CN106056730A - Community garage intelligent access control system based on license plate detection and application method thereof - Google Patents
Community garage intelligent access control system based on license plate detection and application method thereof Download PDFInfo
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- CN106056730A CN106056730A CN201610647165.7A CN201610647165A CN106056730A CN 106056730 A CN106056730 A CN 106056730A CN 201610647165 A CN201610647165 A CN 201610647165A CN 106056730 A CN106056730 A CN 106056730A
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- Prior art keywords
- garage
- controller
- license plate
- car
- host computer
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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
-
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
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Abstract
The invention discloses a community garage intelligent access control system based on license plate detection. The system comprises an upper computer, a controller, a garage access control system, a display screen, a camera, a vehicle detector, a storage and a power supply. The upper computer is in communication connection with the controller. The garage access control system, the display screen, the camera, the storage and the vehicle detector are all connected to the controller. Each part is powered by the power supply. Meanwhile, the invention discloses an application method of the system. The camera is used for acquiring license plates, and license plate images are sent into the upper computer for comparison. Then, the access control system of a community garage can be controlled intelligently, and response speed is fast and practicality is strong.
Description
Technical field
The present invention relates to a kind of garage, community Intelligent entrance guard management system based on car plate detection and using method, belong to door
Prohibit device field.
Background technology
Along with day by day improving of country's living standards of the people and developing rapidly of auto industry, therefore increasing private
Family's car enters in daily life, huge simultaneously also brings a series of asking easily bringing to people's life
Topic.Wherein along with the increase day by day of community householder's vehicle, bring a series of asking to the management of the daily vehicle in garage, community
Topic.The most substantial amounts of external vehicle garage, random Ting Ru community and occupy the parking stall that community householder is had, thus give community
Householder is stopped and is brought the biggest difficulty, too increases the management difficulty in garage, community.Therefore, design a set of simple, practical,
Low cost, stable community garage access control system will have the biggest market application foreground.
For the realization of the access control system in garage, community, there is a variety of method.Du Yun proposes a kind of community intelligence
Gate inhibition management apparatus (CN 201510763019), the method structure includes vehicle recognition card and gate control system；Described gate inhibition identifies
System includes antenna, read-write controller, power supply and external equipment；Described read-write controller includes display, rfid card, warning
Device, buzzer, ground induction coil, coil checker；Described external equipment includes current grade and electric railing；Gate control system includes car
Import and vehicle outlet, inlet and outlet is provided with a ground induction coil, and ground induction coil side is provided with photographic head, separately
Side is provided with RFID card reader；Described card reader is placed in outside gate.By software access control.This method cost is high, knot
Structure is complicated, is difficult to realize.
Summary of the invention
In order to solve above-mentioned technical problem, the invention provides a kind of garage, community intelligent entrance guard pipe based on car plate detection
Reason system and using method.
In order to achieve the above object, the technical solution adopted in the present invention is:
Garage, community Intelligent entrance guard management system based on car plate detection, including host computer, controller, garage gate inhibition system
System, display screen, photographic head, wagon detector, memorizer and power supply；
Described host computer and controller communication connection, described garage access control system, display screen, photographic head, memorizer and car
Detector is all connected with controller, and described power supply is that all parts is powered.
Also include that lift car stopping pole, described lift car stopping pole are connected with controller.
Described power supply is solar electric power supply system.
Described memorizer is SD card.
The using method of garage, community Intelligent entrance guard management system based on car plate detection, comprises the following steps,
Step 1, wagon detector has detected whether vehicle, when vehicle having been detected, sends initial order to controller；
Step 2, controller receive initial order, control photographic head and start working；
Step 3, camera collection license plate image, and license plate image is sent to host computer by controller；
Step 4, host computer extracts car plate according to license plate image, is entered with car plate in local car plate storehouse by the car plate extracted
Row comparison, is sent to controller by comparison result；
Step 5, comparing result is sent to display screen and shows, sends to garage access control system according to comparing result by controller
Access control instructs；
Step 6, garage access control system carries out corresponding action according to access control instruction.
Host computer extracts the process of car plate,
S1, host computer receive license plate image, and show；
S2, license plate image format conversion is become the treatable form of host computer；
S3, the license plate image through format conversion is carried out gray processing process；
S4, the license plate image through gray processing is filtered process；
S5, license plate image after filtering is carried out equalization；
S6, the license plate image through equalization is converted into binary map；
S7, the license plate outline in binary map is extracted, it is thus achieved that car plate.
Filtering uses the medium filtering of sliding window.
Contours extract uses canny operator to carry out contours extract.
When not allowing vehicles while passing, host computer sends car stopping pole control instruction to controller, controls lift car stopping pole.
When the license plate image sending host computer is unintelligible, host computer sends photographic head to controller and adjusts instruction, adjusts
Photographic head.
The beneficial effect that the present invention is reached: 1, the present invention uses photographic head to be acquired automotive license plate, by inciting somebody to action
License plate image is sent into host computer and is contrasted, such that it is able to the gate control system controlling garage, community of intelligence, reflection speed is fast, real
Strong by property；2, the present invention uses solar power system, energy-conserving and environment-protective.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the present invention.
Fig. 2 is the flow chart extracting car plate.
Fig. 3 is 3 × 3 square sliding windows.
Detailed description of the invention
The invention will be further described below in conjunction with the accompanying drawings.Following example are only used for clearly illustrating the present invention
Technical scheme, and can not limit the scope of the invention with this.
As it is shown in figure 1, garage, community Intelligent entrance guard management system based on car plate detection, including host computer, controller, car
Storehouse gate control system, display screen, photographic head, lift car stopping pole, memorizer, wagon detector and power supply.
Host computer and controller communication connection, garage access control system, lift car stopping pole, memorizer, display screen, photographic head
All being connected with controller with wagon detector, power supply is that all parts is powered.
Above-mentioned photographic head uses the OV7670 photographic head that OV company produces, and OV7670 is the digital camera of a CMOS,
Its output data can be directly by computer or digital signal processor institute processed.
Above-mentioned power supply uses solar electric power supply system, energy-conserving and environment-protective.
Above-mentioned memorizer is SD card, the information such as time that can store vehicles while passing.
Above-mentioned host computer uses computer.
Controller noted above uses the STM32F103ZET6 microprocessor of ST ST Microelectronics.
Being connected by bluetooth module between host computer and controller, particularly use HC-05 bluetooth module, HC-05 is blue
Tooth module is a principal and subordinate's bluetooth module based on bluetooth 2.0 standard, and its communication speed, up to 1Mb/s, can meet this completely
The transmission requirement of system.
Above-mentioned display screen uses TFT color screen display screen, and RGB565 colour picture can be shown by TFT color screen display screen,
And support the scan pattern of multiple image.
Above-mentioned wagon detector uses infrared vehicle detector, and by the signal of wagon detector feedback, controller is permissible
Control photographic head to be closed when without vehicle.
The using method of garage, above-mentioned community Intelligent entrance guard management system, comprises the following steps:
Step 1, wagon detector has detected whether vehicle, when vehicle having been detected, sends initial order to controller.
Step 2, controller receive initial order, control photographic head and start working.
Step 3, camera collection license plate image, and license plate image is sent to host computer by controller.
Step 4, host computer extracts car plate according to license plate image, is entered with car plate in local car plate storehouse by the car plate extracted
Row comparison, is sent to controller by comparison result.
Step 5, comparing result is sent to display screen and shows, sends to garage access control system according to comparing result by controller
Access control instructs.
Step 6, garage access control system carries out corresponding action according to access control instruction.
As in figure 2 it is shown, the process that host computer extracts car plate is:
S1, host computer receive license plate image, and show.
When the license plate image sending host computer is unintelligible, host computer sends photographic head to controller and adjusts instruction, adjusts
Photographic head.Such as: when sending 0x05, light filling regulation is represented；Represent that saturation regulates when sending 0x06 instruction；Work as transmission
During 0x07 instruction, represent brightness regulation；Contrast adjustment is represented when sending 0x08.
S2, license plate image format conversion is become the treatable form of host computer.
License plate image owing to gathering is the data image of RGB565 form, and host computer institute is treatable for RGB24 lattice
The data image of formula, therefore need to change into the data image of RGB565 form RGB24 form data image.
S3, the license plate image through format conversion is carried out gray processing process.
In the license plate image of gray processing any point pixel be f (x, y), then should meet 0≤f (x, y)≤255,
When gray value is 0 interval scale ater, and gray value is 255 interval scale pure whites, it is assumed that a certain color pixel cell (x, correspondence y)
R (red), G (green), B (blue) component value be respectively r, g, b, then after converting gray value be r × 0.299+g × 0.587+b
×0.114。
S4, the license plate image through gray processing is filtered process.
The medium filtering of filtering employing sliding window, the particularly medium filtering of 3 × 3 sliding windows, as shown in Figure 3, it is assumed that 9
The pixel value in individual field is that { P1, P2, P3, P4, P, P5, P6, P7, P8}, wherein intermediate value is P, the value of the most pending pixel
For intermediate value P, meet formula:
G (x, y)=Medium{f (x, y), x, y ∈ W}
Wherein, (x, y) is pending pixel to g, and W is territory, and Medium is for seeking median function.
S5, license plate image after filtering is carried out equalization.
Carrying out equalization primarily to improve change and the contrast of the gray tone of image, this needs original image
The more gray level of middle pixel number carries out suitable extension and carries out the gray level that pixel number in original image is few
Suitably shrink.
S6, the license plate image through equalization is converted into binary map.
Each pixel in binary map only has two kinds of possible values or tonal gradation, i.e. grey scale pixel value to only have 0
With 1, the most black and white two gray levels；When the gray value of pixel a certain in figure is more than set threshold values, then the two of correspondence
In value figure, this point value is 1, is otherwise 0.
S7, the license plate outline in binary map is extracted, it is thus achieved that car plate.
Common contours extract operator has canny operator, sobel operator, robert gradient operator, prewitt operator etc.
Deng, use canny operator to carry out contours extract here, canny operator is first derivative operator based on Gaussian function, is to point
The product of position and the optimization Approximation Operator of signal to noise ratio.
When there are special circumstances, such as: finishing etc. in front of the door, when not allowing vehicles while passing, host computer sends to controller and keeps off a car
Post control instruction, controls lift car stopping pole and rises.
Said system use photographic head automotive license plate is acquired, by license plate image is sent into host computer carry out right
Ratio, such that it is able to the gate control system controlling garage, community of intelligence, reflection speed is fast, practical.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, on the premise of without departing from the technology of the present invention principle, it is also possible to make some improvement and deformation, these improve and deformation
Also should be regarded as protection scope of the present invention.
Claims (10)
1. garage, community Intelligent entrance guard management system based on car plate detection, it is characterised in that: include host computer, controller, car
Storehouse gate control system, display screen, photographic head, wagon detector, memorizer and power supply；
Described host computer and controller communication connection, described garage access control system, display screen, photographic head, memorizer and vehicle inspection
Surveying device to be all connected with controller, described power supply is that all parts is powered.
Garage, community Intelligent entrance guard management system based on car plate detection the most according to claim 1, it is characterised in that: also
Including lift car stopping pole, described lift car stopping pole is connected with controller.
Garage, community Intelligent entrance guard management system based on car plate detection the most according to claim 1, it is characterised in that: institute
Stating power supply is solar electric power supply system.
Garage, community Intelligent entrance guard management system based on car plate detection the most according to claim 1, it is characterised in that: institute
Stating memorizer is SD card.
5. using method based on garage, the community Intelligent entrance guard management system based on car plate detection described in claim 2, its
It is characterised by: comprise the following steps,
Step 1, wagon detector has detected whether vehicle, when vehicle having been detected, sends initial order to controller；
Step 2, controller receive initial order, control photographic head and start working；
Step 3, camera collection license plate image, and license plate image is sent to host computer by controller；
Step 4, host computer extracts car plate according to license plate image, is compared with car plate in local car plate storehouse by the car plate extracted
Right, comparison result is sent to controller；
Step 5, comparing result is sent to display screen and shows, sends gate inhibition according to comparing result to garage access control system by controller
Control instruction；
Step 6, garage access control system carries out corresponding action according to access control instruction.
The using method of garage, community Intelligent entrance guard management system based on car plate detection the most according to claim 5, its
It is characterised by: host computer extracts the process of car plate and is,
S1, host computer receive license plate image, and show；
S2, license plate image format conversion is become the treatable form of host computer；
S3, the license plate image through format conversion is carried out gray processing process；
S4, the license plate image through gray processing is filtered process；
S5, license plate image after filtering is carried out equalization；
S6, the license plate image through equalization is converted into binary map；
S7, the license plate outline in binary map is extracted, it is thus achieved that car plate.
The using method of garage, community Intelligent entrance guard management system based on car plate detection the most according to claim 6, its
It is characterised by: filtering uses the medium filtering of sliding window.
A kind of garage, community Intelligent entrance guard management system based on car plate detection the most according to claim 6, its feature exists
In: contours extract uses canny operator to carry out contours extract.
The using method of garage, community Intelligent entrance guard management system based on car plate detection the most according to claim 5, its
Being characterised by: when not allowing vehicles while passing, host computer sends car stopping pole control instruction to controller, controls lift and keeps off a car
Post.
The using method of garage, community Intelligent entrance guard management system based on car plate detection the most according to claim 5, its
Being characterised by: when the license plate image sending host computer is unintelligible, host computer sends photographic head to controller and adjusts instruction, adjusts
Photographic head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610647165.7A CN106056730A (en) | 2016-08-09 | 2016-08-09 | Community garage intelligent access control system based on license plate detection and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610647165.7A CN106056730A (en) | 2016-08-09 | 2016-08-09 | Community garage intelligent access control system based on license plate detection and application method thereof |
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| CN106056730A true CN106056730A (en) | 2016-10-26 |
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ID=57481175
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610647165.7A Pending CN106056730A (en) | 2016-08-09 | 2016-08-09 | Community garage intelligent access control system based on license plate detection and application method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106374953A (en) * | 2016-11-21 | 2017-02-01 | 丹阳伦图电子技术有限公司 | Vehicle in-out system based on wireless pass-through module |
| CN108765666A (en) * | 2018-06-07 | 2018-11-06 | 安徽三六五办公科技有限公司 | A kind of intelligent recognition vehicle management system |
| CN111968289A (en) * | 2020-08-23 | 2020-11-20 | 湖南银宝科技发展有限公司 | Linkage control system of vehicle stopping tire breaker and multiple electric garage doors |
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Application publication date: 20161026 |