CN108921956A - A kind of curb parking charge management method based on Video Analysis Technology - Google Patents
A kind of curb parking charge management method based on Video Analysis Technology Download PDFInfo
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- CN108921956A CN108921956A CN201810711366.8A CN201810711366A CN108921956A CN 108921956 A CN108921956 A CN 108921956A CN 201810711366 A CN201810711366 A CN 201810711366A CN 108921956 A CN108921956 A CN 108921956A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/40—Scenes; Scene-specific elements in video content
- G06V20/41—Higher-level, semantic clustering, classification or understanding of video scenes, e.g. detection, labelling or Markovian modelling of sport events or news items
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- G—PHYSICS
- G07—CHECKING-DEVICES
- G07B—TICKET-ISSUING APPARATUS; FARE-REGISTERING APPARATUS; FRANKING APPARATUS
- G07B15/00—Arrangements or apparatus for collecting fares, tolls or entrance fees at one or more control points
- G07B15/02—Arrangements or apparatus for collecting fares, tolls or entrance fees at one or more control points taking into account a variable factor such as distance or time, e.g. for passenger transport, parking systems or car rental systems
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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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Abstract
The invention provides a kind of curb parking charge management method based on Video Analysis Technology, and this method includes two parts：Video flow processing and Car license recognition.This method utilizes Video Analysis Technology, camera collected video flowing in section is handled, using in advance in the method for parking stall region setting virtual coil, disengaging parking stall vehicle is analyzed and processed, the vehicle key frame still image in disengaging parking stall region is extracted, records the time in vehicles while passing parking stall region；Using the vehicle key frame still image of extraction as the input of Car license recognition part, parking vehicle license plate number is identified；The vehicle parking amount of money is generated using obtained information.This method is based on the video flowing acquired now throughout the monitoring camera of intelligent transportation field, utilize advanced Video Analysis Technology, low-cost high-efficiency realizes curb parking automation, unattended charging managementing mode, while improving the curb parking efficiency of management, human and material resources are saved, solve the problems, such as parking fee capital loss caused by the long-standing charge method backwardness of curb parking.
Description
Technical field
The invention belongs to intelligent transportation fields, propose a kind of charge management method suitable for curb parking, and in particular to
A kind of curb parking charge management method based on Video Analysis Technology.
Background technique
Video Analysis Technology refers to using computer picture Visual analysis techniques, by separating background in scene and target
And then it analyzes and tracks the target in camera scene.There are mainly four types of its basic fundamentals：Motion detection, target following, mesh
Mark detection and target identification.It is generally divided into two classes：One kind is based on Background Modeling, mainly includes that boundary defence exists
Interior behavioural analysis etc.；One kind is based on being identified by feature, including Car license recognition, recognition of face etc..Video Analysis Technology is got over
The fields such as security protection, intelligent transportation, city management are more widely used in, can effectively promote the intelligent level of each system.
With quickly propelling for process of modernization, the sustainable development of China's economy, the quantity of private car is every year all
Increasing.Driving is difficult, parking difficulty problem is increasingly prominent out in the major small and medium cities in China.The appearance of curb parking is exactly to be
Solve the needs of problems that off-street parking lot is not able to satisfy the parking of citizen drive routine；Alleviate city space and vehicle growth rate
Between contradiction, improve city space utilization rate.However, existing curb parking charging managementing mode：Manual toll collection, Parking Meter are received
All there are many deficiencies in expense, life outdoor videos parking stall measure charge method.Manual toll collection lacks effective Supervision Measures, will cause
Parking fund is largely lost, and needs to pay higher cost of labor；Parking Meter is charged mainly by driver's self-help payment, some
Driver's payment consciousness is inadequate, and also resulting in parking fund can not recycle, and the installation of Parking Meter destroys road surface, installation cost
Height is not easy to maintenance and management；The mode of life outdoor videos parking stall measure need each parking stall place one to drive into vehicle into
Row Car license recognition and parking space state judgement, there are many disadvantages for this scheme：It is at high cost, ground is destroyed, and due to video stake
Height it is suitable with license plate height, be easy by malicious sabotage etc..It is wanted based on the above phenomenon, and to roadside intelligent parking
It asks, proceeds from the reality, in conjunction with roadside infrastructure condition and the prior art, propose that a kind of roadside based on Video Analysis Technology is stopped
Vehicle charge management method is handled the collected video flowing of section camera using Video Analysis Technology, obtain vehicle into
The license plate number of the still image of parking area, the time of vehicles while passing parking area, vehicle out is stopped using the generation of these information
Fare is used.
Summary of the invention
It is an object of the invention to promote the intelligence of curb parking management, the long-standing payment collector of curb parking is solved
The problem of parking fee capital loss caused by formula falls behind, realizes the automation of curb parking, unattended charging managementing mode,
While improving the curb parking efficiency of management, human and material resources are saved.
In order to solve problem above, the present invention proposes a kind of curb parking toll administration side based on Video Analysis Technology
Method includes the following steps：
(1) camera is responsible for managing multiple parking stalls of section parking area；
(2) parking stall region virtual coil is preset in the camera view of section, establishes background model；
(3) Video Analysis Technology is utilized, moving vehicle in the monitoring area of section is detected and is tracked；
(4) when moving vehicle initially enters virtual coil, for the first time trigger video flowing key-frame extraction, obtain vehicle into
Enter still image, is stored in database；
(5) continue pursuit movement vehicle and enter virtual coil, until obtained vehicle is entered into static state after vehicle comes to a complete stop
Image is sent to license plate number identification module, obtains vehicle number license plate number, is stored in number as parking vehicle unique identifier
According to library, and record the down time of the vehicle；
(6) when moving vehicle initially moves off virtual coil, second of triggering video flowing key-frame extraction, obtained vehicle
Still image is left, database is stored in；
(7) continue pursuit movement vehicle and leave virtual coil, until vehicle leaves completely, obtained vehicle is left into static state
Image is sent to license plate number identification module, obtains vehicle number license plate number, is stored in database, and record leaving for the vehicle
Time.
(8) according to the difference of the record of time twice of disengaging virtual coil vehicle, curb parking charged duration is obtained, generates and receives
Take the amount of money.
Further, a camera is responsible for multiple parking stalls in section monitoring management camera view Nei in step (1), will
Collected video is uploaded to server video stream process module, is analyzed and processed using Video Analysis Technology to video flowing.
Further, virtual coil is arranged in the parking stall region within the scope of video field to step (2) in advance, and in the area
Background model is established in domain, according to preset time interval more new model, for judging the virtual coil region in video flowing
Interior vehicles while passing situation.
Further, the difference of the gray value of the region and the regional background model in video flowing is judged using virtual coil, benefit
With the disengaging situation of vehicle in this difference and preset different threshold decision parking stalls region.
Further, license plate number identification step includes：
(51) image preprocessing, pretreatment include that Gaussian Blur eliminates picture noise, gray processing removes invalid colouring information；
(52) License Plate positions license plate using strategy from coarse to fine, so that License Plate adapts to
Roadside complex environment, quickly navigates to area-of-interest.Rough localization method is：Headstock or the tailstock are positioned, because license plate is
Include that ROI is limited within the scope of coarse positioning in the two regions, carries out next step accurate positioning；Accurate positioning method
For：The result images of edge detection are carried out binaryzation by sobel operator edge detection method, and profile is extracted in then closed operation,
Minimum circumscribed rectangle is obtained, license plate candidate area is screened；
(53) training license plate discrimination model waits segment to the license plate navigated in (52) and predicts whether judge them
For license plate area, it is, remains, otherwise gives up；
(54) license plate deflection is corrected, and whether within the preset range license plate rectangular area deflection is judged, otherwise to this
Rectangular area is rotated, deflection correction；
(55) Character segmentation carries out Character segmentation to license plate image using sciagraphy；
(56) training CNN model, identifies the character segment after segmentation；
(57) recognition result obtains digital number plate, as parking vehicle unique identifier.
Further, step (7) obtains leaving virtual coil vehicle number license plate number, by the number inquiry database
Vehicle unique identifier, if inquiry obtain as a result, if represent a whole set of behavior of vehicle parking complete；If do not inquired
As a result, then deleting this vehicle registration.
Further, this method using Video Analysis Technology and presets virtual coil, and obtained information and effect includes：
The still image of vehicles while passing parking area is put to the proof as curb parking toll administration, the time of vehicles while passing parking area, vehicle
License plate number the necessary information of Parking Fee is generated as vehicle, these information realize the unattended road of automation enough
Side the management of parking charge mode.
Compared with prior art, the invention has the advantages and positive effects that：
1. utilizing Video Analysis Technology, camera collected video flowing in section is handled, using stopping in advance
The method of position region setting virtual coil, is analyzed and processed disengaging parking stall vehicle, extracts the vehicle in disengaging parking stall region
Key frame still image, the time for recording vehicles while passing parking stall region；Using the vehicle key frame still image of extraction as
The input of Car license recognition part identifies parking vehicle license plate number；The vehicle parking amount of money, low cost are generated using obtained information
It is efficient to realize curb parking automation, unattended charging managementing mode, improve the same of the curb parking efficiency of management
When, human and material resources are saved, solve asking for parking fee capital loss caused by the long-standing charge method of curb parking falls behind
Topic.
2. the present invention improves the plate location recognition accuracy rate under curb parking environment.Due to curb parking background environment
Complexity, so, using strategy from coarse to fine, it is fixed to improve license plate by the ROI of quick positioning licence plate in plate location recognition process
The efficiency and accuracy rate of position；Training CNN model, improves Recognition of License Plate Characters precision, totally can effectively promote roadside complex environment
The accuracy rate of lower Car license recognition.
Detailed description of the invention
Fig. 1 is the curb parking charge management method work flow diagram based on Video Analysis Technology.
Fig. 2 is license plate number recognition methods flow chart.
Specific embodiment
The present invention is described in further details now in conjunction with attached drawing.
As shown in Figure 1, the curb parking charge management method work flow diagram based on Video Analysis Technology, major part packet
It includes license plate number identification and video flow processing, workflow is：
(1) using the collected video flowing of section camera as input, video flow processing is carried out to it；
(2) parking stall region virtual coil is preset in the camera view of section, establishes background model, and according to
Preset time interval updates background model；
(3) Video Analysis Technology is utilized, moving vehicle in the monitoring area of section is detected and is tracked；
(4) when moving vehicle initially enters virtual coil, for the first time trigger video flowing key-frame extraction, obtain vehicle into
Enter still image, is stored in database；
(5) continue pursuit movement vehicle and enter virtual coil, until obtained vehicle is entered into static state after vehicle comes to a complete stop
Image is sent to license plate number identification module, and identification obtains vehicle number license plate number, deposits as parking vehicle unique identifier
Enter database, and records the down time of the vehicle；
(6) when moving vehicle initially moves off virtual coil, second of triggering video flowing key-frame extraction, obtained vehicle
Still image is left, database is stored in；
(7) continue pursuit movement vehicle and leave virtual coil, until vehicle leaves completely, obtained vehicle is left into static state
Image is sent to license plate number identification module, obtains vehicle number license plate number, passes through the vehicle in the number inquiry database
Unique identifier, if inquiry obtain as a result, if represent a whole set of behavior of vehicle parking complete, record when leaving of the vehicle
Between；If not obtaining query result, this vehicle registration is deleted；
(8) according to the difference of the record of time twice of disengaging virtual coil vehicle, curb parking charged duration is obtained, generation stops
The vehicle amount of money.
This method utilizes Video Analysis Technology, handles the collected video flowing of section camera, by existing in advance
Virtual coil is arranged in parking stall region, is analyzed and processed to disengaging parking stall vehicle, extracts the vehicle in disengaging parking stall region
Key frame still image, the time for recording vehicles while passing parking stall region；Using the vehicle key frame still image of extraction as vehicle
The input of board identification division identifies parking vehicle license plate number；The vehicle parking amount of money is generated using obtained information, realizes and stops
The full-automation of vehicle timing provides foundation for Car park payment.
As shown in Fig. 2, for the license plate number identification side in the curb parking charge management method based on Video Analysis Technology
Method flow chart, the specific steps are that：
(1) by video flowing analyze in the vehicle key frame still image that extracts, inputted as Car license recognition；
(2) image preprocessing, pretreatment include that Gaussian Blur eliminates picture noise, gray processing removes invalid colouring information；
(3) License Plate positions license plate using strategy from coarse to fine, so that License Plate adapts to roadside and answers
Miscellaneous
Environment quickly navigates to area-of-interest.Rough localization method is：Headstock or the tailstock are positioned, because license plate is packet
It is contained in
In the two regions, ROI is limited within the scope of coarse positioning, carries out next step accurate positioning；Accurate positioning side
Method is：
The result images of edge detection are carried out binaryzation by sobel operator edge detection method, and then closed operation is extracted
Profile,
Minimum circumscribed rectangle is obtained, license plate candidate area is screened；
(4) training SVM license plate discrimination model waits segment to the license plate navigated in (3) and predicts whether judge them
For license plate area, it is, remains, otherwise gives up；
(5) license plate deflection is corrected, and whether within the preset range license plate rectangular area deflection is judged, otherwise to the square
Shape region is rotated, and deflection correction obtains positive license plate segment；
(6) Character segmentation carries out Character segmentation to license plate image using sciagraphy；
(7) training CNN model, identifies the character segment after segmentation；
(8) recognition result obtains digital number plate, as parking vehicle unique identifier.
In order to improve the Car license recognition accuracy rate under the complex environment of roadside, the Car license recognition process of this method design, be
It is innovated on the basis of traditional license plate identification process, using License Plate strategy from coarse to fine, quick positioning licence plate
ROI improves the efficiency and accuracy rate of License Plate；Training CNN model, improves Recognition of License Plate Characters precision, totally can effectively mention
Rise the accuracy rate of Car license recognition under the complex environment of roadside.
The above is better embodiment of the invention, be should not be considered as limiting the scope of the invention.
Without departing from the principle of the present invention, all the changes and improvements etc. done should also belong to patent of the invention and cover
Range.
Claims (7)
1. a kind of curb parking charge management method based on Video Analysis Technology, which is characterized in that include the following steps：
(1) camera is responsible for managing multiple parking stalls of section parking area；
(2) parking stall region virtual coil is preset in the camera view of section, establishes background model；
(3) Video Analysis Technology is utilized, moving vehicle in the monitoring area of section is detected and is tracked；
(4) when moving vehicle initially enters virtual coil, for the first time trigger video flowing key-frame extraction, obtain vehicle enter it is quiet
State image is stored in database；
(5) continue pursuit movement vehicle and enter virtual coil, until obtained vehicle is entered into still image after vehicle comes to a complete stop
It is sent to license plate number identification module, obtains vehicle number license plate number, is stored in database as parking vehicle unique identifier,
And record the down time of the vehicle；
(6) when moving vehicle initially moves off virtual coil, second of triggering video flowing key-frame extraction, obtained vehicle is left
Still image is stored in database；
(7) continue pursuit movement vehicle and leave virtual coil, until vehicle leaves completely, obtained vehicle is left into still image
It is sent to license plate number identification module, obtains vehicle number license plate number, is stored in database, and record when leaving of the vehicle
Between.
(8) according to the difference of the record of time twice of disengaging virtual coil vehicle, curb parking charged duration is obtained, generates charge gold
Volume.
2. the curb parking charge management method according to right 1 based on Video Analysis Technology, which is characterized in that step
(1) camera is responsible for multiple parking stalls in section monitoring management camera view Nei in, and collected video is uploaded to
Server video stream process module is analyzed and processed video flowing using Video Analysis Technology.
3. the curb parking charge management method according to right 1 based on Video Analysis Technology, which is characterized in that step
(2) virtual coil is arranged in the parking stall region within the scope of video field in advance, and establishes background model in the region, according to
Preset time interval more new model, for judging the vehicles while passing situation in video flowing in the virtual coil region.
4. the curb parking charge management method according to right 1 based on Video Analysis Technology, which is characterized in that utilize void
Quasi- coil judges the difference of the gray value of the region and the regional background model in video flowing, using this difference and presets
Different threshold decision parking stalls region in vehicle disengaging situation.
5. the curb parking charge management method according to right 1 based on Video Analysis Technology, which is characterized in that license plate number
Code identification step include：
(51) image preprocessing, pretreatment include that Gaussian Blur eliminates picture noise, gray processing removes invalid colouring information；
(52) License Plate positions license plate using strategy from coarse to fine, so that License Plate adapts to roadside
Complex environment quickly navigates to area-of-interest.Rough localization method is：Headstock or the tailstock are positioned, because license plate is to include
In the two regions, ROI is limited within the scope of coarse positioning, carries out next step accurate positioning；Accurate positioning method is：
The result images of edge detection are carried out binaryzation by sobel operator edge detection method, and then closed operation is extracted profile, obtained
Minimum circumscribed rectangle screens license plate candidate area；
(53) training license plate discrimination model waits segment to the license plate navigated in (52) and predicts judge whether they are vehicle
Board region is to remain, otherwise gives up；
(54) license plate deflection is corrected, and whether within the preset range license plate rectangular area deflection is judged, otherwise to the rectangle
Region is rotated, deflection correction；
(55) Character segmentation carries out Character segmentation to license plate image using sciagraphy；
(56) training CNN model, identifies the character segment after segmentation；
(57) recognition result obtains digital number plate, as parking vehicle unique identifier.
6. the curb parking charge management method according to right 1 based on Video Analysis Technology, which is characterized in that step
(7) it obtains leaving virtual coil vehicle number license plate number, by the vehicle unique identifier in the number inquiry database, such as
Fruit inquires to obtain as a result, then representing a whole set of behavior of vehicle parking completion；If not obtaining query result, this vehicle is deleted
Record.
7. the curb parking charge management method according to right 1 based on Video Analysis Technology, which is characterized in that this method
Using Video Analysis Technology and virtual coil is preset, obtained information and effect includes：Vehicles while passing parking area it is quiet
State image is put to the proof as curb parking toll administration, time of vehicles while passing parking area, vehicle license plate number as vehicle
The necessary information of Parking Fee is generated, these information are realized enough automates unattended curb parking charging managementing mode.
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Application publication date: 20181130 |