CN102881169B - Fake-licensed car detection method - Google Patents
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- CN102881169B CN102881169B CN201210361859.6A CN201210361859A CN102881169B CN 102881169 B CN102881169 B CN 102881169B CN 201210361859 A CN201210361859 A CN 201210361859A CN 102881169 B CN102881169 B CN 102881169B
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Abstract
The invention discloses a fake-licensed car detection method, which comprises the following steps of: A) detecting information of passing vehicles at a detection point; B) acquiring the shortest travel time between every two adjacent detection points in real time according to real-time road condition information; C) acquiring time difference of a vehicle with the same license number between the two detection points; D) calculating the shortest travel time between the two detection points in the step C); E) correcting the shortest travel time in the step D); and F) if the time difference of the vehicle with the same license number between the two acquisition points is shorter than the corrected shortest travel time, judging that the vehicle is suspected to be a fake-licensed car. The fake-licensed car detection method is not limited by basic information of the vehicle, the shortest travel time between the two detection points is dynamically updated by detecting the real-time road condition information, and the shortest travel time is acquired through error correction aiming at the license recognition accuracy, and the fake-licensed car detection accuracy is high.
Description
Technical field
The present invention relates to technical field of intelligent traffic, specifically, relate to the detection method of the identical fake-licensed car of a kind of information of vehicles.
Background technology
Fake-licensed car refers to the vehicle illegally applying mechanically other people automobile license plate.In recent years, along with the fast development of economy, Urban vehicles poputation is growing, and thing followed fake-licensed car phenomenon is spread unchecked increasingly.The collection of national set-fee has not only been evaded in deck behavior, also compromises the interests of car owner, has also upset normal traffic order simultaneously, has brought certain labile factor to society.How effectively to identify that fake-licensed car becomes a difficult problem of vehicle supervision department.
At present, the method detecting fake-licensed car mainly comprises the following two kinds:
One, realized by comparison information of vehicles, identify the information of vehicles through this check point specifically by checkout equipment, and the specifying information of vehicle is comprised vehicle, body color, Che Biao etc. compare with the information of vehicles of identical brand number in car Guan Ku.If the information both comparison finds is different, then think that this car is fake-licensed car.But the method is only applicable to the different fake-licensed car of information of vehicles.But the current fake-licensed car overwhelming majority has the vehicle identical with former car, car mark and body color, is therefore difficult to identify above-mentioned fake-licensed car by the method.In addition, being identified in of vehicle, car mark and body color is technically still immature, and therefore applying the method also has certain difficulty technically.
Two, the principle in two places can not be appeared at according to same vehicle simultaneously.Being specially the vehicle calculating identical number plate and whether being less than the shortest time needed for these two control points of process preset in the mistiming that any two control points occur, as being less than this shortest time, then judging that this car plate has deck suspicion." mistiming " method mainly between any two check points, manually should set threshold value now, threshold size is by the interference of human factor, and threshold value detects fake-licensed car under being fixedly not suitable for actual traffic state.Such as the patent No. is: 200910058943.9, and patent name is: a kind of fake-licensed car detection method based on License Plate Identification and gridding supervision, disclose a kind of detection method of fake-licensed car, this detection method is the shortest time manually preset through needed for two control points, and this value is fixed, then same road segment is under different traffic, the shortest time being actually passed through two control points may fluctuate to some extent, the particularly peak period on and off duty in city, there are major traffic accidents etc. when causing traffic congestion situation, the shortest time being actually passed through two control points may be far longer than the shortest time manually preset, thus, if now also adopt the shortest time manually preset as fiducial value, then can there is undetected situation.Equally, the patent No. is: 200910051845.2, and patent name is: a kind of unlicensed motor vehicles recognition system and method, also exist the problems referred to above.
Summary of the invention
The invention provides a kind of detection method of fake-licensed car, solve in prior art fake-licensed car detection method the technical matters manually presetting threshold value and cause Detection accuracy low.
In order to solve the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A detection method for fake-licensed car, comprises the steps:
A) check point detects the information of vehicles of process;
B) according to real-time road condition information, the shortest hourage between all adjacent two check points of Real-time Collection,
For the check point having car data, between adjacent two check points, the shortest hourage is the shortest hourage in actual mistake car data;
Nothing is crossed to the check point of car data, between adjacent two check points, the shortest hourage is the Maximum speed limit between two check point spacing/two check points.
C) mistiming of vehicle between two check points of the same number-plate number is obtained;
D) calculation procedure C) in the shortest hourage between two check points;
E) if step C) in the mistiming of vehicle between two collection points of the same number-plate number be less than step D) in the shortest hourage, then this vehicle is deck suspected vehicles.
Preferably, described step D) in the shortest hourage between two check points be hourage on the shortest path that obtains at shortest path first.
In order to improve deck recognition accuracy, described step e) in first to step D) in the shortest hourage revise, if step C) in the mistiming of vehicle between two collection points of the same number-plate number be less than step D) in the shortest hourage of revising, then this vehicle is deck suspected vehicles.
Preferably, described step e) in the modification method revised the shortest hourage for the shortest hourage × modifying factor.
Further, described modifying factor is Car license recognition accuracy rate.
Preferably, described check point is provided with information of vehicles detecting device.
Compared with prior art, advantage of the present invention and good effect are: the invention has the advantages that not by the constraint of the vehicle essential informations such as vehicle, Che Biao, body color, and the shortest hourage between two check points can be dynamically updated by real-time road condition information, and consider the impact of Car license recognition accuracy rate, adopt error correction to obtain the shortest hourage in error range, to compare with the shortest hourage of point-to-point transmission in error range in the acquisition time difference of point-to-point transmission according to the vehicle of identical brand number and judge whether this vehicle is deck suspected vehicles.The invention solves and the time interval threshold value when two places occur can not set problem in a certain time interval at the vehicle of the same brand number of comparison, decrease the interference of human factor when fake-licensed car detects, improve the discrimination of fake-licensed car, be particularly useful for the vehicle with same model, Che Biao, body color.
After reading the detailed description of embodiment of the present invention by reference to the accompanying drawings, the other features and advantages of the invention will become clearly.
Accompanying drawing explanation
Fig. 1 is the process flow diagram of the specific embodiment of the invention;
Fig. 2 is specific embodiment of the invention check point topology diagram.
Embodiment
Often set manually the shortest hourage through between two check points for vehicle in the detection method of the identical fake-licensed car of existing information of vehicles (vehicle, Che Biao, body color), by interference from human factor, the problem that accuracy in detection is low, the present invention proposes a kind of to carrying out the real time measure the shortest hourage between two check points, real-time update, thus the detection method reducing the fake-licensed car of interference from human factor.The method can greatly improve fake-licensed car recognition accuracy, artificial to participate in less, can widely use, thus effectively hit the illegal activities of deck, the legitimate interests of protection car owner, safeguard civil order.
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in more detail:
As shown in Figure 1: a kind of detection method of fake-licensed car, carry out according to the following steps:
1., according to road network structure and Loop detector layout scheme, set up the topology controlment of check point.At each check point, information of vehicles detecting device is all installed, for detecting the information of vehicles of process.
For convenience of explanation, the present embodiment is for six check points.As shown in Figure 2, in figure, A-F all represents check point.
2. according to real-time road condition information, the shortest hourage between all adjacent two check points of Real-time Collection.
For the check point having car data, between adjacent two check points, the shortest hourage is the shortest hourage in actual mistake car data; Nothing is crossed to the check point of car data, between check point, the shortest hourage adopts theory the shortest hourage (zone distance is divided by the Maximum speed limit in this interval section).The shortest hourage is according to current traffic information real-time update herein.
3. obtain the mistiming of vehicle between two check points of same brand number, detailed process is:
1) at each check point place, real-time grasp shoot is through the vehicle of this check point, to capturing the car picture excessively obtained, the brand number of vehicle and the detailed car data excessively of vehicle can be obtained, comprise check point, acquisition time etc. (this check point is defined as terminal).
Such as, being a collection period with five minutes, supposing that the car information of crossing (except capturing image information) at check point E place from 10:10 to 10:15 is:
E, " Shandong B00001 ", 2012-08-08 10:10:00.
E, " Shandong B00002 ", 2012-08-08 10:11:00.
E, " Shandong B00003 ", 2012-08-08 10:12:00.
…
2) car data is crossed to every bar that current collection period is captured, last check point and acquisition time (this check point is defined as starting point) of searching its process before current time period are in car data buffer zone, the mistiming that the vehicle calculating identical brand number gathers between two check points, and this vehicle is defined as target vehicle.
Suppose that to through check point E, brand number is the target vehicle of " Shandong B00001 ", and the current candid photograph time is that 2012-08-08 10:10:00(is designated as T
e), last time is designated as T at 2012-08-08 10:05:00(
a) through check point A, the mistiming of 2 is T
aE=T
e-T
a=5(minute).
4. zequin is to the shortest hourage of terminal.
The shortest hourage from origin-to-destination is obtained according to the shortest hourage of two check points adjacent in step 2 and shortest path first.Shortest path first mainly contains dijkstra's algorithm, A* algorithm, SPFA algorithm, bellman-ford algorithm etc., belongs to known technology, here repeats no more.
Consider that the shortest hourage of point-to-point transmission can affect by Car license recognition accuracy rate, therefore adopting Car license recognition accuracy rate to carry out revising (check point is daily crosses car data statistical study acquisition to Car license recognition accuracy rate by transferring) the shortest hourage as error effect factor pair, the shortest hourage in error range can be obtained.
Suppose that the shortest hourage utilizing shortest path dijkstra's algorithm to calculate from A to E is 10 minutes, Car license recognition accuracy rate is 80%, then after overcorrect, the shortest hourage of A to E is 8 minutes.
5. comparative analysis draws deck suspected vehicles.
The shortest hourage drawn in the mistiming of target vehicle and step 4 is compared, if the mistiming of target vehicle is less than the shortest hourage, then thinks that target vehicle is deck suspected vehicles.
Target vehicle is 5 minutes in the mistiming of AE point-to-point transmission, is less than 8 minutes the shortest hourages between AE, therefore thinks that brand number be the target vehicle of " Shandong B00001 " is deck suspected vehicles.
Certainly; above-mentioned explanation is not limitation of the present invention; the present invention is also not limited in above-mentioned citing, the change that those skilled in the art make in essential scope of the present invention, remodeling, interpolation or replacement, also should belong to protection scope of the present invention.
Claims (3)
1. a detection method for fake-licensed car, is characterized in that: comprise the steps:
A) check point detects the information of vehicles of process;
B) according to real-time road condition information, the shortest hourage between all adjacent two check points of Real-time Collection,
For the check point having car data, between adjacent two check points, the shortest hourage is the shortest hourage in actual mistake car data;
Nothing is crossed to the check point of car data, between adjacent two check points, the shortest hourage is the Maximum speed limit between two check point spacing/two check points;
C) mistiming of vehicle between two check points of the same number-plate number is obtained;
D) calculation procedure C) in the shortest hourage between two check points;
E) first to step D) in the shortest hourage revise, modification method be the shortest hourage × Car license recognition accuracy rate, if step C) in the mistiming of vehicle between two collection points of the same number-plate number be less than step D) in the shortest hourage of revising, then this vehicle is deck suspected vehicles.
2. the detection method of fake-licensed car according to claim 1, is characterized in that: described step D) in the shortest hourage between two check points be hourage on the shortest path that obtains at shortest path first.
3. the detection method of the fake-licensed car according to claim 1-2 any one, is characterized in that: described check point is provided with information of vehicles detecting device.
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103116989B (en) * | 2013-01-29 | 2015-10-21 | 江苏省邮电规划设计院有限责任公司 | Based on the catching method of the fake-licensed car vehicle of smart city |
| CN103246876B (en) * | 2013-05-10 | 2017-05-10 | 苏州祥益网络科技有限公司 | Image feature comparison based counterfeit vehicle registration plate identification method |
| CN103279739B (en) * | 2013-05-10 | 2016-05-11 | 浙江捷尚视觉科技股份有限公司 | A kind of deck detection method based on vehicle characteristics coupling |
| CN103700262B (en) * | 2013-12-26 | 2015-07-15 | 福建省视通光电网络有限公司 | Automatic area acquisition method for fake-licensed vehicles |
| CN103871247B (en) * | 2014-03-05 | 2016-04-13 | 浙江宇视科技有限公司 | The method and apparatus of minimum time between a kind of automatic acquisition each camera shooting point |
| CN104537210A (en) * | 2014-12-09 | 2015-04-22 | 深圳市华仁达技术有限公司 | Automatic-search fake plate time threshold value configuration algorithm based on adjacent gates |
| CN104517445A (en) * | 2014-12-09 | 2015-04-15 | 浪潮电子信息产业股份有限公司 | Fake-licensed vehicle identification method based on big data |
| CN105261221B (en) * | 2015-11-13 | 2017-12-15 | 浙江宇视科技有限公司 | The bayonet socket minimum car time difference excessively determines method, deck analysis method and relevant apparatus |
| WO2017124302A1 (en) * | 2016-01-19 | 2017-07-27 | 冯旋宇 | Violation recognition method and system for intelligent transportation |
| CN106128114A (en) * | 2016-08-01 | 2016-11-16 | 深圳市永兴元科技有限公司 | The recognition methods of fake license plate vehicle and device |
| CN106297305A (en) * | 2016-09-18 | 2017-01-04 | 河南工业大学 | A kind of combination license plate identification and the fake-licensed car layer detection method of path optimization |
| CN108073923B (en) * | 2016-11-09 | 2021-09-17 | 杭州海康威视数字技术股份有限公司 | License plate correction method and device |
| CN108121891B (en) * | 2016-11-29 | 2021-01-12 | 杭州海康威视数字技术股份有限公司 | Method and device for determining shortest passing time |
| CN111369805B (en) * | 2020-01-09 | 2021-08-06 | 杭州海康威视系统技术有限公司 | Fake plate detection method and device, electronic equipment and computer readable storage medium |
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