CN203165216U - License plate recognition device - Google Patents
License plate recognition device Download PDFInfo
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- CN203165216U CN203165216U CN 201220684711 CN201220684711U CN203165216U CN 203165216 U CN203165216 U CN 203165216U CN 201220684711 CN201220684711 CN 201220684711 CN 201220684711 U CN201220684711 U CN 201220684711U CN 203165216 U CN203165216 U CN 203165216U
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- car plate
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Abstract
The utility model discloses a license plate recognition device. The device comprises at least two cameras. One camera is assigned to be a host and other cameras are assigned to be slave machines. The host is connected with each slave machine through a network. When a vehicle is monitored to be driven into a monitoring field, signals are sent to the host and each slave machine. After receiving the signals, the host and each slave machine shoot license plate images of the vehicle from different angles and acquire shooting information according to the license plate images. Each slave machine sends the acquired shooting information to the host through the network. The host carries out arbitration on the shooting information acquired by the host itself and the received shooting information sent by each slave machine and outputs the license plate recognition information of the vehicle to the monitoring field according to an arbitration result. By using the device of the utility model, problems of a large license plate rotation angle, license plate distortion and the like generated when the single camera is used to carry out the license plate recognition are avoided; a recognition rate and adaptability of the license plate can be increased; restriction conditions of the license plate recognition can be reduced.
Description
Technical field
The utility model relates to technical field of image processing, relates in particular to a kind of car plate recognition device.
Background technology
Car plate identification is based on technology such as Digital Image Processing, pattern-recognition, computer visions, and vehicle image or the video sequence of shot by camera are analyzed, and obtains the unique number-plate number of each automobile, thus the identifying of finishing.Car plate identification is one of important component part in the modern intelligent transportation system, is the requisite technological means of road monitoring, and it is used and also obtains the large tracts of land penetration and promotion.At present, in the practical application of license plate recognition technology, video camera at first obtains an image of discernible car plate clearly, there is strict demand the installation site of video camera to the angle that road width, runway length and vehicle travel, otherwise the picture of shooting, car plate can produce the very big anglec of rotation, even serious distortion takes place, and influences the discrimination of car plate.
Under the situation more clear at picture shooting, that the car plate anglec of rotation little, the car plate distortion is not serious, car plate is identified present discrimination still than higher, but because many practical application, when the separate unit video camera is taken pictures identification, it is big the car plate anglec of rotation unavoidably to occur, the problem of car plate distortion.Fig. 1 is car plate identification synoptic diagram, as shown in Figure 1, desirable direction of traffic is the travel direction of B car, but can not guarantee the degree of depth of access road in the actual environment practical application, have A car and the oblique situation of turning round and sailing into of C car greatly may take place, if video camera is installed in the left side, then the A car is sailed into the vehicle of direction, the picture car plate anglec of rotation that video camera is captured and distortion will be bigger, if video camera is installed in the right side, then sail the vehicle of direction into for the C car, the car plate anglec of rotation taken by video camera and distortion will be bigger.
People are by adjusting the installation site of video camera at present, artificial restriction curb-to-curb width, increasing the guiding track makes car by the direction running of setting, etc. these measures, can both play effect to a certain extent, but, increased difficulty of construction and cost again, so be that some are feasible but be not optimum solution.
The utility model content
The purpose of this utility model is to propose a kind of device that carries out car plate identification by multiple cameras, can improve discrimination and the adaptability of car plate, can reduce the restrictive condition of car plate identification.
Car plate recognition device described in the utility model is used for being installed in the monitoring field and carries out vehicle monitoring, comprising:
At least two video cameras, wherein a video camera is designated as main frame, and other video cameras are designated as slave, and described main frame and each slave pass through network connection;
When described monitoring field has monitored vehicle when sailing into, send signal to described main frame and each slave, described main frame and each slave receive the image of the car plate of taking described vehicle behind the described signal from different perspectives and according to the Image Acquisition photographing information of described car plate, each slave sends to described main frame by network with the photographing information of obtaining;
The photographing information that the photographing information that described main frame obtains self and the slave that receives send is arbitrated, according to the car plate identifying information of described arbitration result to a described monitoring described vehicle of output.
Further, whether described monitoring field has vehicle to sail into by the ground induction coil monitoring, and when vehicle sailed into, described ground induction coil sent signal to described main frame and each slave;
Perhaps, whether described monitoring field has vehicle to sail into by the monitoring of infrared monitoring instrument, and when vehicle sailed into, described infrared monitoring instrument sent signal to described main frame and each slave.
Further, described car plate recognition device comprises two video cameras, described two video cameras lay respectively at the left and right sides of described monitoring field, described two video cameras overhead highly all are not less than 1.6 meters and be not more than 3.5 meters, and described two video cameras described ground induction coil of distance or described infrared monitoring instrument distance are not less than 4 meters and be not more than 8 meters.
Further, described two video cameras overhead highly are 1.6 meters.
Perhaps, described car plate recognition device comprises three video cameras, wherein two video cameras lay respectively at the described left and right sides of monitoring the field, distance described ground induction coil or infrared monitoring instrument distance is not less than 4 meters and be not more than 8 meters, another position for video camera is in left side or the right side of described monitoring, and the described ground induction coil of distance or infrared monitoring instrument distance are not less than 1.5 meters and be not more than 2 meters.
Further, described photographing information comprises the parameter of license plate number and license plate image, and the parameter of wherein said license plate image comprises the degree of confidence of the quality of license plate image, the anglec of rotation, distortion degree and/or described license plate number.
Further, from different perspectives the car plate of described vehicle is taken simultaneously after described main frame and each slave receive described signal.
Problems such as the excessive and car plate distortion of the car plate anglec of rotation that the utility model has occurred when having avoided using single camera to carry out car plate identification can improve discrimination and the adaptability of car plate, can reduce the restrictive condition of car plate identification.
Description of drawings
Fig. 1 is car plate identification synoptic diagram in the background technology;
Fig. 2 is the utility model specific embodiment one described car plate recognition device structure meaning intention;
Fig. 3 is the scheme of installation of the utility model specific embodiment two described car plate recognition devices.
Embodiment
Further specify the technical solution of the utility model below in conjunction with accompanying drawing and by embodiment.
Embodiment one
The utility model is by installing a plurality of video cameras, carrying out car plate respectively from different perspectives takes, further, can capture same car plate simultaneously, when driving vehicle entered with direction from different perspectives, the function that can both guarantee to make a video recording was captured clearly and can be identified the car plate picture, respectively from video camera the information of taking is sent to main camera, main camera is taked intelligent arbitration algorithm, and picture quality and the recognition result of each video camera are done analysis, exports final shooting results.
Fig. 2 is the utility model specific embodiment one described car plate recognition device structure meaning intention, as shown in Figure 2, the described car plate recognition device of present embodiment comprises N+1 video camera, wherein a video camera is designated as main frame, other N platform video cameras are designated as slave, described main frame and each slave are mainly used in each slave and send photographing information to main frame by network connection.
Whether described monitoring field has vehicle to sail into by the ground induction coil monitoring, and when vehicle sailed into, described ground induction coil sent signal to described main frame and each slave.
Perhaps, whether described monitoring field has vehicle to sail into by the monitoring of infrared monitoring instrument, and when vehicle sailed into, described infrared monitoring instrument sent signal to described main frame and each slave.
Described main frame and each slave receive the image of the car plate of taking described vehicle behind the described signal from different perspectives and according to the Image Acquisition photographing information of described car plate, each slave sends to described main frame by network with the photographing information of obtaining.
Wherein, main frame and the concrete style of shooting of each slave are decided according to the concrete function of device, can from different perspectives same vehicle be taken the same time, also can asynchronously take, for example, if the monitoring scene is the individual detour section of turning right, then can allow left side camera take earlier, relief right side video camera is taken.The number of times that each video camera is taken same vehicle can be identical, also can be different, can be once, twice or repeatedly.
Described photographing information can be the parameter of license plate number and/or license plate image, also can directly be the license plate image of taking, and the parameter of wherein said license plate image can be the degree of confidence of quality, the anglec of rotation, distortion degree and/or the described license plate number of license plate image.
The photographing information that main camera obtains self and the photographing information from the video camera transmission that receives are arbitrated, to the described recognition result of monitoring after arbitration is exported in the field.
Embodiment two
Fig. 3 present embodiment has been described a kind of mounting means of car plate recognition device, as shown in Figure 3, described car plate recognition device comprises two video cameras, described two video cameras lay respectively at the left and right sides of described monitoring field, because video camera glare phenomenon occurs when overhead highly too low easily, the license plate image of shooting when too high is modified to short flat-shaped easily.So video camera overhead height all should remain on more than or equal to 1.6 meters and smaller or equal to 3.5 meters, if adopt the support mounting means, described height is preferably 1.6 meters, if adopt indoor furred ceiling to install, then described height is preferably 2.2 meters.
When whether described monitoring field had vehicle to sail into by the ground induction coil monitoring, the center of the described ground induction coil of described two video cameras distance should remain between 4 to 8 meters, is preferably 4.5 meters.
Perhaps, when whether described monitoring field had vehicle to sail into by the monitoring of infrared monitoring instrument, the center of the described ground induction coil of described two video cameras distance should remain between 4 to 8 meters, is preferably 4.5 meters.
But, may occur because traffic density is excessive, when detecting vehicle and enter monitoring by ground induction coil or infrared survey instrument prison, the spacing of this car and front is near excessively, this car plate is lived by the car bumper of front and the video camera of the left and right sides all can't identify the situation of this car car plate, in order to plant car plate recognition failures under the situation in the side of preventing, can increase a video camera on this basis again, be arranged at 1.5 meters to 2 meters in center or infrared monitoring instrument the place ahead of described ground induction coil, like this can just be when car be just monitored by ground induction coil or infrared monitoring instrument shooting at close range to this car car plate.
The utility model embodiment one and embodiment two described car plate recognition devices, in actual applications, basically can solve the situation that the car plate anglec of rotation is big and the car plate distortion seriously can not be identified, though also can increase cost and construction, but increase limited, and to the restriction meeting used still less, the practicality of Related product can be greatly improved thereupon.Solved single camera identification, under some wide-angle situation, situation about can't identify has fully also reduced simultaneously curb-to-curb width, vehicle travelled and has ajusted the travel requirement of angle of distance, vehicle, has improved adaptability and the practicality of product.
In a word, problems such as the excessive and car plate distortion of the car plate anglec of rotation that the utility model has occurred when having avoided using single camera to carry out car plate identification can improve discrimination and the adaptability of car plate, can reduce the restrictive condition of car plate identification.
The above only is preferred embodiment of the present utility model, and is in order to limit the utility model, not all within spirit of the present utility model and principle, any modification of doing, is equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (6)
1. a car plate recognition device is used for being installed in the monitoring field and carries out vehicle monitoring, it is characterized in that, comprising:
At least two video cameras, wherein a video camera is designated as main frame, and other video cameras are designated as slave, and described main frame and each slave pass through network connection;
When described monitoring field has monitored vehicle when sailing into, send signal to described main frame and each slave, described main frame and each slave receive the image of the car plate of taking described vehicle behind the described signal from different perspectives and according to the Image Acquisition photographing information of described car plate, each slave sends to described main frame by network with the photographing information of obtaining.
2. car plate recognition device as claimed in claim 1 is characterized in that, whether described monitoring field has vehicle to sail into by the ground induction coil monitoring, and when vehicle sailed into, described ground induction coil sent signal to described main frame and each slave;
Perhaps, whether described monitoring field has vehicle to sail into by the monitoring of infrared monitoring instrument, and when vehicle sailed into, described infrared monitoring instrument sent signal to described main frame and each slave.
3. car plate recognition device as claimed in claim 2, it is characterized in that, described car plate recognition device comprises two video cameras, described two video cameras lay respectively at the left and right sides of described monitoring field, described two video cameras overhead highly all are not less than 1.6 meters and be not more than 3.5 meters, and described two video cameras described ground induction coil of distance or described infrared monitoring instrument distance are not less than 4 meters and be not more than 8 meters.
4. car plate recognition device as claimed in claim 3 is characterized in that, described two video cameras overhead highly are 1.6 meters.
5. car plate recognition device as claimed in claim 2, it is characterized in that, described car plate recognition device comprises three video cameras, wherein two video cameras lay respectively at the described left and right sides of monitoring the field, distance described ground induction coil or infrared monitoring instrument distance is not less than 4 meters and be not more than 8 meters, another position for video camera is in left side or the right side of described monitoring, and the described ground induction coil of distance or infrared monitoring instrument distance are not less than 1.5 meters and be not more than 2 meters.
6. car plate recognition device as claimed in claim 1 or 2 is characterized in that, from different perspectives the car plate of described vehicle is taken simultaneously after described main frame and each slave receive described signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220684711 CN203165216U (en) | 2012-12-12 | 2012-12-12 | License plate recognition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220684711 CN203165216U (en) | 2012-12-12 | 2012-12-12 | License plate recognition device |
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| CN203165216U true CN203165216U (en) | 2013-08-28 |
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| CN 201220684711 Expired - Lifetime CN203165216U (en) | 2012-12-12 | 2012-12-12 | License plate recognition device |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106331451A (en) * | 2016-08-23 | 2017-01-11 | 安徽联合安全科技有限公司 | VIN (Vehicle Identification Number) code encryption and rubbing device based on double positioning of Bluetooth and ultrasound waves |
| CN109544707A (en) * | 2017-09-18 | 2019-03-29 | 武汉万德智新科技股份有限公司 | Parking lot enters and leaves intelligence control system and method |
| CN110070723A (en) * | 2018-01-23 | 2019-07-30 | 浙江宇视科技有限公司 | The method, apparatus and system of entrance vehicle identification |
| CN111696237A (en) * | 2019-03-14 | 2020-09-22 | 富鼎电子科技(嘉善)有限公司 | Access control device, access control method and storage equipment |
| CN113706878A (en) * | 2020-05-20 | 2021-11-26 | 宏碁智通股份有限公司 | License plate shooting system and license plate shooting method |
| US11188776B2 (en) | 2019-10-26 | 2021-11-30 | Genetec Inc. | Automated license plate recognition system and related method |
| US11367267B2 (en) | 2018-02-08 | 2022-06-21 | Genetec Inc. | Systems and methods for locating a retroreflective object in a digital image |
| US12125234B2 (en) | 2022-10-12 | 2024-10-22 | Genetec Inc. | Automated license plate recognition system and related method |
-
2012
- 2012-12-12 CN CN 201220684711 patent/CN203165216U/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106331451A (en) * | 2016-08-23 | 2017-01-11 | 安徽联合安全科技有限公司 | VIN (Vehicle Identification Number) code encryption and rubbing device based on double positioning of Bluetooth and ultrasound waves |
| CN109544707A (en) * | 2017-09-18 | 2019-03-29 | 武汉万德智新科技股份有限公司 | Parking lot enters and leaves intelligence control system and method |
| CN109544707B (en) * | 2017-09-18 | 2021-06-01 | 武汉万德智新科技股份有限公司 | Intelligent control system and method for access of parking lot |
| CN110070723A (en) * | 2018-01-23 | 2019-07-30 | 浙江宇视科技有限公司 | The method, apparatus and system of entrance vehicle identification |
| US11367267B2 (en) | 2018-02-08 | 2022-06-21 | Genetec Inc. | Systems and methods for locating a retroreflective object in a digital image |
| US11830256B2 (en) | 2018-02-08 | 2023-11-28 | Genetec Inc. | Systems and methods for locating a retroreflective object in a digital image |
| CN111696237A (en) * | 2019-03-14 | 2020-09-22 | 富鼎电子科技(嘉善)有限公司 | Access control device, access control method and storage equipment |
| US11188776B2 (en) | 2019-10-26 | 2021-11-30 | Genetec Inc. | Automated license plate recognition system and related method |
| US12067743B2 (en) | 2019-10-26 | 2024-08-20 | Genetec Inc. | Automated license plate recognition system and related method |
| CN113706878A (en) * | 2020-05-20 | 2021-11-26 | 宏碁智通股份有限公司 | License plate shooting system and license plate shooting method |
| CN113706878B (en) * | 2020-05-20 | 2023-02-28 | 宏碁智通股份有限公司 | License plate shooting system and license plate shooting method |
| US12125234B2 (en) | 2022-10-12 | 2024-10-22 | Genetec Inc. | Automated license plate recognition system and related method |
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Granted publication date: 20130828 |