CN108021915A - The anti-detection method of license plate blocked - Google Patents
The anti-detection method of license plate blocked Download PDFInfo
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- CN108021915A CN108021915A CN201711423913.4A CN201711423913A CN108021915A CN 108021915 A CN108021915 A CN 108021915A CN 201711423913 A CN201711423913 A CN 201711423913A CN 108021915 A CN108021915 A CN 108021915A
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- vehicle
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- plate
- wiper mechanism
- car
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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
- G06V20/63—Scene text, e.g. street names
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Traffic Control Systems (AREA)
Abstract
The present invention relates to technical field of control over intelligent traffic, provide a kind of anti-detection method of license plate blocked, by clearing up in time the car plate being blocked, reach the anti-of car plate and block purpose, so as to improve accuracy of the Vehicle License Plate Recognition System to Car license recognition, including herein below, before being identified to the number-plate number, the cleaning process to car plate is further included：A, the sensing step of the induction module in road：The sensing unit that vehicle is triggered during travelling in induction module sends inductive signal into processing module；B, the verification step of processing module：After processing module receives inductive signal, processing module sends control signal to wiper mechanism corresponding with the sensing unit；C, the cleaning step of the wiper mechanism of road side：The wiper mechanism for receiving control signal cleans the car plate of the vehicle, and the debris on car plate is rinsed out, and vehicle continues to travel, and the vehicle snapshot module in front captures the vehicle.
Description
Technical field
The present invention relates to technical field of control over intelligent traffic, is specially a kind of anti-detection method of license plate blocked.
Background technology
Number plate of vehicle is the numbering to each car, its main function is to be known that the affiliated province of car, city, county, car by car plate
Pipe can find the owner of car according to car plate, therefore license plate number to the meaning of car just as identification card number is to people, being vehicle
The important indicator of authentication.Therefore, the Vehicle License Plate Recognition System that the number-plate number is identified can be able in high speed manages
Extensive use.Vehicle License Plate Recognition System is based on the technologies such as Digital Image Processing, pattern-recognition, computer vision, to video camera
Taken vehicle image or video sequence is analyzed, and each unique number-plate number of automobile is obtained, so as to complete
Identification process, and the core identified includes algorithm of locating license plate of vehicle, Character Segmentation of License Plate and optical character recognition algorithms etc..When
Vehicle detection portion sorting measures when vehicle reaches and triggers image acquisition units, gathers current video image, Car license recognition unit
Image is handled, orients licence plate position, then the Character segmentation in licence plate is out identified, then forms license plate numbers
Code output.
But found during Vehicle License Plate Recognition System use, when some car plates are identified, system because
Last None- identified is caused to go out license plate number for that cannot be positioned so as to car plate.And the reason for cannot identifying, is because on car plate
Dust in attachment, or the debris such as leaf being dropped, cause car plate part to be blocked, and system fails License Plate, so that
Reduce accuracy of the Vehicle License Plate Recognition System to Car license recognition.Therefore, how to prevent car plate is blocked also just to become raising car
The research method of board identifying system recognition accuracy.
The content of the invention
It is clear by being carried out in time to the car plate being blocked the invention is intended to provide a kind of anti-detection method of license plate blocked
Reason, reaches the anti-of car plate and blocks purpose, so as to improve accuracy of the Vehicle License Plate Recognition System to Car license recognition.
The present invention provides base case：The anti-detection method of license plate blocked, including herein below, number-plate number identification step
Suddenly：Vehicle snapshot module, which to the vehicle travelled in road capture, obtains vehicle image information, and then processing module is to vehicle
The vehicle image information that module obtains is captured to be handled and generate the number-plate number information of the vehicle；
Wherein, before being identified to the number-plate number, the cleaning process to car plate is further included：A, induction module in road
Sensing step：Vehicle is driven at the induction module for being arranged on and capturing in front of module, triggering sensing mould during vehicle travels
The one of sensing unit of block sends inductive signal into processing module；
B, the verification step of processing module：After processing module receives inductive signal, according to the pass stored in memory module
In the relation list with the corresponding wiper mechanism of each sensing unit, processing module is to cleaning machine corresponding with the sensing unit
Structure sends control signal；
C, the cleaning step of the wiper mechanism of road side：Receive car plate of the wiper mechanism to the vehicle of control signal
Cleaned, the debris on car plate is rinsed out, vehicle continues to travel, and the vehicle snapshot module in front grabs the vehicle
Clap.
The operation principle of base case：In the present solution, before car plate is identified, first car plate is cleaned：Vehicle
During traveling, the induction module for being arranged on and capturing front is first passed through, vehicle can be from induction module during traveling
By so that triggering the sensing unit sends inductive signal, after sensing unit is triggered, handling mould on one of sensing unit
Block needs to control wiper mechanism to clean the car plate of the vehicle；
Before cleaning step is carried out, it is contemplated that different vehicles can be driven at the diverse location on road, so,
In order to ensure cleaning performance of the wiper mechanism to car plate, it is necessary to which wiper mechanism can carry out cleaning, institute in different directions
Corresponded with being provided with multiple wiper mechanisms in this programme with sensing unit, wiper mechanism and sensing are stored in memory module
The corresponding relation list of unit, therefore, processing module is after the inductive signal of sensing unit transmission is received, according to memory module
The relation list of middle storage determines to need the wiper mechanism of work, and sends control signals to the wiper mechanism, then receives
Wiper mechanism to control signal starts, and cleaning is carried out to the car plate of the vehicle, so that the debris on car plate is washed,
The scene of license plate shading is eliminated, continues to travel then as vehicle, vehicle has been driven at vehicle snapshot module, and car plate is grabbed
Clap module the vehicle is carried out to capture acquisition information of vehicles, then processing module again carries out the information of vehicles processing generation car plate
Number information, so as to complete the car plate detection to vehicle.
The beneficial effect of base case is：Compared with existing detection method of license plate, in 1. this method, carried out to car plate
Before detection, first the car plate of the vehicle is cleaned, the debris on car plate is washed, then the car plate of the vehicle is carried out again
Processing generation number-plate number information is captured, by first being cleaned to car plate, car plate is avoided and occurs due to being blocked by debris
Situation about cannot identify, so as to ensure that the accuracy of car plate detection；
2. by setting sensing unit to be engaged with wiper mechanism, realize to travel the vehicle of the diverse location on road into
Row cleaning, without limiting the traveling-position of vehicle, for vehicle, car plate has just obtained clearly during oneself is travelled
Wash, stop again cleaning car plate without vehicle specially is driven to roadside, realize and find the purpose cleaned in time in time.
Preferred solution one：Based on scheme it is preferred, in a, be arranged on the pretreatment module in front of induction module to car
Carry out Recognize, identification having the situation of debris when, processing module control induction module start.Beneficial effect：Consider
Situation to license plate shading belongs to unconventional phenomenon after all, and most car plate still falls within situation about being blocked from debris,
That is, cleaning and need not be carried out for each vehicle for running over induction module, so, sensed
Pre-treatment step first has been carried out to vehicle before step, car plate has been pre-processed by using pretreatment module, in this programme
Pretreatment module changes license plate recognition technology using anti-hide disclosed in Chinese patent CN102156862A, is identified to car plate
When, characters on license plate is split using image processing method, is judged to blocking if it cannot be split, also with regard to table
Show and there are debris on the car plate, the induction module of processing module control at this time starts, and wiper mechanism cleans car plate
To remove the debris on car plate, that is to say, that just only it is determined when being pre-processed to vehicle to open after blocking
Dynamic cleaning below, and when car plate does not have debris, it is not necessary to cleaned, and pretreatment module at this time will not
Judgement is blocked, and processing module would not also control induction module to start, and avoid energy waste.
Preferred solution two：Based on scheme it is preferred, in number-plate number identification step, processing module generation the number-plate number
After information, memory module is stored the number-plate number information.Beneficial effect：In working in intelligent transportation, sometimes
Waiting needs to carry out the license plate number of the vehicle by road review examination etc., and the number-plate number letter of the vehicle is generated in processing module
After breath, memory module is stored the number-plate number information, easy to the work such as review examination to the number-plate number information afterwards
Make.
Preferred solution three：Based on scheme it is preferred, the induction module in a is arranged on the deceleration strip of road.It is beneficial
Effect：Deceleration strip as make on the highway by vehicle deceleration means of transportation, be essential traffic on road
Facility, and sensing unit is installed on deceleration strip, vehicle slows down when deceleration strip is passed through, therefore the vehicle slows down at this time
Traveling, and remaining vehicle or normal speed traveling, so, also just increase the interval between vehicle and vehicle, so that
The interval time of sensing unit sampling is increased, so as to ensure that the accuracy of the inductive signal of sensing unit.
Preferred solution four：Based on scheme it is preferred, the wiper mechanism cleaned in c to car plate is installed on road two
Side.Beneficial effect：For the traveling without prejudice to vehicle on road, wiper mechanism has been arranged on the side of road, and in order to
Vehicle at diverse location is cleaned, the length for the current that wiper mechanism sprays is also just different, and if by wiper mechanism
It is arranged on the same side, then when vehicle traveling is in the side away from installation wiper mechanism, it is necessary to the water that wiper mechanism sprays
Distance remote enough, which can be sprayed onto, could be rinsed car plate with reaching the position of vehicle, therefore require sufficiently large
Pressure could realize, so, select for cleaning sprayer to be arranged on the both sides of road, also reducing current needs to reach most
Big distance, so as to reduce the demand to pressure.
Preferred solution five：Preferably four it is preferred, when being cleaned in c to car plate using high-pressure wash nozzle into
Row cleaning.Beneficial effect：Because license plate shading is by dust, or caused by the debris such as leaf being dropped, therefore using washing
It can dispose, and cleaning performance of the current to dust or fallen leaves then ensure that using high-pressure wash nozzle.
Brief description of the drawings
Fig. 1 is the schematic diagram of the anti-detection method of license plate embodiment blocked of the present invention；
Fig. 2 is the module frame chart of the detecting system used in the anti-detection method of license plate embodiment blocked of the present invention.
Embodiment
Below by the further details of explanation of embodiment：
Reference numeral in Figure of description includes：Pretreatment module 10, induction module 13, wiper mechanism 15, vehicle are grabbed
Clap module 17.
The anti-detection method of license plate blocked, including herein below, number-plate number identification step：The vehicle of car plate detection system
Capture module 17 vehicle travelled in road is carried out to capture acquisition vehicle image information, then processing module is to vehicle snapshot mould
The vehicle image information that block 17 obtains is handled and generates the number-plate number information of the vehicle, and memory module is to the number-plate number
Information is stored；
Wherein, before being identified to the number-plate number, the cleaning process to car plate is further included：A0, be arranged on induction module 13
The pretreatment module 10 in front carries out Recognize to vehicle, and when identification is having the situation of debris, processing module Perceived control should
Module 13 starts；A, the sensing step of the induction module 13 in road：Vehicle drives to the sensing for being arranged on and capturing in front of module
At module 13, induction module 13 includes the row's sensing unit being set up in parallel, and is triggered during vehicle travels therein
One sensing unit sends inductive signal into processing module；
B, the verification step of processing module：After processing module receives inductive signal, according to the pass stored in memory module
In the relation list of wiper mechanism 15 corresponding with each sensing unit, processing module is to cleaning corresponding with the sensing unit
Mechanism 15 sends control signal；
C, the cleaning step of the wiper mechanism 15 of road side：The wiper mechanism 15 of control signal is received to the vehicle
Car plate is cleaned, and the debris on car plate is rinsed out, and vehicle continues to travel, the vehicle snapshot module 17 in front to the vehicle into
Row is captured.
In order to realize the above-mentioned anti-detection method of license plate blocked, as shown in Fig. 2, the detecting system used is grabbed including vehicle
Module 17 is clapped, for carrying out shooting generation vehicle image information to vehicle；Processing module, for being generated to vehicle snapshot module 17
Vehicle image information processing is identified and generates number-plate number information；Memory module, for the number-plate number information into
Row storage；
Eight wiper mechanisms 15 positioned at both sides of the road are further included, eight wiper mechanisms 15 are divided to for two groups, are symmetricly set on
The both sides of road, wiper mechanism 15 can be rinsed the car plate of the vehicle of diverse location on road, in order to reach pair
The purpose that mud or fallen leaves on car plate are cleaned, using high-pressure wash nozzle as wiper mechanism 15 in the present embodiment；
Pretreatment module 10, for carrying out Recognize to vehicle, when identification is having the situation of debris, processing module control
Induction module 13 processed starts；
Induction module 13, induction module 13 are arranged on road speed band, positioned at the rear of pretreatment module 10, including it is more
A sensing unit being arranged in earth's surface, for sending inductive signal when wheel passes through, according to the road in different tracks,
The sensing unit of varying number can be set on road, as three lanes road on eight sensing units can be arranged side by side,
Four sensing units can be arranged side by side on the road in two tracks；Memory module, is stored with each sensing unit and each cleaning
The one-to-one relation list of mechanism 15, processing module can also be according to the inductive signals received to corresponding wiper mechanism
15 send control signal, and wiper mechanism 15 upon the reception of control signals cleans car plate.
In the present embodiment, before car plate is identified, first car plate is cleaned：Vehicle is during traveling, first
The induction module 13 in front is captured by being arranged on, since induction module 13 includes the multiple sensing units being set up in parallel, institute
Can be from one of sensing unit by so that triggering the sensing unit sends sensing letter during traveling with vehicle
Number, after sensing unit is triggered, processing module needs to control wiper mechanism 15 to clean the car plate of the vehicle；And consider
The situation of license plate shading belongs to unconventional phenomenon after all, and most car plate still falls within situation about being blocked from debris,
That is cleaning and need not be carried out for each vehicle for running over induction module 13, so, sensed
Pre-treatment step first has been carried out to vehicle before step, car plate has been pre-processed by using pretreatment module 10, in this programme
Pretreatment module 10 license plate recognition technology is changed using anti-hide disclosed in Chinese patent CN102156862A, carried out to car plate
When identification, characters on license plate is split using image processing method, is judged to blocking if it cannot be split,
Mean that and there are debris on the car plate, in this case, processing module control induction module 13 starts, wiper mechanism 15
Carry out cleaning；
Before cleaning step is carried out, it is contemplated that different vehicles can be driven at the diverse location on road, so,
In order to ensure cleaning performance of the wiper mechanism 15 to car plate, it is necessary to which wiper mechanism 15 can carry out scavenger in different directions
Make, correspond, stored in memory module clear with each sensing unit so being provided with multiple wiper mechanisms 15 in this programme
The relation list corresponding with sensing unit of washing machine structure 15, therefore, processing module are receiving the inductive signal of sensing unit transmission
Afterwards, determined to need the wiper mechanism 15 of work according to the relation list stored in memory module, and send control signals to this
Wiper mechanism 15, the wiper mechanism 15 for then receiving control signal start, and cleaning is carried out to the car plate of the vehicle, so that
Debris on car plate is washed, eliminates the scene of license plate shading, continues to travel then as vehicle, vehicle drives to
At vehicle snapshot module 17, car plate captures module and the vehicle is carried out to capture acquisition information of vehicles, and then processing module is again to this
Information of vehicles carries out processing generation number-plate number information, so as to complete the car plate detection to vehicle.
By taking the road of three lanes as an example, 4 wiper mechanisms 15, the wiper mechanism of both sides are respectively arranged with the both sides of road
15 are symmetrical arranged；Wiper mechanism 15 is numbered with the direction to draw near in Fig. 1, the wiper mechanism 15 on right side is respectively the right side
1st, the right side 2, the right side 3 and the right side 4, corresponding left side for a left side 1, a left side 2, a left side 3 and a left side 4；With direction from left to right, what induction module 13 included
Eight sensing units numbering is sensing unit A-H, then the corresponding managing listings of sensing unit and wiper mechanism 15 are as shown in Table 1.
Table one：
As shown in Figure 1, vehicle can drive at the pretreatment module 10 set on road first, pretreatment module 10 is to car
Carry out Recognize, identification having the situation of debris when, processing module control induction module 13 start, however as vehicle
Continuing to travel, vehicle can run over induction module 13, at sensing unit A (left side 1) during vehicle runs over induction module 13, sense
Unit A is answered to send inductive signal, processor controls corresponding left 1 wiper mechanism 15 to be rinsed car plate, will be miscellaneous on car plate
Thing washes；Then vehicle continues to travel, and comes at vehicle snapshot module 17, and vehicle snapshot module 17 shoots vehicle,
The vehicle image information of the vehicle is generated, then processing module is handled to obtain the car plate of the vehicle to the vehicle image information
Number information, memory module store the number-plate number information.
Above-described is only the embodiment of the present invention, and the general knowledge such as known concrete structure and characteristic is not made herein in scheme
Excessive description, technical field that the present invention belongs to is all before one skilled in the art know the applying date or priority date
Ordinary technical knowledge, can know the prior art all in the field, and with using normal experiment hand before the date
The ability of section, one skilled in the art can improve and implement under the enlightenment that the application provides with reference to self-ability
This programme, some typical known features or known method should not implement the application as one skilled in the art
Obstacle.It should be pointed out that for those skilled in the art, without departing from the structure of the invention, it can also make
Go out several modifications and improvements, these should also be considered as protection scope of the present invention, these effects implemented all without the influence present invention
Fruit and practical applicability.The scope of protection required by this application should be based on the content of the claims, the tool in specification
The records such as body embodiment can be used for the content for explaining claim.
Claims (6)
1. the anti-detection method of license plate blocked, including herein below, number-plate number identification step：Vehicle snapshot module is in road
The vehicle of traveling, which capture, obtains vehicle image information, the vehicle image letter that then processing module obtains vehicle snapshot module
Breath is handled and generates the number-plate number information of the vehicle；License plate shading analysis module knows the number-plate number information
Not, enabling signal is exported to car plate wiper mechanism when having recognized unexpected block, the output warning when recognizing premeditated block
Signal；
It is characterized in that：Before being identified to the number-plate number, the cleaning process to car plate is further included：A, the induction module in road
Sensing step：Vehicle is driven at the induction module for being arranged on and capturing in front of module, and vehicle triggers sensing during travelling
The one of sensing unit of module sends inductive signal into processing module；
B, the verification step of processing module：After processing module receives inductive signal, according to stored in memory module on
The relation list of each corresponding wiper mechanism of sensing unit, processing module are sent out to wiper mechanism corresponding with the sensing unit
Send control signal；
C, the cleaning step of wiper mechanism：The wiper mechanism for receiving control signal cleans the car plate of the vehicle, by car
Debris on board rinses out, and vehicle continues to travel, and the vehicle snapshot module in front captures the vehicle.
2. the anti-detection method of license plate blocked according to claim 1, it is characterised in that：Before induction module being arranged in a
The pretreatment module of side carries out Recognize to vehicle, when identification is having the situation of debris, processing module control induction module
Start.
3. the anti-detection method of license plate blocked according to claim 1, it is characterised in that：In number-plate number identification step,
After processing module generation number-plate number information, memory module is stored the number-plate number information.
4. the anti-detection method of license plate blocked according to claim 1, it is characterised in that：Induction module in a is arranged on
On the deceleration strip of road.
5. the anti-detection method of license plate blocked according to claim 1, it is characterised in that：Car plate is cleaned in c
Wiper mechanism is installed on both sides of the road.
6. the anti-detection method of license plate blocked according to claim 5, it is characterised in that：When being cleaned in c to car plate
Cleaned using high-pressure wash nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711423913.4A CN108021915A (en) | 2017-12-25 | 2017-12-25 | The anti-detection method of license plate blocked |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711423913.4A CN108021915A (en) | 2017-12-25 | 2017-12-25 | The anti-detection method of license plate blocked |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108021915A true CN108021915A (en) | 2018-05-11 |
Family
ID=62070966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711423913.4A Pending CN108021915A (en) | 2017-12-25 | 2017-12-25 | The anti-detection method of license plate blocked |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322259A (en) * | 2018-09-29 | 2019-02-12 | 河海大学常州校区 | A kind of license plate surface snowberg automatic cleaning apparatus and method |
| CN110379080A (en) * | 2019-06-05 | 2019-10-25 | 江阴市富仁高科股份有限公司 | A kind of fuel loading system and oiling method based on license plate number intelligent recognition |
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| CN102568202A (en) * | 2011-12-23 | 2012-07-11 | 北京易华录信息技术股份有限公司 | License plate sheltering detection system and detection method |
| CN202584427U (en) * | 2011-12-23 | 2012-12-05 | 北京易华录信息技术股份有限公司 | License plate sheltering detection system |
| WO2013052773A1 (en) * | 2011-10-05 | 2013-04-11 | L-3 Communications Mobilevision Inc. | Multiple resolution camera system for automated license plate recognition and event recording |
| CN206090392U (en) * | 2016-10-12 | 2017-04-12 | 江苏阅衡智能科技有限公司 | Automotive electronics gate with cleaning function |
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2017
- 2017-12-25 CN CN201711423913.4A patent/CN108021915A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013052773A1 (en) * | 2011-10-05 | 2013-04-11 | L-3 Communications Mobilevision Inc. | Multiple resolution camera system for automated license plate recognition and event recording |
| CN102568202A (en) * | 2011-12-23 | 2012-07-11 | 北京易华录信息技术股份有限公司 | License plate sheltering detection system and detection method |
| CN202584427U (en) * | 2011-12-23 | 2012-12-05 | 北京易华录信息技术股份有限公司 | License plate sheltering detection system |
| CN206090392U (en) * | 2016-10-12 | 2017-04-12 | 江苏阅衡智能科技有限公司 | Automotive electronics gate with cleaning function |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109322259A (en) * | 2018-09-29 | 2019-02-12 | 河海大学常州校区 | A kind of license plate surface snowberg automatic cleaning apparatus and method |
| CN110379080A (en) * | 2019-06-05 | 2019-10-25 | 江阴市富仁高科股份有限公司 | A kind of fuel loading system and oiling method based on license plate number intelligent recognition |
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