Judge whether the matching degree of the characteristic information and the characteristic information prestored of the license plate area of the vehicle reaches
Threshold value；
If so, opening a sluice gate to let pass to the vehicle；If it is not, after determining that the vehicle is interim vehicle and records, to described
Vehicle carries out opening a sluice gate to let pass；Further include:
The matching degree of the characteristic information of the license plate area of the vehicle and the characteristic information prestored reaches the threshold value
Matching degree after the license plate recognition result for modifying the vehicle, opens a sluice gate to let pass to the vehicle.
In addition to this, the embodiment of the invention also provides a kind of vehicle appearance licence plate recognition methods, comprising:
The license plate of appearance vehicle is identified for the first time, obtains the first license plate number identification information of the vehicle；
Judge whether the first license plate number identification information is identical as the license plate number in fixed vehicle list；
If so, carry out opening a sluice gate to let pass to the vehicle, otherwise, judge the first license plate number identification information with it is described solid
Whether the matching degree for determining the specific record in vehicle list reaches threshold value；
If it is not, then determining that the vehicle is interim vehicle, the vehicle is carried out opening a sluice gate to let pass, if so, extracting the vehicle
License plate area characteristic information；
The characteristic information of the license plate area of the vehicle is matched with the characteristic information prestored；
Judge whether the matching degree of the characteristic information and the characteristic information prestored of the license plate area of the vehicle reaches
Threshold value；
If so, opening a sluice gate to let pass to the vehicle；If it is not, after determining that the vehicle is interim vehicle and records, to described
Vehicle carries out opening a sluice gate to let pass.
Wherein, further includes:
The matching degree of specific record in the first license plate number identification information and the fixed vehicle list reaches threshold value, and
The matching degree of the characteristic information of the license plate area of the vehicle and the characteristic information prestored reaches the threshold value matching degree, repairs
After the license plate recognition result for changing the vehicle, the vehicle is opened a sluice gate to let pass.
Wherein, the first license plate number identification information and the matching degree of the specific record in the fixed vehicle list reach threshold
Value, and the characteristic information of the license plate area of the vehicle is not up to threshold value with the matching degree of the characteristic information prestored and matches
Degree carries out opening a sluice gate to let pass after determining that the vehicle is interim vehicle and records to the vehicle, further includes:
It searches temporary card to march into the arena record, judges whether the vehicle has identical record of marching into the arena；
If so, opening a sluice gate to let pass to the vehicle, if it is not, then carrying out manually opening a sluice gate to let pass to the vehicle.
Wherein, the first license plate number identification information and the matching degree of the specific record in the fixed vehicle list are not up to
Threshold value determines that the vehicle is interim vehicle, carries out opening a sluice gate to let pass to the vehicle, comprising:
It searches the temporary card to be recorded, and judges whether the vehicle has identical record of marching into the arena；
If so, opening a sluice gate to let pass for the vehicle.
Wherein, the first license plate number identification information and the matching degree of the specific record in the fixed vehicle list are not up to
Threshold value, and the vehicle is also without identical record of marching into the arena, comprising:
The characteristic information of the license plate area of the vehicle is extracted, and is matched with the characteristic information prestored；
Judge whether the matching degree of the characteristic information and the characteristic information prestored of the license plate area of the vehicle reaches
The threshold value matching degree；
If so, modifying the license plate recognition result of the vehicle and opening a sluice gate to let pass to the vehicle, if it is not, then to the vehicle
It is manually let pass.
In addition to this, the embodiment of the invention also provides a kind of Vehicle License Plate Recognition Systems, comprising:
License plate acquisition module, the license plate acquisition module are used to carry out information collection to the vehicle marched into the arena, and obtain just train
Trade mark identification information；
Memory module, the memory module are used to store the temporary card of the license plate number of fixed vehicle list and interim vehicle
Record march into the arena as archives, and store the fixed vehicle list and the temporary card march into the arena vehicle license plate area feature letter
Breath；
Collection apparatus module, the collection apparatus module are used to acquire the characteristic information of the license plate area of the vehicle；
Matching module, the matching module and the license plate acquisition module, the memory module, the collection apparatus module
Connection, for in the first license plate number identification information and the memory module fixation vehicle list and temporary card march into the arena vehicle
License plate number matched, export matching result, or by the collection apparatus module acquisition the vehicle license plate area
The fixed vehicle list and the temporary card of the characteristic information in domain and memory module storage are marched into the arena the license plate area of vehicle
The characteristic information in domain is matched, and matching result is exported；
Control module, the control module are connect with the matching module, in the first license plate number identification information
With in the memory module fixation vehicle list and temporary card march into the arena vehicle license plate number matching degree reach threshold value after, open
Gate simultaneously lets pass to the vehicle, otherwise, controls the matching module to the characteristic information of the license plate area of the vehicle
With the characteristic information progress of the license plate area of the fixed vehicle list and interim vehicle of memory module storage
Match, if matching degree reaches threshold value, open gate and let pass to the vehicle, otherwise, records the license plate letter of the vehicle
It carries out manually opening a sluice gate to let pass after breath.
It wherein, further include the modified module being connect with the control module, the modified module is used in the vehicle
The license plate area of the fixed vehicle list and the interim vehicle of the characteristic information of license plate area and memory module storage
After the matching degree of the characteristic information in domain reaches after threshold value matching degree or the vehicle has identical record of marching into the arena, license plate is modified
Recognition result.
Vehicle provided by the embodiment of the present invention marches into the arena, vehicle appearance licence plate recognition method and Vehicle License Plate Recognition System, and existing
There is technology to compare, has the advantage that
Vehicle provided in an embodiment of the present invention is marched into the arena licence plate recognition method, comprising:
The license plate marched into the arena is identified for the first time, obtains the first license plate number identification information of the vehicle；
Judge whether the first license plate number identification information is identical as the license plate number in fixed vehicle list；
If so, carry out opening a sluice gate to let pass to the vehicle, otherwise, judge the first license plate number identification information with it is described solid
Whether the matching degree for determining the specific record in vehicle list reaches threshold value；
If it is not, then determining that the vehicle is interim vehicle, the vehicle is carried out opening a sluice gate to let pass, if so, extracting the vehicle
License plate area characteristic information；
The characteristic information of the license plate area of the vehicle is matched with the characteristic information prestored；
Judge whether the matching degree of the characteristic information and the characteristic information prestored of the license plate area of the vehicle reaches
Threshold value；
If so, opening a sluice gate to let pass to the vehicle；If it is not, after determining that the vehicle is interim vehicle and records, to described
Vehicle carries out opening a sluice gate to let pass.
Vehicle appearance licence plate recognition method provided in an embodiment of the present invention, comprising:
The license plate to be appeared on the scene is identified for the first time, obtains the first license plate number identification information of the vehicle；
Judge whether the first license plate number identification information is identical as the license plate number in fixed vehicle list；
If so, carry out opening a sluice gate to let pass to the vehicle, otherwise, judge the first license plate number identification information with it is described solid
Whether the matching degree for determining the specific record in vehicle list reaches threshold value；
If it is not, then determining that the vehicle is interim vehicle, the vehicle is carried out opening a sluice gate to let pass, if so, extracting the vehicle
License plate area characteristic information；
The characteristic information of the license plate area of the vehicle is matched with the characteristic information prestored；
Judge whether the matching degree of the characteristic information and the characteristic information prestored of the license plate area of the vehicle reaches
Threshold value；
If so, opening a sluice gate to let pass to the vehicle；If it is not, after determining that the vehicle is interim vehicle and records, to described
Vehicle carries out opening a sluice gate to let pass.
Vehicle License Plate Recognition System provided in an embodiment of the present invention, comprising:
License plate acquisition module, the license plate acquisition module are used to carry out information collection to the vehicle marched into the arena, and obtain just train
Trade mark identification information；
Memory module, the memory module are used to store the temporary card of the license plate number of fixed vehicle list and interim vehicle
Record march into the arena as archives, and store the fixed vehicle list and the temporary card march into the arena vehicle license plate area feature letter
Breath；
Collection apparatus module, the collection apparatus module are used to acquire the characteristic information of the license plate area of the vehicle；
Matching module, the matching module and the license plate acquisition module, the memory module, the collection apparatus module
Connection, for in the first license plate number identification information and the memory module fixation vehicle list and temporary card march into the arena vehicle
License plate number matched, export matching result, or by the collection apparatus module acquisition the vehicle license plate area
The fixed vehicle list and the temporary card of the characteristic information in domain and memory module storage are marched into the arena the license plate area of vehicle
The characteristic information in domain is matched, and matching result is exported；
Control module, the control module are connect with the matching module, in the first license plate number identification information
With in the memory module fixation vehicle list and temporary card march into the arena vehicle license plate number matching degree reach threshold value after, open
Gate simultaneously lets pass to the vehicle, otherwise, controls the matching module to the characteristic information of the license plate area of the vehicle
It is matched with the license plate area feature of memory module storage, if matching degree reaches threshold value, opens gate and to described
Vehicle is let pass, and otherwise, carries out manually opening a sluice gate to let pass after recording the license board information of the vehicle.
The vehicle marches into the arena, vehicle appearance licence plate recognition method and Vehicle License Plate Recognition System, by by Car license recognition and license plate
Area characteristic information verifying combines, so that directly letting pass in the correct situation of first Car license recognition, if first identification knot
Fruit is incorrect, by extracting the feature of license plate area, determines whether let pass to the area validation of license plate to the vehicle, mentions
The high traffic efficiency of fixed vehicle and special car.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 be vehicle provided in an embodiment of the present invention march into the arena licence plate recognition method a kind of specific embodiment the step of stream
Journey；
Fig. 2 be vehicle provided in an embodiment of the present invention march into the arena licence plate recognition method another specific embodiment the step of
Process；
The step of Fig. 3 is a kind of specific embodiment of vehicle appearance licence plate recognition method provided in an embodiment of the present invention is flowed
Journey；
The step of Fig. 4 is another specific embodiment of vehicle appearance licence plate recognition method provided in an embodiment of the present invention
Process；
Fig. 5 is a kind of structural schematic diagram of specific embodiment of Vehicle License Plate Recognition System provided in an embodiment of the present invention；
Fig. 6 is the structural schematic diagram of another specific embodiment of Vehicle License Plate Recognition System provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, technical solution in the embodiment of the present invention carry out it is clear,
It is fully described by, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all
Other embodiments shall fall within the protection scope of the present invention.
Please refer to Fig. 1 and Fig. 2, Fig. 1 be vehicle provided in an embodiment of the present invention march into the arena licence plate recognition method one kind it is specific
The step process of embodiment；Fig. 2 be vehicle provided in an embodiment of the present invention march into the arena licence plate recognition method another kind it is specific real
Apply the step process of mode.
In a specific embodiment, the vehicle is marched into the arena licence plate recognition method, comprising:
Step 101, the license plate marched into the arena is identified for the first time, obtains the first license plate number identification information of the vehicle；
Step 102, judge whether the first license plate number identification information is identical as the license plate number in fixed vehicle list；
If so, step 103, carries out opening a sluice gate to let pass to the vehicle, otherwise, step 104, the first license plate number is judged
Whether the matching degree of the specific record in identification information and the fixed vehicle list reaches threshold value；
If it is not, then step 105, determines that the vehicle is interim vehicle, carries out opening a sluice gate to let pass to the vehicle, if so, step
Rapid 106, extract the characteristic information of the license plate area of the vehicle；
Step 107, the characteristic information of the license plate area of the vehicle is matched with the characteristic information prestored；
Step 108, judge the characteristic information of the license plate area of the vehicle and the matching degree of the characteristic information prestored
Whether threshold value is reached；
If so, going to step 103, the vehicle is opened a sluice gate to let pass；If it is not, going to step 105, determine that the vehicle is interim
After vehicle and record, the vehicle is carried out opening a sluice gate to let pass.
By combining Car license recognition and vehicle license plate characteristic Information Authentication, so that in the correct situation of first Car license recognition
It directly lets pass, if first recognition result is incorrect, by extracting the feature of license plate, the area validation of license plate is determined to this
Whether vehicle lets pass, and improves the traffic efficiency of fixed vehicle and special car.
After Car license recognition is correct, to improve later to the recognition efficiency for changing license plate, recognition speed and accuracy are improved, also
Include:
The matching degree of the characteristic information and the characteristic information prestored of the first license plate number identification information of the vehicle reaches
To the threshold value matching degree, step 109, after the license plate recognition result for modifying the vehicle, the vehicle is opened a sluice gate to let pass.
Herein, vehicle license plate characteristic extraction is exactly the provincial characteristics for extracting vehicle vehicle, as the color of license plate, license plate have confirmed that portion
The dossier for being allocated as being characterized in the fixation vehicle register with existing storage compares, if fruit matching reaches scheduled matching
Degree, then explanation is recorded vehicle, can be let pass.
Here fixed vehicle refers to the moon truck in cell or commercial center, and often to enter and leave the region certain
Interim vehicle, such as express delivery vehicle, post office vehicle etc..These vehicles in the region due to often entering and leaving, if in these vehicles
Certain vehicles there is a problem of that identification is difficult, property side can also be added these vehicles in fixed vehicle, as special car
Processing.The disengaging field strategy of monthly card can be used in these vehicles, but disengaging every time is needed statistical time and will individually to charge.
For example, certain license plate number has had been acknowledged most positions therein, and only one cannot be true in certain identification
Recognize, so that it may by area validation, carry out archives comparison, fixation vehicle list in it is really on the books, color of license plate etc. its
That notes down in its some feature and archives is consistent completely, illustrates that the license plate often enters and leaves, and can open a sluice gate to let pass.
After Car license recognition is correct, to improve later to the recognition efficiency for changing license plate, recognition speed and accuracy, institute are improved
State licence plate recognition method further include:
The matching degree of the characteristic information of the license plate area of the vehicle and the characteristic information prestored reaches the threshold value
Step 109 matching degree modifies the license plate recognition result of the vehicle.
In addition to this, the embodiment of the invention also provides a kind of vehicle appearance licence plate recognition methods, as shown in Figure 3 and Figure 4,
Include:
Step 201, the license plate of appearance vehicle is identified for the first time, obtains the first license plate number identification letter of the vehicle
Breath；
Step 202, judge whether the first license plate number identification information is identical as the license plate number in fixed vehicle list；
If so, step 203, carries out opening a sluice gate to let pass to the vehicle, otherwise, step 204, the first license plate number is judged
Whether the matching degree of the specific record in identification information and the fixed vehicle list reaches threshold value；
If it is not, then step 205, determines that the vehicle is interim vehicle, carries out opening a sluice gate to let pass to the vehicle, if so, step
Rapid 206, extract the characteristic information of the license plate area of the vehicle；
Step 207, the characteristic information of the license plate area of the vehicle is matched with the characteristic information prestored；
Step 208, judge the characteristic information of the license plate area of the vehicle and the matching degree of the characteristic information prestored
Whether threshold value is reached；
If it is not, step 209 carries out opening a sluice gate to let pass after determining that the vehicle is interim vehicle and records to the vehicle, if
It is step 210, to open a sluice gate to let pass to the vehicle.
By combining Car license recognition and vehicle license plate characteristic Information Authentication, so that in the correct situation of first Car license recognition
It directly lets pass, if first recognition result is incorrect, by extracting the feature of license plate, the area validation of license plate is determined to this
Whether vehicle lets pass, and improves the traffic efficiency of fixed vehicle and special car.
After Car license recognition is correct, to improve later to the recognition efficiency for changing license plate, recognition speed and accuracy is improved, is disappeared
Except appearance vehicle parking information that may be present, repetition charging, the step 210 are avoided, comprising:
After the license plate recognition result for modifying the vehicle, the vehicle is opened a sluice gate to let pass.
Wherein, the first license plate number identification information and the matching degree of the specific record in the fixed vehicle list are not up to
Threshold value determines that the vehicle is interim vehicle, carries out opening a sluice gate to let pass to the vehicle, comprising:
Step 2051, it searches the temporary card to be recorded, and judges whether the vehicle has identical record of marching into the arena；
If so, step 2052, opens a sluice gate to let pass for the vehicle.
Wherein, the first license plate number identification information and the matching degree of the specific record in the fixed vehicle list reach threshold
Value, and the characteristic information of the license plate area of the vehicle is not up to threshold value with the matching degree of the characteristic information prestored and matches
Degree carries out opening a sluice gate to let pass after determining that the vehicle is interim vehicle and records to the vehicle, further includes:
Step 2091, it searches temporary card to march into the arena record, judges whether the vehicle has identical record of marching into the arena；
If so, going to step 2052, the vehicle is opened a sluice gate to let pass, if it is not, then step 2092, carries out people to the vehicle
Work opens a sluice gate to let pass.
For having determined it is interim vehicle, check whether it has record of temporarily marching into the arena, if it had been registered for, if
It finds identical temporary card to march into the arena record, directly let pass.As long as being there are complete temporary card in and out records here, illustrate Car license recognition
It is correctly, not need modification license plate recognition result.For example, monthly card has the Guangdong B12345 an of Toyota, scene has just come one
The Guangdong B12346 of Audi, marches into the arena and is identified as Guangdong B12346.Also it is identified as Guangdong B12346 when appearance, meets phase first
Reach threshold value like degree, matching is unsatisfactory for threshold value after then extracting feature, but has found identical record of marching into the arena again, then this is just
It is the temporary card disengaging field flow journey of very standard, directly lets pass.
The matching degree of specific record in the first license plate number identification information and the fixed vehicle list is not up to threshold value,
And the vehicle is also without identical record of marching into the arena, comprising:
Step 2053, the characteristic information of the license plate area of the vehicle is extracted, and is carried out with the characteristic information prestored
Matching；
Step 2054, judge the characteristic information of the license plate area of the vehicle and the matching degree of the characteristic information prestored
Whether the threshold value matching degree is reached；
If so, turning the step 210, modifies the license plate recognition result of the vehicle and the vehicle is opened a sluice gate to let pass, if
It is no, then 2092 are gone to step, is manually let pass to the vehicle.
The first Car license recognition information of vehicle and the matching degree of the specific record in fixed vehicle list do not reach threshold value, but
It is that the characteristic information of the license plate area of vehicle and the matching degree of the characteristic information prestored reach the threshold value matching degree, license plate
First identification conflicts with license plate area characteristic matching, it is clear that and it is once deterministic process generation mistake, and license plate area
Feature spy is extremely low with the probability that mistake occurs, and illustrates that mistake occurs in first license plate number identification process, which should deposit
The record being in fixed vehicle list, it should grant and let pass.
And threshold value, the spy of license plate area are not reached for the matching degree both not with the specific record in fixed vehicle list
Reference breath reaches the vehicle of the threshold value matching degree with the matching degree of the characteristic information prestored, illustrates that the vehicle is first logical
The difficulty for crossing the inspection critical point or the Car license recognition of the vehicle is high, needs manually to release upon registration.
In vehicle appearance licence plate recognition method, first by identifying for the first time, the first license plate number for obtaining vehicle license plate is known
Other information judges whether it is a certain license plate in fixed vehicle list, if it is, illustrating to identify successfully, which is also registration
Cross the vehicle of license plate.Otherwise, illustrate that the identification of fixed vehicle has been likely to occur mistake, or what is come is interim vehicle, then judgement is first
Whether the matching degree of the specific record in secondary license plate number identification information and the fixed vehicle list reaches threshold value, and time license plate is known as before
5 or 6 in other information it is identical as 5 or 6 in 7 license board informations of the specific record of fixed vehicle list (can
Voluntarily it is determined by user), illustrate during removing this Car license recognition, there are several identification mistakes.If the first license plate number is known
The matching degree of specific record in other information and the fixed vehicle list reaches threshold value, illustrates that the license plate may be in fixed vehicle list
Record in, otherwise, when vehicle interim vehicle.
If the license plate may can't determine in the record of fixed vehicle list, at this moment need to carry out vehicle to the license plate
Board Region Feature Extraction, such as obtain the color of license plate, in the color etc. of license plate number, with the record of the fixation vehicle list prestored
The license plate area feature for the license plate number matched is matched.If matching reaches threshold value, i.e. one of them in license plate area feature
Or multinomial successful match, such as license plate color is identical, at this moment just illustrates that the license plate is the license plate in the record of fixed vehicle list, so
After can modify license plate recognition result, will initially have not been able to identification Car license recognition.If with the fixation vehicle list that prestores
The license plate area characteristic matching of matched license plate number is unsuccessful in record, and explanation is interim vehicle.
And for being determined as interim vehicle, checking whether that temporary card is recorded, i.e. the vehicle of the license plate number
Whether once marched into the arena, and marched into the arena if had occurred and that, open a sluice gate to let pass.Otherwise, feature is carried out to the license plate area of the vehicle
Extract, matched with the license plate area feature of matched license plate number in the record of the fixation vehicle list prestored, if matching at
Function illustrates during first Car license recognition, produces biggish mistake, can be mentioned in this way by subsequent license plate area feature
It takes and license plate area characteristic matching, obtains correct license plate recognition result, then by modification license plate recognition result, so that
Vehicle normally identifies and passes through, and avoids and judges by accident in first identification, unrecognized situation improves the effect of identification
Rate reduces the possibility made mistakes.It is verified by Car license recognition and license plate area, improves Car license recognition efficiency, solved
The difficult problem of identification.
In addition to this, the embodiment of the invention also provides a kind of Vehicle License Plate Recognition Systems, as shown in Figure 5 and Figure 6, comprising:
License plate acquisition module 10, the license plate acquisition module 10 are used to carry out information collection to the vehicle marched into the arena, obtain just
Secondary license plate number identification information；
Memory module 20, the memory module 20 are used to store the license plate number conduct of fixed vehicle list and interim vehicle
Archives, and store the characteristic information of the license plate area of the fixed vehicle list and the interim vehicle；
Collection apparatus module 30, the collection apparatus module 30 are used to acquire the feature letter of the license plate area of the vehicle
Breath；
Matching module 40, the matching module 40 and the license plate acquisition module 10, the memory module 20, the feature
Acquisition module 30 connects, for in the first license plate number identification information and the memory module 20 fixation vehicle list and
The license plate number of interim vehicle is matched, and matching result, or the vehicle that the collection apparatus module 30 is acquired are exported
The characteristic information of license plate area matched with the license plate area feature that the memory module 20 stores, export matching result；
Control module 50, the control module 50 are connect with the matching module 40, for knowing in the first license plate number
After the license plate number matching degree of fixation vehicle list and interim vehicle in other information and the memory module 20 reaches threshold value, beat
Throttle valve lets pass to the vehicle, otherwise, controls the matching module 40 and believes the feature of the license plate area of the vehicle
It ceases the license plate area feature stored with the memory module 20 to be matched, opens gate if matching and the vehicle is put
Row otherwise, it is determined that the vehicle is interim vehicle, and carries out manually opening a sluice gate to let pass after recording the license board information of the vehicle.
The mode combined is verified with license plate area by using license plate number identification, removes in this identification process, fails in license plate
When identification, verifies and matched with whether the license plate number recorded in fixed vehicle list reaches, i.e., identified in first Car license recognition information
It is that the number of predetermined figure or more is identical as the license plate number in fixed vehicle list by having in license plate number, for example, first license plate is known
Not in obtain license plate number in have 6 with fixation vehicle list in a license plate number in 6 it is identical, be at this moment possible to be
It is not identified completely in first identification, needs to verify the vehicle that can just judge whether it is in fixed vehicle list by license plate area
?.Certainly, it verifies and whether reaches matched threshold value with the license plate number recorded in fixed vehicle list by user oneself setting.
It subsequently through license plate area collection apparatus, compares with the characteristic information prestored, is reached if matched in comparison process
To threshold value, illustrate that the vehicle is the vehicle in fixed vehicle list.
It is matched if the license plate number recorded in verifying early period and fixed vehicle list does not reach, and the license plate area in later period is special
Sign matching reaches threshold value, during the first Car license recognition for illustrating early period, gross mistake occurs, which is in fixed vehicle list
Vehicle, can be improved the recognition efficiency and ability to the license plate of vehicle in this way, lower the probability of identification mistake.
Since vehicle will do it billing operation mostly after marching into the arena, either marches into the arena or appear on the scene, it is necessary to vehicle
Information is strictly managed, and the license plate number information for the vehicle being registered for cannot be wrong, and therefore, the Vehicle License Plate Recognition System is also
Including the modified module 60 connecting with the control module 50, the modified module 60 is for the license plate area in the vehicle
The feature of the license plate area of the fixed vehicle list and the interim vehicle of characteristic information and the memory module 20 storage
After the matching degree of information does not reach threshold value matching degree, license plate recognition result is modified.
In the present invention, the convolutional neural networks of the feature of a general extraction license plate area, institute can be trained in advance
The size of the feature and region that need is by user's designed, designed.And the network is stored in headend equipment.Equipment uses initial stage,
After obtaining license plate recognition result, mentioned using the feature that vehicle of the convolutional neural networks to disengaging field carries out license plate area
It takes, and feature is saved as the discrepancy validating documents of fixed vehicle.After feature is collected, field is passed in and out in registered fixation vehicle every time
When, when Car license recognition error when, so that it may using convolutional neural networks to disengaging field vehicle license plate area into
Then row feature extraction is matched and is verified with the characteristic kept.Using convolutional neural networks to the vehicle of disengaging field
License plate area carry out feature extraction and matched process and can be carried out in headend equipment, in this way can be to avoid using rear end
Vehicle authentication server.
License plate area feature extraction in the present invention is using a trained convolutional neural networks.The instruction of the network
It is as follows to practice process:
1, in different weather, the parking lot entrance of different regions collects the largely vehicle under different light conditions
The image of disengaging；
2, the image of artificial screening a variety of models, various vehicle colors, various angles and various illumination；
3, the position that the license plate in every image is navigated to using Car license recognition program is carried out outer by the specific size of license plate
Expand, determines license plate area, and be labeled to license plate area；
4, the convolutional neural networks structure of a suitable field application is designed；
5, the sample training depth convolutional network obtained using step 3, obtains each layer of network weight.
In one embodiment, live license plate area feature acquisition and maintenance process:
(1), before equipment factory, the above-mentioned convolutional neural networks after training are loaded；
(2), after equipment is installed at the scene, fixed vehicle information list is loaded in headend equipment；
(3), it (is matched with fixed vehicle information table Ji Wei fixed vehicle) when fixed vehicle passes in and out field, uses car license recognition equipment
Shoot the image of multiple vehicles；
(4), for the vehicle of identification difficulty and easy error, it is desirable that car owner's cooperation is taken pictures and uploading pictures.
1), for each vehicle, after being collected into a certain number of pictures, in the license plate area of idle starting headend equipment
Abstraction function, each car can extract the feature of the license plate area of one group of vehicle.These features remain on headend equipment
In；
2), after the fixed vehicle at scene, which is basically completed license plate area feature, collects, system can enable at once.It used
Cheng Zhong can require car owner's cooperation to take pictures again, so if it find that the license plate area recognition effect of the vehicle of certain car owners is poor
After reuse convolutional network extract feature.When certain fixed vehicle no longer the region occur, delete operation can be executed, delete
The license plate area characteristic information of the vehicle.
In one embodiment, the matching process of field vehicle:
1, the Car license recognition of single frames or video flowing can be used in the process of field vehicle disengaging, either using single frames or
The recognition methods of person's video flowing all retains a clearly vehicle image.
2, once the problem of scene identifies, needs to carry out license plate area verifying, just according to the position of License Plate, mention
License plate area is taken, the extraction of the feature of license plate area is carried out using depth convolutional network.
3, the license plate area feature that step 2 is extracted is matched with the information of preservation, finds most like result.Judgement
Whether the result has reached threshold value, if having reached threshold value, exports corresponding license plate number, otherwise returns to no matched knot
Fruit.
It should be pointed out that in the present invention, license plate area is the region comprising license plate, practical is not only license plate
That pocket, further comprises the vehicle body of part, i.e. license plate area feature is in addition to license plate color, license plate number color, also
The exhaust grid of partial automobile, bonnet information etc..Feature comprising license plate itself, such as certain parts against wear of license plate, have
It is stained.In addition for certain similar characters, such as 0 and D, Car license recognition is possible to identify mistake, but in license plate area
It is verified again, so that it may solve the problems, such as these similar characters identification mistake
In conclusion vehicle provided in an embodiment of the present invention is marched into the arena, vehicle appearance licence plate recognition method and Car license recognition system
System, by combining Car license recognition and vehicle license plate characteristic Information Authentication, so that in the correct situation of first Car license recognition directly
It lets pass, if first recognition result is incorrect, by extracting the feature of license plate, is determined by the area validation to license plate to this
Whether vehicle lets pass, and improves the traffic efficiency of fixed vehicle and special car.
It marches into the arena above to vehicle provided by the present invention, vehicle appearance licence plate recognition method and Vehicle License Plate Recognition System carry out
It is discussed in detail.Used herein a specific example illustrates the principle and implementation of the invention, above embodiments
Illustrate to be merely used to help understand method and its core concept of the invention.It should be pointed out that for the common skill of the art
, without departing from the principle of the present invention, can be with several improvements and modifications are made to the present invention for art personnel, these change
It is also fallen within the protection scope of the claims of the present invention into modification.
Claims (7)
- The licence plate recognition method 1. a kind of vehicle is marched into the arena characterized by comprisingThe license plate for vehicle of marching into the arena is identified for the first time, obtains the first license plate number identification information of the vehicle；Judge whether the first license plate number identification information is identical as the license plate number in fixed vehicle list；If so, carrying out opening a sluice gate to let pass to the vehicle, otherwise, the first license plate number identification information and the fixed vehicle are judged Whether the matching degree of the specific record in list reaches threshold value；If it is not, then determining that the vehicle is interim vehicle, the vehicle is carried out opening a sluice gate to let pass, if so, extracting the vehicle The characteristic information of license plate area；The characteristic information of the license plate area of the vehicle is matched with the characteristic information prestored；Whether the matching degree of the characteristic information and the characteristic information prestored that judge the license plate area of the vehicle reaches threshold value；If so, opening a sluice gate to let pass to the vehicle；If it is not, after determining that the vehicle is interim vehicle and records, to the vehicle It carries out opening a sluice gate to let pass, further includes:The characteristic information of the license plate area of the vehicle reaches the threshold value with the matching degree of the characteristic information prestored and matches It spends, after the license plate recognition result for modifying the vehicle, the vehicle is opened a sluice gate to let pass.
- 2. a kind of vehicle appearance licence plate recognition method characterized by comprisingThe license plate of the vehicle of appearance is identified for the first time, obtains the first license plate number identification information of the vehicle；Judge whether the first license plate number identification information is identical as the license plate number in fixed vehicle list；If so, carrying out opening a sluice gate to let pass to the vehicle, otherwise, the first license plate number identification information and the fixed vehicle are judged Whether the matching degree of the specific record in list reaches threshold value；If it is not, then determining that the vehicle is interim vehicle, the vehicle is carried out opening a sluice gate to let pass, if so, extracting the vehicle The characteristic information of license plate area；The characteristic information of the license plate area of the vehicle is matched with the characteristic information prestored；Whether the matching degree of the characteristic information and the characteristic information prestored that judge the license plate area of the vehicle reaches threshold value；If so, opening a sluice gate to let pass to the vehicle；If it is not, after determining that the vehicle is interim vehicle and records, to the vehicle It carries out opening a sluice gate to let pass, further includes:The matching degree of specific record in the first license plate number identification information and the fixed vehicle list reaches threshold value, and described The matching degree of the characteristic information of the license plate area of vehicle and the characteristic information prestored reaches the threshold value matching degree, modifies institute After the license plate recognition result for stating vehicle, the vehicle is opened a sluice gate to let pass.
- 3. vehicle appearance licence plate recognition method as claimed in claim 2, which is characterized in that the first license plate number identification information Reach threshold value with the matching degree of the specific record in the fixed vehicle list, and the characteristic information of the license plate area of the vehicle with The matching degree of the characteristic information prestored is not up to threshold value matching degree, right after determining that the vehicle is interim vehicle and records The vehicle carries out opening a sluice gate to let pass, further includes:It searches temporary card to march into the arena record, judges whether the vehicle has identical record of marching into the arena；If so, opening a sluice gate to let pass to the vehicle, if it is not, then carrying out manually opening a sluice gate to let pass to the vehicle.
- 4. vehicle appearance licence plate recognition method as claimed in claim 3, which is characterized in that the first license plate number identification information It is not up to threshold value with the matching degree of the specific record in the fixed vehicle list, determines that the vehicle is interim vehicle, to described Vehicle carries out opening a sluice gate to let pass, comprising:It searches the temporary card to be recorded, and judges whether the vehicle has identical record of marching into the arena；If so, opening a sluice gate to let pass for the vehicle.
- 5. vehicle appearance licence plate recognition method as claimed in claim 4, which is characterized in that the first license plate number identification information Threshold value is not up to the matching degree of the specific record in the fixed vehicle list, and the vehicle is also without identical record of marching into the arena, Include:The characteristic information of the license plate area of the vehicle is extracted, and is matched with the characteristic information prestored；Whether the matching degree of the characteristic information and the characteristic information prestored that judge the license plate area of the vehicle reaches described Threshold value matching degree；If so, modify the license plate recognition result of the vehicle and open a sluice gate to let pass to the vehicle, if it is not, then to the vehicle into Pedestrian's work is let pass.
- 6. a kind of Vehicle License Plate Recognition System characterized by comprisingLicense plate acquisition module, the license plate acquisition module are used to carry out information collection to the vehicle marched into the arena, and obtain first license plate number Identification information；The temporary card of memory module, the license plate number that the memory module is used to store fixed vehicle list and interim vehicle is marched into the arena Record is used as archives, and store the fixed vehicle list and the temporary card march into the arena vehicle license plate area characteristic information；Collection apparatus module, the collection apparatus module are used to acquire the characteristic information of the license plate area of the vehicle；Matching module, the matching module and the license plate acquisition module, the memory module, the collection apparatus module connect Connect, for in the first license plate number identification information and the memory module fixation vehicle list and temporary card march into the arena vehicle License plate number matched, export matching result, or by the collection apparatus module acquisition the vehicle license plate area Characteristic information and memory module storage the fixed vehicle list and the temporary card march into the arena the license plate area of vehicle Characteristic information matched, export matching result；Control module, the control module are connect with the matching module, in the first license plate number identification information and institute State fixation vehicle list and temporary card in memory module march into the arena vehicle license plate number matching degree reach threshold value after, open gate And let pass to the vehicle, otherwise, the matching module is controlled to the characteristic information of the license plate area of the vehicle and institute The characteristic information for stating the fixed vehicle list of memory module storage and the license plate area of the interim vehicle is matched, if Matching degree reaches threshold value, then opens gate and let pass to the vehicle, otherwise, the license board information for recording the vehicle is laggard Pedestrian's work opens a sluice gate to let pass.
- 7. Vehicle License Plate Recognition System as claimed in claim 6, which is characterized in that further include the modification being connect with the control module Module, the modified module are used to store in the characteristic information of the license plate area of the vehicle with the memory module described solid The matching degree for determining the characteristic information of the license plate area of Che Mingdan and the interim vehicle reaches after threshold value matching degree or the vehicle Have identical record of marching into the arena after, modify license plate recognition result.
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| CN107240176A (en) * | 2017-05-31 | 2017-10-10 | 合肥亿迈杰软件有限公司 | A kind of district vehicles turnover management method of feature based identification |
| CN107146062A (en) * | 2017-05-31 | 2017-09-08 | 合肥亿迈杰软件有限公司 | A kind of logistics vehicles turnover community's control system based on big data |
| CN111028368A (en) * | 2017-06-08 | 2020-04-17 | 西安艾润物联网技术服务有限责任公司 | Intelligent parking system departure charging method, system and storage medium |
| CN109584389A (en) * | 2018-11-29 | 2019-04-05 | 上海振华重工(集团)股份有限公司 | A kind of management method in garage parking, device, system and computer storage medium |
| CN110110676A (en) * | 2019-05-13 | 2019-08-09 | 深圳市万物云科技有限公司 | Automatic error correction method and device based on Car license recognition |
| CN112712626A (en) * | 2019-10-24 | 2021-04-27 | 上海际链网络科技有限公司 | Vehicle verification method and device based on license plate information, computer equipment and storage medium |
| CN113011540A (en) * | 2021-03-01 | 2021-06-22 | 北京骑胜科技有限公司 | Identification method, device, readable storage medium and electronic equipment |
| CN113240913A (en) * | 2021-06-16 | 2021-08-10 | 北京筑梦园科技有限公司 | Unidentified vehicle management method and device and parking management system |
| CN113327337A (en) * | 2021-06-21 | 2021-08-31 | 深圳腾达智能科技有限公司 | Method for ensuring normal payment and departure of vehicle |
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