CN110874931B

CN110874931B - Method, system and device for recognizing license plate of vehicle

Info

Publication number: CN110874931B
Application number: CN201810995413.6A
Authority: CN
Inventors: 郝杰鹏; 王平; 陈忠元; 邓永强
Original assignee: Beijing Wanji Technology Co Ltd
Current assignee: Beijing Wanji Technology Co Ltd
Priority date: 2018-08-29
Filing date: 2018-08-29
Publication date: 2021-06-15
Anticipated expiration: 2038-08-29
Also published as: CN110874931A

Abstract

The application discloses a method, a system and a device for recognizing a license plate of a vehicle. The method comprises the following steps: acquiring a media access control address (MAC address) set and image information of a target vehicle, wherein the MAC address is carried by target equipment in the target vehicle, and the target vehicle is a vehicle running on a target road section; judging whether the image information of the target vehicle can determine the license plate information of the target vehicle or not, wherein the license plate information comprises the license plate number of the target vehicle; if the license plate information of the target vehicle can be determined, determining the license plate information of the target vehicle based on the image information of the target vehicle; and if the license plate information of the target vehicle cannot be determined, determining the license plate information of the target vehicle based on the MAC address. The problem that the license plate number of the vehicle cannot be accurately identified in the related technology is solved through the method and the device.

Description

Method, system and device for recognizing license plate of vehicle

Technical Field

The application relates to the field of vehicle identification, in particular to a method, a system and a device for identifying a license plate of a vehicle.

Background

The license plate recognition technology is a technology capable of detecting vehicles on a monitored road surface and automatically extracting and processing vehicle license plate information (such as Chinese characters, English letters, Arabic numbers, license plate colors and the like). Although the license plate recognition technology is mature, the technology is greatly influenced by various factors such as environment, light, weather and the like, the conditions of license plate fouling, malicious shielding and license plate counterfeiting exist, and in addition, the picture content of the license plate picture in high-speed motion cannot meet the unified standard. Therefore, the vehicle identification by the license plate recognition technology cannot be accurate.

In addition, from an analog camera to a high-definition camera, a problem that the high resolution of an image is contradictory to the recognition speed is also caused. Due to the wide coverage of the picture, the high-definition picture may have a plurality of license plate identifications in the picture at the same time. The requirement on the speed of license plate recognition is very high, the license plate recognition system has overlarge high-definition video stream code flow, the problem of too low processing speed can be caused by overlarge resource occupation requirement of the recognition system in analysis, the vehicle missing phenomenon can be caused, and the vehicle snapshot rate and the license plate recognition accuracy rate are difficult to improve.

Aiming at the technical problem that the license plate number of the vehicle cannot be accurately identified in the prior art, a solution is not obtained at present.

Disclosure of Invention

The application provides a method, a system and a device for recognizing a vehicle license plate, which are used for solving the problem that the license plate number of a vehicle cannot be recognized accurately in the related technology.

According to one aspect of the present application, a method of identifying a license plate of a vehicle is provided. The method comprises the following steps: acquiring a media access control address (MAC address) set and image information of a target vehicle, wherein the MAC address is carried by target equipment located in the target vehicle, and the target vehicle is a vehicle running on a target road section; judging whether the image information of the target vehicle can determine the license plate information of the target vehicle or not, wherein the license plate information comprises the license plate number of the target vehicle; if the license plate information of the target vehicle can be determined, determining the license plate information of the target vehicle based on the image information of the target vehicle; and if the license plate information of the target vehicle cannot be determined, determining the license plate information of the target vehicle based on the MAC address.

Optionally, after determining the license plate information of the target vehicle, the method further includes: binding and storing license plate information of the target vehicle and each MAC address in the MAC address set; and binding and storing the license plate information of the target vehicle and the image information.

Optionally, the binding and storing the license plate information of the target vehicle and each MAC address in the MAC address set includes: sequentially judging whether the license plate information is bound and stored with each MAC address; if the license plate information and the MAC address are bound and stored, increasing the number of binding times of the license plate information and the MAC address by a preset number of unit values; and if the license plate information and the MAC address are not bound and stored, binding the license plate information of the target vehicle and the MAC address which is not bound and stored.

Optionally, determining license plate information of the target vehicle based on the MAC address comprises: determining reference license plate information meeting a first preset condition in the plurality of license plate information bound by the MAC address; if the reference license plate information exists, determining license plate information of the target vehicle based on the reference license plate information; and if the reference license plate information does not exist, after a first preset time period, re-executing the step of determining the reference license plate information meeting the first preset condition in the plurality of license plate information bound by the MAC address.

Optionally, determining the license plate information of the target vehicle based on the reference license plate information comprises: acquiring reference image information corresponding to the reference license plate information, wherein the reference image information comprises characteristics of a reference vehicle corresponding to the reference license plate information; judging whether the similarity between the characteristics of the target vehicle and the characteristics of the reference vehicle meets a second preset condition or not according to reference image information and the image information of the target vehicle, wherein the image information of the target vehicle comprises the characteristics of the target vehicle; if the similarity meets a second preset condition, determining that the reference license plate information is the license plate information of the target vehicle; and if the similarity does not meet a second preset condition, after a second preset time period, re-executing the step of determining the reference license plate information meeting the first preset condition in the plurality of license plate information bound by the MAC address.

Optionally, the method further comprises: detecting weight information of the target vehicle, wherein the weight information of the target vehicle is bound and stored with license plate information of the target vehicle after the license plate information of the target vehicle is determined; and determining license plate information of the target vehicle based on the reference license plate information further comprises: acquiring reference weight information corresponding to the reference license plate information, wherein the reference weight information comprises historical weight detected by a reference vehicle corresponding to the reference license plate information within historical time; judging whether the reference weight information and the weight information of the target vehicle meet a third preset condition or not; determining that the reference license plate information is the license plate information of the target vehicle under the condition that a third preset condition is met; and under the condition that the third preset condition is not met, after a second preset time period, re-executing the step of determining the reference license plate information meeting the first preset condition in the plurality of license plate information bound by the MAC address.

Optionally, in the presence of the reference license plate information, the method further includes: acquiring the determined license plate information of the target vehicle; judging whether the reference license plate information is the same as the license plate information determined by the target vehicle; if the reference license plate information is the same as the license plate information determined by the target vehicle, the step of determining the license plate information of the target vehicle based on the reference license plate information is not executed; if the reference license plate information is not the same as the license plate information determined by the target vehicle, continuing to execute the step of determining the license plate information of the target vehicle based on the reference license plate information

According to another aspect of the present application, a system for identifying a license plate of a vehicle is provided. The system comprises: the Wi-Fi probe equipment is used for identifying a media access control address (MAC address) existing in a target vehicle, wherein the target vehicle is a vehicle running on a target road section, and the MAC address is identification information carried by target equipment located in the target vehicle; the vehicle image acquisition device is used for acquiring image information of a target vehicle on a target road section; and the processor is connected with the Wi-Fi probe equipment and the vehicle image acquisition device, judges whether the image information of the target vehicle can determine the license plate information of the target vehicle, determines the license plate information of the target vehicle based on the image information of the target vehicle if the image information of the target vehicle can be determined, and determines the license plate information of the target vehicle based on the MAC address if the license plate information of the target vehicle cannot be determined, wherein the license plate information comprises the license plate number of the target vehicle.

Optionally, the system further comprises: and the memory is connected with the processor and used for binding and storing the license plate information of the target vehicle and the MAC address existing in the target vehicle, and binding and storing the license plate information of the target vehicle and the image information of the target vehicle.

Optionally, the processor comprises: the MAC address receiving unit is connected with the Wi-Fi probe equipment and used for receiving an MAC address set existing in the target vehicle and sent by the Wi-Fi probe equipment; the image information receiving unit is connected with the vehicle image acquisition device and used for receiving the image information sent by the vehicle image acquisition device and determining the license plate information of the target vehicle based on the image information; the first license plate information determining unit is linked with the MAC address receiving unit and the image information receiving unit and is used for determining reference license plate information meeting a first preset condition in a plurality of license plate information bound by the MAC address and determining the license plate information of the target vehicle based on the reference license plate information; and the binding storage unit is connected with the MAC address receiving unit, the image information receiving unit and the memory and is used for binding and storing the license plate information of the target vehicle and the MAC address set existing in the target vehicle in the memory and/or binding and storing the license plate information of the target vehicle and the image information in the memory.

Optionally, the system further comprises: vehicle weight acquisition means for detecting a current weight of a target vehicle on a target road segment to acquire weight information of the target vehicle; the processor further comprises: the vehicle weight receiving unit is connected with the vehicle weight acquiring device and the binding storage unit and is used for receiving the weight information of the target vehicle sent by the vehicle weight acquiring device, wherein the binding storage unit binds and stores the license plate information and the weight information of the target vehicle in the memory, and the memory binds and stores the license plate information and the weight information of the target vehicle; and the second license plate information determining unit is connected with the memory and the vehicle weight receiving unit and is used for determining the license plate information of the target vehicle based on the current weight and the historical weight of the target vehicle.

According to another aspect of the present application, there is provided an apparatus for recognizing a license plate of a vehicle. The device includes: the device comprises an acquisition unit, a processing unit and a display unit, wherein the acquisition unit is used for acquiring a media access control address (MAC address) set existing in a target vehicle and image information of the target vehicle, the target vehicle is a vehicle running on a target road section, and the MAC address is identification information carried by target equipment located in the target vehicle; the judging unit is used for judging whether the image information of the target vehicle can determine the license plate information of the target vehicle or not, wherein the license plate information comprises the license plate number of the target vehicle; the first determining unit is used for determining the license plate information of the target vehicle based on the image information of the target vehicle under the condition that the license plate information of the target vehicle can be determined; and a second determining unit, configured to determine the license plate information of the target vehicle based on the MAC address if the license plate information of the target vehicle cannot be determined.

The method comprises the following steps: acquiring a media access control address (MAC address) set and image information of a target vehicle, wherein the MAC address is carried by target equipment located in the target vehicle, and the target vehicle is a vehicle running on a target road section; judging whether the image information of the target vehicle can determine the license plate information of the target vehicle or not, wherein the license plate information comprises the license plate number of the target vehicle; if the license plate information of the target vehicle can be determined, determining the license plate information of the target vehicle based on the image information of the target vehicle; if the license plate information of the target vehicle cannot be determined, the license plate information of the target vehicle is determined based on the MAC address, and the problem that the license plate number of the vehicle cannot be accurately identified in the related technology is solved. According to the method for recognizing the license plate of the vehicle, the license plate information of the target vehicle is determined based on the MAC address under the condition that the license plate information of the target vehicle cannot be determined according to the image information of the target vehicle, so that the technical effects that the license plate number of the vehicle is recognized accurately, and the recognition process is not interfered by external factors are achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:

FIG. 1 is a flow chart of a method for identifying a license plate of a vehicle according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an alternative method for identifying a license plate of a vehicle according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a system for identifying license plates of a vehicle according to an embodiment of the present application; and

fig. 4 is a schematic diagram of an apparatus for recognizing a license plate of a vehicle according to an embodiment of the present application.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

For convenience of description, some terms or expressions referred to in the embodiments of the present application are explained below:

a Wi-Fi probe: the device can obtain the MAC address of the mobile phone within the signal coverage range of the device, does not need a user to access a Wi-Fi network, has extremely short obtaining time and does not interfere the communication of the mobile phone.

MAC address: the MAC address of the Wi-Fi wireless network card is specified here. The MAC address of the wireless network card is a special and unique serial number of the access network device, namely an identity card number of the mobile phone network card. The mobile phone MAC address is composed of a string of English plus numeric characters and has global uniqueness.

According to an embodiment of the application, a method for recognizing a license plate of a vehicle is provided.

Fig. 1 is a flowchart of a method for recognizing a license plate of a vehicle according to an embodiment of the present application. As shown in fig. 1, the method comprises the steps of:

step S102, a media access control address (MAC address) set existing in a target vehicle and image information of the target vehicle are obtained, wherein the target vehicle is a vehicle running on a target road section, and the MAC address is identification information carried by target equipment located in the target vehicle.

And step S104, judging whether the image information of the target vehicle can determine the license plate information of the target vehicle, wherein the license plate information comprises the license plate number of the target vehicle.

And step S106, if the license plate information of the target vehicle can be determined, determining the license plate information of the target vehicle based on the image information of the target vehicle.

And step S108, if the license plate information of the target vehicle cannot be determined, determining the license plate information of the target vehicle based on the MAC address.

The method for recognizing the license plate of the vehicle, provided by the embodiment of the application, comprises the steps of acquiring a media access control address (MAC address) set and image information of a target vehicle, wherein the target vehicle is a vehicle running on a target road section, and the MAC address is identification information carried by target equipment located in the target vehicle; judging whether the image information of the target vehicle can determine the license plate information of the target vehicle or not, wherein the license plate information comprises the license plate number of the target vehicle; if the license plate information of the target vehicle can be determined, determining the license plate information of the target vehicle based on the image information of the target vehicle; if the license plate information of the target vehicle cannot be determined, the license plate information of the target vehicle is determined based on the MAC address, and the problem that the license plate number of the vehicle cannot be accurately identified in the related technology is solved.

According to the method for recognizing the license plate of the vehicle, the license plate information of the target vehicle is determined based on the MAC address under the condition that the license plate information of the target vehicle cannot be determined according to the image information of the target vehicle, so that the technical effects that the license plate number of the vehicle is recognized accurately, and the recognition process is not interfered by external factors are achieved.

The specific explanation for the above is as follows: when people go out, they often carry mobile electronic products such as mobile phones, so the mobile electronic product for judging drivers (fixed people) in target vehicles also becomes an auxiliary basis for judging the target vehicles. Based on this, in steps S102 and S108 in the present embodiment, the target vehicle is identified based on the MAC address by acquiring the MAC address in the target vehicle. Namely, the relationship between the target vehicle and the mobile electronic product is determined, the association strength between the target vehicle and the plurality of mobile electronic products bound with the target vehicle is gradually determined, the target vehicle corresponding to the MAC address is determined based on the association strength, the target vehicle is further identified, the vehicle license plate number is accurately identified, and the technical effect that the identification process is not interfered by external factors is achieved.

In addition, in addition to the MAC address, any identification information that can identify a fixed person to some extent may be substituted for the MAC address, for example: an intelligent chip implanted in a human body, an IMSI code and the like.

First, the following description will be made with respect to the acquisition of the MAC address set existing in the target vehicle in step S102:

the method for checking the MAC address comprises two methods, wherein one method is road section detection, namely detecting the MAC address of a certain road section in a certain time; the second is accurate detection, that is, detecting the MAC address of a specific location (e.g., in a vehicle).

For the first road segment detection, in step S102, if the obtained MAC address existing in the target vehicle is: the MAC addresses carried by all the traveling vehicles on the target road segment, and it is not possible to determine which target vehicle the MAC address is specifically carried by. Therefore, if the license plate information of the target vehicle is determined based on the MAC address in step S108, the target vehicle and all MAC addresses acquired on the target road segment need to be bound one by one, and as the binding data gradually increases, the association strength between the MAC address and the plurality of vehicles bound thereto can be determined by the number of times of binding the MAC address and the plurality of vehicles bound thereto, and the target vehicle can be determined based on the MAC address.

An example is illustrated: when the MAC addresses a carried by the vehicle A and the vehicle A travel on the gamma road section, and the MAC addresses B carried by the vehicle B and the vehicle B also travel on the gamma road section, the vehicle A establishes a binding relationship with the MAC addresses a and the MAC addresses B. However, when the MAC address carried by the vehicle a is detected next time, the possibility that the vehicle a and the MAC address b appear simultaneously is extremely low, and therefore, as the number of times of identifying the license plate of the vehicle a is greater, the strength of association between the MAC address of the real identifier of the vehicle a and the vehicle a is greater, and the corresponding vehicle is more easily identified based on the MAC address.

For the second accurate detection, only the MAC address existing in the target vehicle needs to be accurately detected, and then the target vehicle is identified according to the MAC address.

For the above binding step, in the method for recognizing a license plate of a vehicle in this embodiment, after determining license plate information of a target vehicle, the method further includes: and binding and storing the license plate information of the target vehicle and each MAC address in the MAC address set, namely binding the target vehicle and all the MAC addresses acquired on the target road section one by one. At this time, the target vehicle can be bound with the MAC address which is not carried by the target vehicle, but when the license plate information of the vehicle is identified next time, the probability that the target vehicle is accidentally encountered with the MAC address which is not carried by the target vehicle is extremely low, so that the influence of binding the target vehicle with the MAC address which is not carried by the target vehicle can be ignored.

It should be noted that: based on the characteristics of road section detection, only the MAC address of a certain road section occurring within a certain time can be detected, so that the license plate information of the target vehicle and each MAC address in the MAC address set are bound and stored, namely the target vehicle is taken as a time base point when running at a certain point of the target road section, the MAC addresses occurring within the time range of the target road section in the T time period before and after the time base point are collected, and the MAC addresses are bound with the target vehicle. Wherein the T duration is related to the length of the target road segment and the vehicle speed of the target vehicle.

In order to ensure the simplicity of the binding data and facilitate the determination of the target vehicle (license plate information of the target vehicle) based on the MAC address in the subsequent steps, the specific method for binding and storing the license plate information of the target vehicle and each MAC address in the MAC address set may be as follows: sequentially judging whether the license plate information is bound and stored with each MAC address; if the license plate information and the MAC address are bound and stored, increasing the number of binding times of the license plate information and the MAC address by a preset number of unit values; and if the license plate information and the MAC address are not bound and stored, binding the license plate information of the target vehicle and the MAC address which is not bound and stored.

At the moment, the binding relationship between the license plate information and the MAC address is not repeated, the condition that the binding data are too redundant can not occur, and the simplicity of the binding data is ensured. And in the subsequent steps, the judgment speed for determining the license plate information based on the MAC address is correspondingly improved, and the user experience is improved.

For the step of identifying the license plate information of the target vehicle based on the MAC address, in the method for identifying a license plate of a vehicle in this embodiment, determining the license plate information of the target vehicle based on the MAC address may further specifically be: determining reference license plate information meeting a first preset condition in a plurality of license plate information bound by the MAC address; if the reference license plate information exists, determining license plate information of the target vehicle based on the reference license plate information; and if the reference license plate information does not exist, after a first preset time period, re-executing the step of determining the reference license plate information meeting the first preset condition in the plurality of license plate information bound by the MAC address.

In summary, determining license plate information of a target vehicle based on an MAC address in one example determines whether the MAC address has corresponding license plate information whose associated strength satisfies a certain condition, if so, further determines license plate information of the target vehicle based on the license plate information whose associated strength satisfies the certain condition, otherwise, continues to wait for the presence of corresponding license plate information whose associated strength satisfies the certain condition at the MAC address, and further determines license plate information of the target vehicle based on the license plate information after the presence of corresponding license plate information whose associated strength satisfies the certain condition.

In an optional example, if the plurality of license plate information bound by the MAC address does not have reference license plate information, that is, the MAC address does not have corresponding license plate information whose association strength satisfies a certain condition, the MAC address and the unrecognized target vehicle are bound and stored in a database of the "unrecognized vehicle", and it is periodically determined whether the reference license plate information satisfying a first preset condition appears in the plurality of license plate information bound by the MAC address.

In an optional example, the reference license plate information that satisfies the first preset condition in the plurality of license plate information bound by the MAC address may be: and determining the binding times between the plurality of license plate information bound by the MAC address and the MAC address, and when the binding times are greater than the preset binding times, considering the license plate information with the binding times greater than the preset binding times as the reference license plate information of the MAC address. It should be noted that: the higher the preset binding times, the greater the correlation strength between the MAC address and the license plate information, and the higher the accuracy of the method for recognizing the license plate of the vehicle provided by the embodiment.

In another optional example, the reference license plate information that satisfies the first preset condition in the plurality of license plate information bound by the MAC address may be: and determining the binding times between the plurality of license plate information bound by the MAC address and the MAC address, and determining the license plate information with the highest binding times as reference license plate information, wherein the binding times are at least more than or equal to 2.

Since there may be a plurality of reference license plate information satisfying the first preset condition, determining the license plate information of the target vehicle based on the reference license plate information may be: acquiring reference image information corresponding to the reference license plate information, wherein the reference image information comprises the characteristics of a reference vehicle corresponding to the reference license plate information; judging whether the similarity of the characteristics of the target vehicle and the characteristics of the reference vehicle meets a second preset condition or not according to the reference image information and the image information of the target vehicle, wherein the image information of the target vehicle comprises the characteristics of the target vehicle; if the similarity meets a second preset condition, determining that the reference license plate information is the license plate information of the target vehicle; and if the similarity does not meet the second preset condition, after a second preset time period, re-executing the step of determining the reference license plate information meeting the first preset condition in the plurality of license plate information bound by the MAC address.

That is, when the reference license plate information corresponding to the MAC address existing on the target road segment is acquired, the image information of the target vehicle for which the license plate information is not recognized is acquired, and the reference image information of the reference vehicle corresponding to the reference license plate information is acquired. Based on this, the characteristics of the target vehicle are determined from the image information of the target vehicle, and the characteristics of the reference vehicle are also determined from the reference image information of the reference vehicle. When the characteristics are compared, if the characteristics of the target vehicle and the reference vehicle are found to be similar, the license plate letter of the reference vehicle is considered as the license plate information of the target vehicle, if the characteristics of the target vehicle and the reference vehicle are found to be greatly different, the reference vehicle is considered to be unrelated to the target vehicle, and the characteristic similarity of the next reference vehicle and the target vehicle is further judged until the judgment is finished. In addition, after the reference license plate information is determined, whether the reference vehicle corresponding to the reference license plate information is the same as the target vehicle or not is further judged, and the accuracy of recognizing the license plate of the vehicle is improved.

It should be noted that: in the above example of further determining whether the reference vehicle corresponding to the reference license plate information is the same as the target vehicle, the method for improving the license plate recognition of the vehicle further includes: and binding and storing the license plate information and the image information of the target vehicle. The image information includes characteristics of the target vehicle, specifically, vehicle model information, vehicle color information, vehicle exterior identification, and the like.

In order to further narrow the range of the reference license plate information, in another optional example, the method for recognizing the license plate of the vehicle further includes, in the presence of the reference license plate information: acquiring the license plate information of a target vehicle; judging whether the reference license plate information is the same as the license plate information determined by the target vehicle; if the reference license plate information is the same as the license plate information already determined by the target vehicle, the step of determining the license plate information of the target vehicle based on the reference license plate information is not executed; and if the reference license plate information is not the same as the license plate information determined by the target vehicle, continuing to execute the step of determining the license plate information of the target vehicle based on the reference license plate information.

Based on the above, it can be known that the MAC addresses bound to the target vehicles with no license information recognized are all the MAC addresses detected on the target road segment, and the MAC addresses bound to the target vehicles with no license information recognized may include the MAC addresses carried by the target vehicles with license information already recognized, in order to exclude the MAC addresses carried by the target vehicles with license information already recognized from the MAC addresses bound to the target vehicles with no license information recognized, it is determined whether the reference license information is the same as the license information already determined by the target vehicles, and in the case that the reference license information is the same as the license information already determined by the target vehicles, the license information of the target vehicles is no longer determined based on the reference license information, and in the case that the reference license information is not the same as the license information already determined by the target vehicles, the license plate information of the target vehicle continues to be determined based on the reference license plate information.

It should be noted that: under the condition that the reference license plate information is the same as the license plate information determined by the target vehicle, the license plate information of the target vehicle is not determined based on the reference license plate information, and the method specifically comprises the following steps: and determining the license plate information of the target vehicle based on the reference license plate information, and further judging whether other reference license plate information is the same as the license plate information determined by the target vehicle or not until all reference license plate information is judged.

In order to ensure that the binding relationship between the license plate information and the MAC address in the method for identifying the license plate of the vehicle is accurate, in an optional example, reference license plate information meeting a first preset condition in a plurality of license plate information bound by any MAC address is obtained based on a preset time period; judging whether the reference license plate information is identified when the MAC address is collected; if not, acquiring the image information of the target vehicle running on the target road section when the MAC address is acquired, acquiring the image information corresponding to the reference license plate information, and determining whether the reference vehicle corresponding to the reference license plate information exists in the target vehicle running on the target road section.

It should be noted that: when the flow step of determining the license plate information of the target vehicle based on the reference license plate information is executed, historical bearing data of the reference vehicle corresponding to the reference license plate information can be contained in the reference license plate information, and then the historical bearing data of the reference vehicle corresponding to the reference license plate information is compared with current bearing data of the target vehicle to determine whether the reference license plate information is the license plate information of the target vehicle.

Specifically, in the method for recognizing the license plate of the vehicle provided by the embodiment of the application, the method further includes detecting weight information of the target vehicle, wherein the weight information of the target vehicle is bound and stored with the license plate information of the target vehicle after the license plate information of the target vehicle is determined.

Based on the weight information bound and stored with the license plate information of the target vehicle, further, determining the license plate information of the target vehicle based on the reference license plate information further comprises: acquiring reference weight information corresponding to the reference license plate information, wherein the reference weight information comprises historical weight detected by a reference vehicle corresponding to the reference license plate information within historical time; judging whether the reference weight information and the weight information of the target vehicle meet a third preset condition or not; determining the reference license plate information as the license plate information of the target vehicle under the condition that a third preset condition is met; and under the condition that the third preset condition is not met, after a second preset time period, re-executing the step of determining the reference license plate information meeting the first preset condition in the plurality of license plate information bound by the MAC address.

The following is illustrated by way of example: the current weight of the target vehicle is acquired while the target vehicle is traveling on the target road segment. And binding the current weight of the target vehicle with the license plate information of the target vehicle when the license plate information of the target vehicle is determined.

It should be noted that: the current weight of the target vehicle may be further bound to the image information of the target vehicle and may also be bound to the MAC address set corresponding to the target vehicle, and in short, the current weight of the target vehicle is bound to the related information of the target vehicle, so that the historical weight that the target vehicle has detected can be determined from the related information of the target vehicle.

And under the condition that the image information of the target vehicle cannot determine the license plate information of the target vehicle, and when the reference license plate information which is possibly the license plate information of the target vehicle is acquired, acquiring the historical weight detected by the reference vehicle corresponding to the reference license plate information within the historical time. At this time, the historical weight of the reference vehicle is compared with the current weight of the target vehicle to determine whether the reference vehicle and the target vehicle are the same vehicle, that is, whether the reference license plate information is the license plate information of the target vehicle.

It should be noted that: although the weight of the vehicle changes with the change of the load, the change range is limited within a certain range, that is, when the current weight of the target vehicle is within the weight change range of the reference vehicle, it indicates that the target vehicle is most likely to be the same vehicle as the reference vehicle.

Further, the magnitude of the change in the weight of the vehicle is determined by the historical weight of the vehicle together with the type of the vehicle, or the magnitude of the change in the weight of the vehicle is determined by the historical weight of the vehicle alone.

It should be further noted that: the above two examples of the step of determining the license plate information of the target vehicle based on the reference license plate information are described, that is, the license plate information of the target vehicle is determined by using the reference image information corresponding to the reference license plate information, and the license plate information of the target vehicle is determined by using the reference weight information corresponding to the reference license plate information. The two examples can be combined with each other to increase the judgment accuracy; or may be used alone to simplify the process steps, which are not specifically limited herein.

As shown in fig. 2, the method for recognizing the license plate of the vehicle in this embodiment includes: collecting and storing MAC addresses of mobile phones in vehicles running on a road; capturing the passing vehicles to obtain image information and storing the image information; and identifying the license plate based on the shot image.

And if the license plate can be identified, binding the identified license plate result with the MAC address.

If the license plate cannot be identified, calling image information of a suspected vehicle according to the MAC address, comparing the unidentified vehicle with the suspected vehicle, if the characteristics are the same, taking the license plate number of the suspected vehicle as the license plate number of the unidentified vehicle, and if the characteristics are different or the suspected vehicle is similar, storing the unidentified vehicle and the MAC address in an unidentified license plate database; and calling image information of the suspected vehicle according to the MAC address regularly.

It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than presented herein.

The embodiment of the present application further provides a system for recognizing a vehicle license plate, and it should be noted that the system for recognizing a vehicle license plate of the embodiment of the present application may be used to execute the method for recognizing a vehicle license plate provided by the embodiment of the present application. The following describes a system for recognizing a license plate of a vehicle according to an embodiment of the present disclosure.

FIG. 3 is a schematic diagram of a system for identifying a license plate of a vehicle according to an embodiment of the application. As shown in fig. 3, the system includes: a Wi-Fi probe device 31, a vehicle image acquisition device 32 and a processor 33.

The Wi-Fi probe equipment is used for identifying a media access control address (MAC address) existing in a target vehicle, wherein the target vehicle is a vehicle running on a target road section, and the MAC address is identification information carried by target equipment located in the target vehicle.

And the vehicle image acquisition device 32 is used for acquiring the image information of the target vehicle on the target road section.

The processor 33 is connected to the Wi-Fi probe device 31 and the vehicle image acquisition device 32, and determines whether the image information of the target vehicle can determine the license plate information of the target vehicle, if so, determines the license plate information of the target vehicle based on the image information of the target vehicle, and if not, determines the license plate information of the target vehicle based on the MAC address, where the license plate information includes a license plate number of the target vehicle.

Optionally, in the system for recognizing a license plate of a vehicle provided in the embodiment of the present application, the system further includes: and the memory is connected with the processor 33 and is used for binding and storing the license plate information of the target vehicle and the MAC address existing in the target vehicle, and binding and storing the license plate information of the target vehicle and the image information of the target vehicle.

Optionally, in the system for recognizing a license plate of a vehicle provided in the embodiment of the present application, the processor 33 includes: the MAC address receiving unit is connected with the Wi-Fi probe equipment 31 and used for receiving an MAC address set existing in the target vehicle and sent by the Wi-Fi probe equipment 31; the image information receiving unit is connected with the vehicle image acquisition device 32 and used for receiving the image information sent by the vehicle image acquisition device 32 and determining the license plate information of the target vehicle based on the image information; the first license plate information determining unit is linked with the MAC address receiving unit and the image information receiving unit and used for determining reference license plate information meeting a first preset condition in the plurality of license plate information bound by the MAC address and determining license plate information of a target vehicle based on the reference license plate information; and the binding storage unit is connected with the MAC address receiving unit, the image information receiving unit and the memory and is used for binding and storing the license plate information of the target vehicle and the MAC address set existing in the target vehicle in the memory and/or binding and storing the license plate information of the target vehicle and the image information in the memory.

Optionally, in the system for recognizing a license plate of a vehicle provided in the embodiment of the present application, the system further includes: vehicle weight acquisition means for detecting a current weight of the target vehicle on the target road section to acquire weight information of the target vehicle; the processor 33 further includes: the vehicle weight receiving unit is connected with the vehicle weight acquiring device and the binding storage unit and is used for receiving the weight information of the target vehicle sent by the vehicle weight acquiring device, wherein the binding storage unit binds and stores the license plate information and the weight information of the target vehicle in the memory, and the memory binds and stores the license plate information of the target vehicle and the weight information of the target vehicle; and the second license plate information determining unit is connected with the memory and the vehicle weight receiving unit and is used for determining the license plate information of the target vehicle based on the current weight and the historical weight of the target vehicle.

In the system for recognizing the license plate of the vehicle provided by the embodiment of the application, a media access control address (MAC address) existing in a target vehicle is recognized through a Wi-Fi probe device 31, wherein the target vehicle is a vehicle running on a target road section, and the MAC address is identification information carried by target equipment located in the target vehicle; the vehicle image acquisition device 32 acquires image information of a target vehicle on a target road section; the processor 33 is connected to the Wi-Fi probe device 31 and the vehicle image acquiring device 32, and determines whether the image information of the target vehicle can determine the license plate information of the target vehicle, and if the license plate information of the target vehicle can be determined, determining license plate information of the target vehicle based on the image information of the target vehicle, if the license plate information of the target vehicle cannot be determined, determining the license plate information of the target vehicle based on the MAC address, wherein, the license plate information comprises the license plate number of the target vehicle, which solves the problem that the license plate number of the vehicle can not be accurately identified in the related technology, the system for identifying the license plate of the vehicle provided by the embodiment of the application, under the condition that the image information of the target vehicle cannot determine the license plate information of the target vehicle, the license plate information of the target vehicle is determined based on the MAC address, so that the technical effects that the license plate number of the vehicle is accurately identified, and the identification process is not interfered by external factors are achieved.

The embodiment of the application also provides a device for recognizing the license plate of the vehicle, and it should be noted that the device for recognizing the license plate of the vehicle in the embodiment of the application can be used for executing the method for recognizing the license plate of the vehicle in the embodiment of the application. The following describes a device for recognizing a license plate of a vehicle according to an embodiment of the present application.

Fig. 4 is a schematic diagram of an apparatus for recognizing a license plate of a vehicle according to an embodiment of the present application. As shown in fig. 4, the apparatus includes: an acquisition unit 41, a judgment unit 42, a first determination unit 43, and a second determination unit 44.

An obtaining unit 41, configured to obtain a media access control address (MAC address) set existing in a target vehicle and image information of the target vehicle, where the target vehicle is a vehicle traveling on a target road segment, and the MAC address is identification information carried by a target device located in the target vehicle;

the judging unit 42 is configured to judge whether the image information of the target vehicle can determine license plate information of the target vehicle, where the license plate information includes a license plate number of the target vehicle;

a first determining unit 43, configured to determine license plate information of the target vehicle based on the image information of the target vehicle if the license plate information of the target vehicle can be determined;

and a second determining unit 44 configured to determine the license plate information of the target vehicle based on the MAC address if the license plate information of the target vehicle cannot be determined.

In the apparatus for recognizing a license plate of a vehicle provided in the embodiment of the present application, an obtaining unit 41 obtains a media access control address (MAC address) set and image information of a target vehicle existing in the target vehicle, where the target vehicle is a vehicle traveling on a target road segment, and the MAC address is identification information carried by a target device located in the target vehicle; the judging unit 42 judges whether the image information of the target vehicle can determine the license plate information of the target vehicle, wherein the license plate information includes the license plate number of the target vehicle; the first determining unit 43 determines the license plate information of the target vehicle based on the image information of the target vehicle if the license plate information of the target vehicle can be determined; the second determining unit 44 determines the license plate information of the target vehicle based on the MAC address under the condition that the license plate information of the target vehicle cannot be determined, so as to solve the problem that the license plate number of the vehicle cannot be accurately identified in the related art.

Optionally, in the apparatus for recognizing a license plate of a vehicle provided in an embodiment of the present application, the apparatus further includes: the first storage unit is used for binding and storing the license plate information of the target vehicle and each MAC address in the MAC address set after the license plate information of the target vehicle is determined; and the second storage unit is used for binding and storing the license plate information and the image information of the target vehicle.

Optionally, in the apparatus for recognizing a license plate of a vehicle provided in an embodiment of the present application, the first storage unit includes: the first judgment module is used for sequentially judging whether the license plate information is bound and stored with each MAC address; the increasing module is used for increasing the number of times of binding the license plate information and the MAC address by a preset number of unit values under the condition that the license plate information and the MAC address are bound and stored; and the storage module is used for binding and storing the license plate information of the target vehicle and the MAC address which is not bound and stored under the condition that the license plate information and the MAC address are not bound and stored.

Optionally, in the apparatus for recognizing a license plate of a vehicle provided in the embodiment of the present application, the second determining unit 44 includes: the first determining module is used for determining reference license plate information meeting a first preset condition in the plurality of license plate information bound by the MAC address; the second determining module is used for determining the license plate information of the target vehicle based on the reference license plate information under the condition that the reference license plate information exists; the first execution module is configured to re-execute the step of determining the reference license plate information meeting the first preset condition from among the plurality of license plate information bound to the MAC address after a first preset time period if the reference license plate information does not exist.

Optionally, in the apparatus for recognizing a license plate of a vehicle provided in an embodiment of the present application, the second determining module includes: the first obtaining sub-module is used for obtaining reference image information corresponding to the reference license plate information, wherein the reference image information comprises the characteristics of a reference vehicle corresponding to the reference license plate information; the first judgment submodule is used for judging whether the similarity between the characteristics of the target vehicle and the characteristics of the reference vehicle meets a second preset condition or not according to the reference image information and the image information of the target vehicle, wherein the image information of the target vehicle comprises the characteristics of the target vehicle; the first determining submodule is used for determining the reference license plate information as the license plate information of the target vehicle under the condition that the similarity meets a second preset condition; and the first execution submodule is used for re-executing the step of determining the reference license plate information meeting the first preset condition in the plurality of license plate information bound by the MAC address after a second preset time period under the condition that the similarity does not meet the second preset condition.

Optionally, in the apparatus for recognizing a license plate of a vehicle provided in an embodiment of the present application, the apparatus further includes: and the detection unit is used for detecting the weight information of the target vehicle, wherein the weight information of the target vehicle is bound and stored with the license plate information of the target vehicle after the license plate information of the target vehicle is determined. Further, the second determining module includes: the second obtaining submodule is used for obtaining reference weight information corresponding to the reference license plate information, wherein the reference weight information comprises historical weight detected by a reference vehicle corresponding to the reference license plate information within historical time; a second judgment submodule, configured to judge whether the reference weight information and the weight information of the target vehicle satisfy a third preset condition; the second determining submodule is used for determining the reference license plate information as the license plate information of the target vehicle under the condition that a third preset condition is met; and the second execution submodule is used for re-executing the step of determining the reference license plate information meeting the first preset condition in the plurality of license plate information bound by the MAC address after a second preset time period under the condition that the third preset condition is not met.

Optionally, in the apparatus for recognizing a license plate of a vehicle provided in an embodiment of the present application, the apparatus further includes: the acquisition module is used for acquiring the license plate information determined by the target vehicle under the condition that the reference license plate information exists; the second judgment module is used for judging whether the reference license plate information is the same as the license plate information determined by the target vehicle; the second execution module is used for not executing the step of determining the license plate information of the target vehicle based on the reference license plate information under the condition that the reference license plate information is the same as the license plate information determined by the target vehicle; and the third execution module is used for continuously executing the step of determining the license plate information of the target vehicle based on the reference license plate information under the condition that the reference license plate information is different from the license plate information determined by the target vehicle.

As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory.

The memory may include forms of volatile memory in a computer readable medium, Random Access Memory (RAM) and/or non-volatile memory, such as Read Only Memory (ROM) or flash memory (flash RAM). The memory is an example of a computer-readable medium.

Computer-readable media, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, a computer readable medium does not include a transitory computer readable medium such as a modulated data signal and a carrier wave.

It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A method of identifying a license plate of a vehicle, comprising:

acquiring a media access control address (MAC address) set and image information of a target vehicle, wherein the MAC address is carried by target equipment located in the target vehicle, and the target vehicle is a vehicle running on a target road section;

judging whether the image information of the target vehicle can determine the license plate information of the target vehicle or not, wherein the license plate information comprises the license plate number of the target vehicle;

if the license plate information of the target vehicle can be determined, determining the license plate information of the target vehicle based on the image information of the target vehicle;

if the license plate information of the target vehicle cannot be determined, determining the license plate information of the target vehicle based on the MAC address;

after the license plate information of the target vehicle can be determined, the method further comprises the following steps:

binding and storing license plate information of the target vehicle and each MAC address in the MAC address set;

wherein determining license plate information of the target vehicle based on the MAC address comprises:

determining reference license plate information meeting a first preset condition in the plurality of license plate information bound by the MAC address;

if the reference license plate information exists, determining license plate information of the target vehicle based on the reference license plate information;

the method further comprises the following steps:

detecting weight information of the target vehicle, wherein the weight information of the target vehicle is bound and stored with license plate information of the target vehicle after the license plate information of the target vehicle is determined; and

determining license plate information of the target vehicle based on the reference license plate information further comprises:

acquiring reference weight information corresponding to the reference license plate information, wherein the reference weight information comprises historical weight detected by a reference vehicle corresponding to the reference license plate information within historical time;

judging whether the reference weight information and the weight information of the target vehicle meet a third preset condition or not;

determining that the reference license plate information is the license plate information of the target vehicle under the condition that a third preset condition is met;

and under the condition that the third preset condition is not met, after a second preset time period, re-executing the step of determining the reference license plate information meeting the first preset condition in the plurality of license plate information bound by the MAC address.

2. The method of claim 1, wherein after determining the license plate information of the target vehicle, the method further comprises:

and binding and storing the license plate information of the target vehicle and the image information.

3. The method of claim 2, wherein storing the license plate information of the target vehicle in a binding relationship with each of the MAC addresses in the set of MAC addresses comprises:

sequentially judging whether the license plate information is bound and stored with each MAC address;

if the license plate information and the MAC address are bound and stored, increasing the number of binding times of the license plate information and the MAC address by a preset number of unit values;

and if the license plate information and the MAC address are not bound and stored, binding the license plate information of the target vehicle and the MAC address which is not bound and stored.

4. The method of claim 2, wherein determining license plate information for the target vehicle based on the MAC address comprises:

and if the reference license plate information does not exist, after a first preset time period, re-executing the step of determining the reference license plate information meeting the first preset condition in the plurality of license plate information bound by the MAC address.

5. The method of claim 4, wherein determining license plate information for the target vehicle based on the reference license plate information comprises:

acquiring reference image information corresponding to the reference license plate information, wherein the reference image information comprises characteristics of a reference vehicle corresponding to the reference license plate information;

judging whether the similarity between the characteristics of the target vehicle and the characteristics of the reference vehicle meets a second preset condition or not according to reference image information and the image information of the target vehicle, wherein the image information of the target vehicle comprises the characteristics of the target vehicle;

if the similarity meets a second preset condition, determining that the reference license plate information is the license plate information of the target vehicle;

and if the similarity does not meet a second preset condition, after a second preset time period, re-executing the step of determining the reference license plate information meeting the first preset condition in the plurality of license plate information bound by the MAC address.

6. The method of claim 4, wherein in the presence of the reference license plate information, the method further comprises:

acquiring the determined license plate information of the target vehicle;

judging whether the reference license plate information is the same as the license plate information determined by the target vehicle;

if the reference license plate information is the same as the license plate information determined by the target vehicle, the step of determining the license plate information of the target vehicle based on the reference license plate information is not executed;

and if the reference license plate information is different from the license plate information determined by the target vehicle, continuing to execute the step of determining the license plate information of the target vehicle based on the reference license plate information.

7. A system for identifying a license plate of a vehicle, comprising:

the Wi-Fi probe equipment is used for identifying a media access control address (MAC address) existing in a target vehicle, wherein the target vehicle is a vehicle running on a target road section, and the MAC address is identification information carried by target equipment located in the target vehicle;

the vehicle image acquisition device is used for acquiring image information of a target vehicle on a target road section;

the processor is connected with the Wi-Fi probe equipment and the vehicle image acquisition device, judges whether the image information of the target vehicle can determine the license plate information of the target vehicle, determines the license plate information of the target vehicle based on the image information of the target vehicle if the image information of the target vehicle can be determined, and determines the license plate information of the target vehicle based on the MAC address if the license plate information of the target vehicle cannot be determined, wherein the license plate information comprises the license plate number of the target vehicle;

the first license plate information determining unit is connected with the MAC address receiving unit and the image information receiving unit and used for determining reference license plate information meeting a first preset condition in the plurality of license plate information bound by the MAC address and determining the license plate information of the target vehicle based on the reference license plate information; the MAC address receiving unit is connected with the Wi-Fi probe equipment and used for receiving an MAC address set existing in the target vehicle and sent by the Wi-Fi probe equipment;

the memory is connected with the processor and used for binding and storing the license plate information of the target vehicle and the MAC address existing in the target vehicle;

a binding storage unit, connected to the MAC address receiving unit and the memory, for binding and storing the license plate information of the target vehicle and the MAC address set existing in the target vehicle in the memory,

the system further comprises:

vehicle weight acquisition means for detecting a current weight of a target vehicle on a target road segment to acquire weight information of the target vehicle;

the processor further comprises:

the vehicle weight receiving unit is connected with the vehicle weight acquiring device and the binding storage unit and is used for receiving the weight information of the target vehicle sent by the vehicle weight acquiring device, wherein the binding storage unit binds and stores the license plate information and the weight information of the target vehicle in the memory, and the memory binds and stores the license plate information and the weight information of the target vehicle;

and the second license plate information determining unit is connected with the memory and the vehicle weight receiving unit and is used for determining the license plate information of the target vehicle based on the current weight and the historical weight of the target vehicle.

8. The system of claim 7, further comprising:

and the memory is used for binding and storing the license plate information of the target vehicle and the image information of the target vehicle.

9. The system of claim 8, wherein the processor comprises:

the image information receiving unit is connected with the vehicle image acquisition device and used for receiving the image information sent by the vehicle image acquisition device and determining the license plate information of the target vehicle based on the image information;

and the binding storage unit is connected with the image information receiving unit and the memory and binds and stores the license plate information of the target vehicle and the image information in the memory.

10. An apparatus for recognizing a license plate of a vehicle, comprising:

the device comprises an acquisition unit, a processing unit and a display unit, wherein the acquisition unit is used for acquiring a media access control address (MAC address) set existing in a target vehicle and image information of the target vehicle, the target vehicle is a vehicle running on a target road section, and the MAC address is identification information carried by target equipment located in the target vehicle;

the judging unit is used for judging whether the image information of the target vehicle can determine the license plate information of the target vehicle or not, wherein the license plate information comprises the license plate number of the target vehicle;

the first determining unit is used for determining the license plate information of the target vehicle based on the image information of the target vehicle under the condition that the license plate information of the target vehicle can be determined;

a second determining unit, configured to determine license plate information of the target vehicle based on the MAC address if the license plate information of the target vehicle cannot be determined;

wherein the apparatus further comprises: the first storage unit is used for binding and storing the license plate information of the target vehicle and each MAC address in the MAC address set if the license plate information of the target vehicle can be determined;

wherein the second determination unit includes: the first determining module is used for determining reference license plate information meeting a first preset condition in the plurality of license plate information bound by the MAC address; the second determining module is used for determining the license plate information of the target vehicle based on the reference license plate information under the condition that the reference license plate information exists;

the device further comprises: the detection unit is used for detecting the weight information of the target vehicle, wherein the weight information of the target vehicle is bound with the license plate information of the target vehicle for storage after the license plate information of the target vehicle is determined; further, the second determining module includes: the second obtaining submodule is used for obtaining reference weight information corresponding to the reference license plate information, wherein the reference weight information comprises historical weight detected by a reference vehicle corresponding to the reference license plate information within historical time; a second judgment submodule, configured to judge whether the reference weight information and the weight information of the target vehicle satisfy a third preset condition; the second determining submodule is used for determining the reference license plate information as the license plate information of the target vehicle under the condition that a third preset condition is met; and the second execution submodule is used for re-executing the step of determining the reference license plate information meeting the first preset condition in the plurality of license plate information bound by the MAC address after a second preset time period under the condition that the third preset condition is not met.