CN103914682A - Vehicle license plate recognition method and system - Google Patents
Vehicle license plate recognition method and system Download PDFInfo
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- CN103914682A CN103914682A CN201310007139.4A CN201310007139A CN103914682A CN 103914682 A CN103914682 A CN 103914682A CN 201310007139 A CN201310007139 A CN 201310007139A CN 103914682 A CN103914682 A CN 103914682A
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Abstract
The invention discloses a vehicle license plate recognition method and system. The vehicle license plate recognition method comprises the steps that A, when the situation that a vehicle passes on the site is detected, a video image of a license plate of the vehicle is acquired; B, the acquired video image is processed, whether a license plate number can be automatically recognized through the processed video image or not is judged, if not, the step C is executed, and if yes, the step E is executed; C, the acquired video image is sent to an operating terminal; D, the received video image is displayed by the operating terminal, and a license plate number input by an operator according to the displayed video image is received; E, the license plate number is recorded and stored. The invention further provides the vehicle license plate recognition system. By the implementation of the technical scheme, the vehicle license plate recognition method and system increase the correct recognition rate of the license plate numbers and are more reasonable in practical application.
Description
Technical field
The present invention relates to image recognition technology field, especially relate to a kind of licence plate recognition method and system.
Background technology
Registration number is unique " identity " mark of vehicle, and licence plate automatic identification technology can be realized automatic registration and the checking of automobile " identity " in the situation that automobile does not make any changes.License plate recognition technology (Vehicle License Plate Recognition, VLPR) refers to and the vehicle on monitored road surface can be detected and automatically extract the technology that vehicle license information (containing Chinese character, English alphabet, arabic numeral and number plate color) is processed.Car plate identification is one of important component part in modern intelligent transportation system, applies very extensive.It is taking technology such as Digital Image Processing, pattern-recognition, computer visions as basis, and vehicle image or video sequence to shot by camera are analyzed, and obtain the unique number-plate number of each automobile, thus the identifying of completing.Can realize parking lot management, magnitude of traffic flow control index measurement, vehicle location, automobile burglar, high way super speed robotization supervision, electronic eye used for catching red light runner, toll station etc. function by some subsequent treatment means.
But there is following defect in existing technology: stained, fuzzy at license plate, block, or in weather no good (﹑ ice hail ﹑ dense fog etc. snows) situation, discrimination can be lower or can not identify time, existing system does not have treatment mechanism, and therefore correct recognition rata is not high.
Summary of the invention
The technical problem to be solved in the present invention is, for the not high defect of above-mentioned number-plate number correct recognition rata of prior art, provides licence plate recognition method and system that a kind of correct recognition rata is high.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of licence plate recognition method, comprising:
A. there is vehicle at the scene that ought detect through out-of-date, the car plate of vehicle is carried out to the collection of video image;
B. gathered video image is processed, and judged whether from video image after treatment, to automatically identify the number-plate number, if not, perform step C; If so, perform step E;
C. gathered video image is sent to operating terminal;
D. operating terminal shows the video image receiving, and receives the number-plate number that operating personnel input according to shown video image;
E. record and preserve the number-plate number.
In licence plate recognition method of the present invention, described step D for: operating terminal shows the video image receiving, and ejects dialog box, then receives the number-plate number that operating personnel input in described dialog box according to shown video image.
In licence plate recognition method of the present invention, in described steps A, detect whether there is vehicle process by following at least one mode:
Detect whether there is vehicle process by buried coil;
Detect whether there is vehicle process by infrared detector;
Whether there is vehicle process by detections of radar;
Detect whether there is vehicle process by video camera.
In licence plate recognition method of the present invention, in described step B, the step that gathered video image is processed comprises:
B1. in gathered video image, orient the position of license plate image;
B2. described license plate image is carried out to Character segmentation;
B3. respectively each character is identified.
In licence plate recognition method of the present invention, described steps A is: when detecting that there is vehicle at gateway, parking lot place through out-of-date, carries out the collection of video image to the car plate of vehicle;
Described step e is: record and preserve the number-plate number, and the described vehicle of letting pass.
The present invention also constructs a kind of Vehicle License Plate Recognition System, and comprise server, operating terminal and be arranged on on-the-spot vehicle equipment, video image acquisition equipment, and, described server comprises processing module and logging modle, described operating terminal comprises display module and load module, wherein
Whether described vehicle equipment, have vehicle process for detection of scene;
Described video image acquisition equipment, for having vehicle at the scene of detecting through out-of-date, carries out the collection of video image to the car plate of vehicle;
Described processing module, for gathered video image is processed, and judges whether from video image after treatment, to automatically identify the number-plate number; And in the time that the number-plate number can be automatically identified, the number-plate number identifying is sent to logging modle; In the time that the number-plate number can not be automatically identified, gathered video image is sent to operating terminal;
Described display module, for showing received video image;
Described load module, the number-plate number of inputting according to shown video image for receiving operating personnel;
Described logging modle, the number-plate number receiving for recording and preserve the number-plate number that described processing module automatically identifies or described load module.
In Vehicle License Plate Recognition System of the present invention, described display module, also, in the time showing the video image receiving, ejects dialog box;
Described load module, the number-plate number of inputting in described dialog box according to shown video image for receiving operating personnel.
In Vehicle License Plate Recognition System of the present invention, described vehicle equipment comprises at least one in following: buried coil, infrared detector, detections of radar, video camera.
In Vehicle License Plate Recognition System of the present invention, described processing module comprises:
Positioning unit, for orienting the position of license plate image at gathered video image;
Cutting unit, for carrying out Character segmentation to described license plate image;
Recognition unit, for identifying each character respectively.
In Vehicle License Plate Recognition System of the present invention, described vehicle equipment, video image acquisition equipment are arranged on the gateway place in parking lot.
Implement technical scheme of the present invention, there is following beneficial effect:
1. improved the correct recognition rata of the number-plate number, the correct recognition rata that makes the number-plate number is 100%;
2. manual processing links does not have clear and definite requirement of real time to artificial treatment time, place, and operating personnel can operate whenever and wherever possible, more reasonable in actual applications.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the process flow diagram of licence plate recognition method embodiment mono-of the present invention;
Fig. 2 is the process flow diagram of step B preferred embodiment in Fig. 1;
Fig. 3 is the logical diagram of Vehicle License Plate Recognition System embodiment mono-of the present invention;
Fig. 4 is the logical diagram of processing module preferred embodiment in Fig. 3.
Embodiment
The process flow diagram of licence plate recognition method embodiment mono-of the present invention as shown in Figure 1, this licence plate recognition method comprises:
A. there is vehicle at the scene that ought detect through out-of-date, the car plate of vehicle is carried out to the collection of video image, and whether in this step, can carry out Test Field by one or more equipment in buried coil, infrared detector, radar, video camera has vehicle process.In addition, can carry out by DVR, video camera the video image of collection vehicle;
B. gathered video image is processed, and judged whether from video image after treatment, to automatically identify the number-plate number, if not, perform step C; If so, perform step E, in this step, it should be noted that, when collecting after the video image of car plate, the mode that preferentially adopts system automatically to identify is identified the number-plate number, to save time.But, when car plate have stained, fuzzy, block, or weather is perhaps in no good situation, system cannot automatically identify the number-plate number according to gathered video image, now, should perform step C;
C. gathered video image is sent to operating terminal, operating terminal is for example mobile terminal, computer, operation touch screen etc., also can be background monitoring center;
D. operating terminal shows the video image receiving, and receive the number-plate number that operating personnel input according to shown video image, in this step, preferably, operating terminal is in the time showing the video image receiving, one of automatic spring is for operating personnel's inputting license plate number dialog box, and operating personnel check after video image, just can be in dialog box inputting license plate number.Also it should be noted that the present invention does not limit the time of operating personnel's inputting license plate number, place, can process whenever and wherever possible, more reasonable in actual applications;
E. record and preserve the number-plate number.
In a preferred embodiment of licence plate recognition method of the present invention, the step that the video image to gathered of step B is processed comprises:
B1. in gathered video image, orient the position of license plate image;
B2. described license plate image is carried out to Character segmentation;
B3. respectively each character is identified, specifically can be comprised the extraction of feature, the structure of template.
Licence plate recognition method in above-described embodiment can be used on parking lot management, magnitude of traffic flow control index measurement, vehicle location, automobile burglar, high way super speed robotization supervision, electronic eye used for catching red light runner, the occasions such as toll station, for example, in the method for parking lot management, in the time that vehicle is come in and gone out parking lot, the vehicle equipment at gateway place can detect whether there is vehicle process, when having detected that vehicle is through out-of-date, the video image of collection vehicle, then gathered video image is processed, in the time automatically identifying the number-plate number, record and preserve the number-plate number, in the time can not automatically identifying the number-plate number, video image is sent to operating terminal, by operating personnel, according to video image inputting license plate number, then, system log (SYSLOG) is also preserved the number-plate number, and then the vehicle of can letting pass.
Fig. 3 is the logical diagram of Vehicle License Plate Recognition System embodiment mono-of the present invention, this Vehicle License Plate Recognition System comprises: vehicle equipment 10, video image acquisition equipment 20, server 30 and operating terminal 40, vehicle equipment 10, video image acquisition equipment 20 are arranged on scene.Server 30 comprises processing module 31 and logging modle 32, and operating terminal 40 comprises display module 41 and load module 42.Wherein, whether vehicle equipment 10 has vehicle process for detection of scene, and vehicle equipment 10 for example comprises at least one in following: buried coil, infrared detector, detections of radar, video camera.Video image acquisition equipment 20, for having vehicle at the scene of detecting through out-of-date, carries out the collection of video image to the car plate of vehicle, video image acquisition module 20 is for example DVR, video camera.Processing module 31 is for gathered video image is processed, and judges whether from video image after treatment, to automatically identify the number-plate number; And in the time that the number-plate number can be automatically identified, the number-plate number identifying is sent to logging modle 32; In the time that the number-plate number can not be automatically identified, gathered video image is sent to operating terminal 40.Display module 41, for showing received video image, preferably, in the time showing the video image of car plate, also shows a dialog box for operating personnel's inputting license plate number.The number-plate number that load module 42 is inputted according to shown video image for receiving operating personnel, for example, can be in dialog box inputting license plate number.The number-plate number that logging modle 32 receives for the number-plate number that records and preserve processing module 31 and automatically identify or load module 42.
Fig. 4 is the logical diagram of processing module preferred embodiment in Fig. 3, this processing module 31 comprises the positioning unit 311, cutting unit 312 and the recognition unit 313 that are connected, wherein, positioning unit 311 is for orienting the position of license plate image at gathered video image; Cutting unit 312 is for carrying out Character segmentation to described license plate image; Recognition unit 313 is for identifying each character respectively.
Vehicle License Plate Recognition System of the present invention can be applicable to the occasions such as parking lot management, magnitude of traffic flow control index measurement, vehicle location, automobile burglar, high way super speed robotization supervision, electronic eye used for catching red light runner, toll station, for example, in managing system of car parking, vehicle equipment, video image acquisition equipment are arranged on the gateway place in parking lot, when recording and preserve after the number-plate number, this vehicle of letting pass.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes, combination and variation.Within the spirit and principles in the present invention all, any amendment of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present invention.
Claims (10)
1. a licence plate recognition method, is characterized in that, comprising:
A. there is vehicle at the scene that ought detect through out-of-date, the car plate of vehicle is carried out to the collection of video image;
B. gathered video image is processed, and judged whether from video image after treatment, to automatically identify the number-plate number, if not, perform step C; If so, perform step E;
C. gathered video image is sent to operating terminal;
D. operating terminal shows the video image receiving, and receives the number-plate number that operating personnel input according to shown video image;
E. record and preserve the number-plate number.
2. licence plate recognition method according to claim 1, it is characterized in that, described step D for: operating terminal shows the video image receiving, and ejects dialog box, then receives the number-plate number that operating personnel input in described dialog box according to shown video image.
3. licence plate recognition method according to claim 1, is characterized in that, in described steps A, detects whether there is vehicle process by following at least one mode:
Detect whether there is vehicle process by buried coil;
Detect whether there is vehicle process by infrared detector;
Whether there is vehicle process by detections of radar;
Detect whether there is vehicle process by video camera.
4. licence plate recognition method according to claim 1, is characterized in that, in described step B, the step that gathered video image is processed comprises:
B1. in gathered video image, orient the position of license plate image;
B2. described license plate image is carried out to Character segmentation;
B3. respectively each character is identified.
5. licence plate recognition method according to claim 1, is characterized in that,
Described steps A is: when detecting that there is vehicle at gateway, parking lot place through out-of-date, carries out the collection of video image to the car plate of vehicle;
Described step e is: record and preserve the number-plate number, and the described vehicle of letting pass.
6. a Vehicle License Plate Recognition System, is characterized in that, comprises server, operating terminal and is arranged on on-the-spot vehicle equipment, video image acquisition equipment, and described server comprises processing module and logging modle, described operating terminal comprises display module and load module, wherein
Whether described vehicle equipment, have vehicle process for detection of scene;
Described video image acquisition equipment, for having vehicle at the scene of detecting through out-of-date, carries out the collection of video image to the car plate of vehicle;
Described processing module, for gathered video image is processed, and judges whether from video image after treatment, to automatically identify the number-plate number; And in the time that the number-plate number can be automatically identified, the number-plate number identifying is sent to logging modle; In the time that the number-plate number can not be automatically identified, gathered video image is sent to operating terminal;
Described display module, for showing received video image;
Described load module, the number-plate number of inputting according to shown video image for receiving operating personnel;
Described logging modle, the number-plate number receiving for recording and preserve the number-plate number that described processing module automatically identifies or described load module.
7. Vehicle License Plate Recognition System according to claim 6, is characterized in that, described display module also, in the time showing the video image receiving, ejects dialog box;
Described load module, the number-plate number of inputting in described dialog box according to shown video image for receiving operating personnel.
8. Vehicle License Plate Recognition System according to claim 6, is characterized in that, described vehicle equipment comprises at least one in following: buried coil, infrared detector, detections of radar, video camera.
9. Vehicle License Plate Recognition System according to claim 6, is characterized in that, described processing module comprises:
Positioning unit, for orienting the position of license plate image at gathered video image;
Cutting unit, for carrying out Character segmentation to described license plate image;
Recognition unit, for identifying each character respectively.
10. Vehicle License Plate Recognition System according to claim 6, is characterized in that, described vehicle equipment, video image acquisition equipment are arranged on the gateway place in parking lot.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310007139.4A CN103914682A (en) | 2013-01-09 | 2013-01-09 | Vehicle license plate recognition method and system |
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| CN201310007139.4A CN103914682A (en) | 2013-01-09 | 2013-01-09 | Vehicle license plate recognition method and system |
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Cited By (10)
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| CN105139481A (en) * | 2015-08-13 | 2015-12-09 | 石立公 | Vehicle speaker recognition system |
| CN106448184A (en) * | 2016-12-15 | 2017-02-22 | 深圳市捷顺科技实业股份有限公司 | Identifying method of Vehicles and exit of vehicles |
| CN107833466A (en) * | 2017-10-13 | 2018-03-23 | 天津市普迅电力信息技术有限公司 | Electric automobile charging station intelligent parking integral system |
| CN108876943A (en) * | 2018-07-09 | 2018-11-23 | 北京悦畅科技有限公司 | Parking lot appearance follow the bus behavior management-control method and device |
| WO2018227720A1 (en) * | 2017-06-16 | 2018-12-20 | 深圳市盛路物联通讯技术有限公司 | Road and bridge toll collection method and apparatus |
| CN109801498A (en) * | 2017-11-16 | 2019-05-24 | 北京筑梦园科技有限公司 | Licence plate recognition methods a kind of while using a variety of triggering modes |
| CN110490031A (en) * | 2018-05-15 | 2019-11-22 | 武汉斗鱼网络科技有限公司 | A kind of general digital knows method for distinguishing, storage medium, electronic equipment and system |
| WO2020211658A1 (en) * | 2019-04-17 | 2020-10-22 | 阿里巴巴集团控股有限公司 | Trigger detection method, apparatus and system |
| CN113284349A (en) * | 2021-07-23 | 2021-08-20 | 深圳市赛菲姆科技有限公司 | License plate recognition method and system |
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| CN104573637A (en) * | 2014-12-18 | 2015-04-29 | 厦门翼歌软件科技有限公司 | Multi-camera-based vehicle license plate recognition method |
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| CN108876943A (en) * | 2018-07-09 | 2018-11-23 | 北京悦畅科技有限公司 | Parking lot appearance follow the bus behavior management-control method and device |
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| CN113284349A (en) * | 2021-07-23 | 2021-08-20 | 深圳市赛菲姆科技有限公司 | License plate recognition method and system |
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Application publication date: 20140709 |