TWI756573B - Security prompt method, vehicle and storage medium - Google Patents

Abstract

The present disclosure provides a security prompt method which is applied to a first vehicle. The method includes acquiring an image of a license plate of a second vehicle during a running of the first vehicle. An area of the license plate of the second vehicle is identified from the image of the license plate of the second vehicle. Basic information of the second vehicle is acquired according to the size of the area of the license plate of the second vehicle. Driving information of the first vehicle is acquired and a safety distance between the first vehicle and the second vehicle is determined according to the driving information of the first vehicle and the basic information of the second vehicle. Once a detected distance between the first vehicle and the second vehicle is less than the safety distance, a warning is issued. The present disclosure also provides a vehicle and a storage medium for realizing the security prompt. The present disclosure can improve driving safety during driving.

Description

Driving safety tips, vehicles and storage media

The invention relates to the technical field of computers, and in particular to a driving safety prompting method, a vehicle and a storage medium.

Accidents on highways happen from time to time. However, most traffic accidents are caused by not maintaining a safe distance between two vehicles. In addition, the driver generally estimates the distance between the two cars manually and adjusts the speed according to the estimated distance to adjust the distance between the two cars. Therefore, the distance between the two cars is estimated manually at a certain value The degree of error also affects the control of the safe distance. Furthermore, many on-site factors such as road conditions during the operation of the vehicle will also affect the adjustment of the vehicle speed, which is not conducive to the adjustment of the vehicle speed so as to maintain a safe distance between the two vehicles.

In view of the above, it is necessary to propose a driving safety reminder method, vehicle and storage medium, which can determine the safety distance according to the basic information of the vehicle and the real-time operation situation during the driving process, and make driving safety reminders according to the determined safety distance, which can effectively improve the safety of driving. Driving safety while driving.

A first aspect of the present invention provides a driving safety prompting method. The method includes: acquiring an image of a license plate of a second vehicle while a first vehicle is driving, and identifying the first vehicle from the image of the license plate of the second vehicle. The area where the license plate of the second vehicle is located; according to the area where the license plate of the second vehicle is located obtain the basic information of the second vehicle according to the size of the domain, wherein the basic information of the second vehicle includes the width and/or height of the second vehicle; obtain the driving information of the first vehicle; The driving information of a vehicle and the basic information of the second vehicle determine the safe distance between the first vehicle and the second vehicle; detect the distance between the first vehicle and the second vehicle; and when the distance between the first vehicle and the second vehicle is less than the safety distance, a warning is issued.

Preferably, the second vehicle is a vehicle driving in front of the first vehicle or a vehicle driving behind the first vehicle.

Preferably, the method further comprises: storing the actual size of the license plate of the second vehicle in advance, wherein the actual size of the license plate of the second vehicle is: width Bw1 and height Bh1; Obtaining the basic information of the second vehicle includes: calculating the width Bw2 and height Bh2 of the area where the license plate of the second vehicle is located; identifying the second vehicle from the image of the license plate of the second vehicle the area where the vehicle is located, and calculate the width Cw2 and height Ch2 of the area where the second vehicle is located; calculate the first ratio between the width Bw2 of the area where the license plate of the second vehicle is located and the width Cw2 of the area where the second vehicle is located , and calculate the second ratio between the height Bh2 of the area where the license plate of the second vehicle is located and the height Ch2 of the area where the second vehicle is located; and according to the first ratio, the second ratio, and the second ratio Calculate the actual size of the license plate of the vehicle to obtain the width and height of the second vehicle, wherein the width of the second vehicle is Cw1 and the height is Ch1; and Cw1=Cw2*(Bw1/Bw2); Ch1=Ch2*( Bh1/Bh2).

Preferably, the method further comprises: storing the actual size of the license plate of the second vehicle in advance, wherein the actual size of the license plate of the second vehicle is: width Bw1 and height Bh1; The size of the area where the license plate of the second vehicle is located. Obtaining the basic information of the second vehicle includes: calculating the length L1 of the diagonal of the area where the license plate of the second vehicle is located; 2. The area where the vehicle is located, and calculate the length L2 of the diagonal of the area where the second vehicle is located; calculate the length of the diagonal of the area where the license plate of the second vehicle is located and the diagonal of the area where the second vehicle is located. The ratio L1:L2 between the lengths; the width and height of the second vehicle are obtained by calculating the calculated ratio L1:L2 and the actual size of the license plate of the second vehicle, wherein The width of the second vehicle is Cw1 and the height is Ch1; and Cw1=Bw1*(L2/L1); Ch1=Bh1*(L2/L1).

Preferably, the method further comprises: storing the actual size of the license plate of the second vehicle in advance, wherein the actual size of the license plate of the second vehicle is: width Bw1 and height Bh1; The size of the area where the license plate of the second vehicle is located. Obtaining the basic information of the second vehicle includes: identifying the area where the second vehicle is located from the image of the license plate of the second vehicle. The total number N1 of primitive points and the total number N2 of the second primitive points in the area where the second vehicle is located; the ratio N1:N2 between the total number N1 of the first primitive points and the total number N2 of the second primitive points is calculated. ; and calculate the width and height of the second vehicle according to the ratio N1:N2 between the total number of the first primitive points and the total number of the second primitive points, and the actual size of the license plate of the second vehicle , wherein the width of the second vehicle is Cw1 and the height is Ch1; and Cw1=Bw1*(N2/N1); Ch1=Bh1*(N2/N1).

Preferably, the driving information of the first vehicle includes the driving speed of the first vehicle, the gradient of the road where the first vehicle is currently located, and the load of the first vehicle.

Preferably, the method retrieves a pre-stored safety distance reference table according to the driving information of the first vehicle and the basic information of the second vehicle to determine the safety distance between the first vehicle and the second vehicle, The safety distance reference table records the corresponding relationship between the driving information of the first vehicle, the basic information of the second vehicle, and the safety distance.

Preferably, the detecting the distance between the first vehicle and the second vehicle comprises: when the second vehicle is a vehicle driving in front of the first vehicle, using a vehicle installed on the first vehicle a first ultrasonic sensor or a first radar at the front of the vehicle to sense the distance between the first vehicle and the second vehicle; and when the second vehicle is driving behind the first vehicle When the vehicle is used, the distance between the first vehicle and the second vehicle is sensed by using a second ultrasonic sensor or a second radar installed at the rear of the first vehicle.

A second aspect of the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores at least one instruction, and when the at least one instruction is executed by a processor, implements the driving safety prompting method.

A third aspect of the present invention provides a vehicle comprising: a memory; a processor; and a plurality of modules, the plurality of modules being stored in the memory and executed by the processor, the The plurality of modules include: an acquisition module, which acquires an image of the license plate of the second vehicle during the driving process of the vehicle, and identifies the area where the license plate of the second vehicle is located from the image of the license plate of the second vehicle; An execution module for acquiring basic information of the second vehicle according to the size of the area where the license plate of the second vehicle is located, wherein the basic information of the second vehicle includes the width and/or height of the second vehicle ; the execution module is also used to obtain the driving information of the vehicle; the execution module is also used to determine the relationship between the vehicle and the vehicle according to the driving information of the vehicle and the basic information of the second vehicle The safety distance between the second vehicle; the execution module is further used to detect the distance between the vehicle and the second vehicle; and the execution module is also used to detect the distance between the vehicle and the second vehicle When the distance between the second vehicles is less than the safety distance, a warning is issued.

The driving safety prompting method, vehicle, and storage medium described in the embodiments of the present invention identify the first vehicle from the image of the license plate of the second vehicle by acquiring the image of the license plate of the second vehicle during the driving of the first vehicle. The area where the license plate of the second vehicle is located; the basic information of the second vehicle is obtained according to the size of the area where the license plate of the second vehicle is located; the driving information of the first vehicle is obtained; according to the driving information of the first vehicle and the second vehicle determine the safety distance between the first vehicle and the second vehicle; detect the distance between the first vehicle and the second vehicle; and when the detected distance is less than the safety distance, send Warning, the safety distance can be calculated according to the height and/or width of the vehicle and the real-time running situation during the driving process, and the driving safety prompt can be made according to the calculated safety distance, which can effectively improve the driving safety during the driving process.

30: Driving safety reminder system

301: Identify the module

302: Execute the module

3: Vehicles

31: Storage

32: Processor

33: Communication bus

34: First camera

35: Second camera

36: Gravity Sensor

37: GPS positioning device

38: The first distance sensor

39: Second distance sensor

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative work.

FIG. 1 is a flowchart of a driving safety prompting method provided by a preferred embodiment of the present invention.

FIG. 2A illustrates an area occupied by a license plate and an area occupied by a vehicle.

Figure 2B illustrates a safety distance reference table.

FIG. 3 is a module diagram of a driving safety prompt system provided by a preferred embodiment of the present invention.

FIG. 4 is a schematic diagram of a vehicle provided by a preferred embodiment of the present invention.

The following specific embodiments will further illustrate the present invention in conjunction with the above drawings.

In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present invention and the features in the embodiments may be combined with each other under the condition of no conflict.

In the following description, many specific details are set forth in order to facilitate a full understanding of the present invention, and the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention.

FIG. 1 is a flowchart of a driving safety prompting method provided by a preferred embodiment of the present invention.

It should be noted that, in this embodiment, the driving safety prompting method can be applied to a vehicle, and for a vehicle that needs a driving safety prompt, the present invention can be directly integrated on the vehicle The function for driving safety prompts provided by the method, or running on the vehicle in the form of a software development kit (Software Development Kit, SDK).

As shown in FIG. 1 , the driving safety prompting method specifically includes the following steps. According to different requirements, the order of the steps in the flowchart can be changed, and some steps can be omitted.

In order to explain the present invention clearly and simply, the present embodiment takes the example of applying the driving safety prompting method to the first vehicle to effectively control the safety distance between the first vehicle and the second vehicle.

Step S1: During the driving of the first vehicle, the first vehicle acquires an image of the license plate of the second vehicle, and identifies the area where the license plate of the second vehicle is located from the image of the license plate of the second vehicle.

In this embodiment, the image of the license plate of the second vehicle may refer to an image including the license plate of the second vehicle. The image of the license plate of the second vehicle may be a video or a photo. In this embodiment, the second vehicle is a vehicle driving in front of the first vehicle or a vehicle driving behind the first vehicle.

In one embodiment, a first camera may be installed at the front of the first vehicle, and a second camera may be installed at the rear of the first vehicle, so that when the second vehicle is driving in the When the vehicle is in front of the first vehicle, the first vehicle can use the first camera to capture an image of the license plate of the second vehicle. When the second vehicle is a vehicle driving behind the first vehicle, the first vehicle can use the second camera to capture an image of the license plate of the second vehicle.

In one embodiment, the recognizing the area where the license plate of the second vehicle is located from the image of the license plate of the second vehicle includes: using a preset image recognition algorithm such as a template matching method from the second vehicle The area where the license plate of the second vehicle is located is identified from the image of the license plate of the second vehicle.

Step S2, the first vehicle obtains the basic information of the second vehicle according to the size of the area where the license plate of the second vehicle is located, wherein the basic information of the second vehicle includes the width and/or the width of the second vehicle. or height.

In this embodiment, the first vehicle prestores the actual size of the license plate of the second vehicle. The actual size of the license plate of the second vehicle is: width Bw1 and height Bh1.

It should be noted that the actual size of the license plate of the second vehicle may refer to the width and height of a license plate specified by the Vehicle Administration.

It should also be noted that, in order to clearly illustrate the present invention, Bw1 is used to represent the actual width of the license plate of the second vehicle, and Bh1 is used to represent the actual height of the license plate of the second vehicle. In addition, the width of the second vehicle is represented by Cw1, and the height of the second vehicle is represented by Ch1. In the first embodiment, the acquiring basic information of the second vehicle according to the size of the area where the license plate of the second vehicle is located includes steps (a1)-(a3):

(a1) Calculate the width Bw2 and height Bh2 of the area where the license plate of the second vehicle is located, and identify the area where the second vehicle is located from the image of the license plate of the second vehicle, and calculate the area where the second vehicle is located The width of Cw2 and the height of Ch2.

In this embodiment, the width Bw2 of the area where the license plate of the second vehicle is located can be calculated by calculating the total number of primitive points in the lateral direction of the area where the license plate of the second vehicle is located; and by calculating the area where the license plate of the second vehicle is located The total number of longitudinal primitive points to calculate the height Bh2 of the area where the license plate of the second vehicle is located.

Similarly, the width Cw2 of the area where the second vehicle is located can be calculated by calculating the total number of primitive points in the horizontal direction of the area where the second vehicle is located; and the total number of longitudinal primitive points in the area where the second vehicle is located can be calculated to calculate the high Ch2 of the area where the second vehicle is located.

(a2) Calculate the first ratio between the width Bw2 of the area where the license plate of the second vehicle is located and the width Cw2 of the area where the second vehicle is located, and calculate the height Bh2 of the area where the license plate of the second vehicle is located and the width Bh2 of the area where the license plate of the second vehicle is located The second ratio between the high Ch2 in the area where the second vehicle is located.

(a3) Calculate and obtain the width Cw1 and height Ch1 of the second vehicle according to the first ratio, the second ratio, and the actual size of the license plate of the second vehicle; wherein, Cw1=Cw2*(Bw1/Bw2) ; Ch1=Ch2*(Bh1/Bh2).

In the second embodiment, the acquiring basic information of the second vehicle according to the size of the area where the license plate of the second vehicle is located includes steps (b1)-(b3):

(b1) calculating the diagonal length L1 of the area where the license plate of the second vehicle is located, identifying the area where the second vehicle is located from the image of the license plate of the second vehicle, and calculating the area where the second vehicle is located The diagonal length L2.

Specifically, the region where the second vehicle is located is identified from the image of the license plate of the second vehicle by using a preset image recognition algorithm such as a template matching method.

Specifically, as described in the above step (a1), the length and width of the area where the license plate of the second vehicle is located can be calculated by counting the total number of primitive points, and then the length and width of the area where the license plate of the second vehicle is located can be calculated based on the Pythagorean theorem. The length L1 of the diagonal of the area where the license plate of the second vehicle is located. Similarly, the length and width of the area where the second vehicle is located can be calculated by counting the total number of primitive points, and then the length of the diagonal of the area where the second vehicle is located can be calculated based on the Pythagorean theorem L2.

(b2) Calculate the ratio L1 : L2 between the length of the diagonal of the area where the license plate of the second vehicle is located and the length of the diagonal of the area where the second vehicle is located.

(b3) Calculate the width and height of the second vehicle according to the calculated ratio L1:L2 and the actual size of the license plate of the second vehicle, wherein the width of the second vehicle is Cw1, High is Ch1; and Cw1=Bw1*(L2/L1); Ch1=Bh1*(L2/L1).

In the third embodiment, the acquiring basic information of the second vehicle according to the size of the area where the license plate of the second vehicle is located includes steps (c1)-(c3):

(c1) Identify the area where the second vehicle is located from the image of the license plate of the second vehicle, and count the total number N1 of first primitive points in the area where the license plate of the second vehicle is located (for the convenience of description, the The total number of primitive points in the area where the license plate of the second vehicle is located is referred to as "the total number of first primitive points"), and the total number N2 of the second primitive points in the area where the second vehicle is located (for the convenience of description, the second The total number of primitive points in the area where the vehicle is located is called "total number of second primitive points").

Specifically, the region where the second vehicle is located is identified from the image of the license plate of the second vehicle by using a preset image recognition algorithm such as a template matching method.

(c2) Calculate the ratio between the total number N1 of the first primitive points and the total number N2 of the second primitive points (ie, N1:N2).

(c3) According to the ratio between the total number of the first primitive points and the total number of the second primitive points (ie N1:N2), and the size of the license plate of the second vehicle (ie the license plate of the second vehicle Width Bw1 and height Bh1), calculate the width Cw1 and height Ch1 of the second vehicle, where Cw1=Bw1*(N2/N1); Ch1=Bh1*(N2/N1).

For example, the picture 100 shown in FIG. 2A is an image of the license plate of the second vehicle. The first vehicle can count the total number N1 of first primitive points in the area 101 where the license plate of the second vehicle is located, and count the first For the total number N2 of second graphic element points in the area 102 where the two vehicles are located, the ratio between the total number N1 of the first graphic element points and the total number N2 of the second graphic element points (ie, N1:N2) is calculated. Then, according to the ratio between the total number of the first primitive points and the total number of the second primitive points (ie N1:N2), and the size of the license plate of the second vehicle (ie the license plate of the second vehicle width Bw1 and height Bh1), calculate the width Cw1 and height Ch1 of the second vehicle. That is, Cw1=Bw1*(N2/N1); Ch1=Bh1*(N2/N1).

It can be seen from the above-mentioned first, second, and third embodiments that the width Cw1 and height Ch1 of the second vehicle are obtained according to the size of the area where the license plate of the second vehicle is located. The width Cw1 and the height Ch1 of the second vehicle calculated in the example are more accurate than the width Cw1 and the height Ch1 of the second vehicle calculated in the second and third embodiments.

Step S3, the first vehicle acquires the driving information of the first vehicle. The driving information of the first vehicle includes, but is not limited to, the driving speed of the first vehicle, the gradient of the road where the first vehicle is currently located, and the load of the first vehicle. Wherein, the load capacity of the first vehicle is also the maximum load capacity of the first vehicle.

In one embodiment, the first vehicle may acquire the traveling speed of the first vehicle using a speed sensor installed on the first vehicle. In other embodiments, the first vehicle may also use a GPS (Global Positioning System, global positioning system) positioning device installed on the first vehicle to acquire the traveling speed of the first vehicle. It should be noted that the global positioning system uses Navigation satellites perform timing, positioning and ranging, and can provide users with real-time high-precision three-dimensional space, speed and time information all-weather, all-round and continuous all over the world. This is a known technology in the field.

In this embodiment, the first vehicle may use any method for calculating a road gradient in the prior art to obtain the gradient of the road where the first vehicle is currently located. For example, the first vehicle may use a G-Sensor (gravity sensor) installed on the first vehicle to obtain the gradient of the road where the first vehicle is currently located. In one embodiment, the gradient of the road on which the first vehicle is currently located may be divided into uphill, flat, and downhill.

In one embodiment, the load of the first vehicle may be pre-stored in the first vehicle, that is, the load of the first vehicle is a known number.

Step S4, the first vehicle determines the safety distance between the first vehicle and the second vehicle according to the driving information of the first vehicle and the basic information of the second vehicle.

In one embodiment, the first vehicle prestores a safety distance reference table, and the safety distance reference table records the driving information of the first vehicle, the basic information of the second vehicle, and the safety distance. Correspondence between. The first vehicle may retrieve the safety distance reference table according to the driving information of the first vehicle and the basic information of the second vehicle to determine the safety distance between the first vehicle and the second vehicle.

In order to explain the present invention clearly and simply, the driving information of the first vehicle only includes the driving speed, and the basic information of the second vehicle only includes the width of the second vehicle as an example. Referring to FIG. 2B , when the current traveling speed of the first vehicle is 65 km/h and the width of the second vehicle is 1.5 m, the first vehicle and the second vehicle can be determined The safe distance between them is 40 meters.

It should be noted that the safety distance reference table exemplified in FIG. 2B is only for illustration and cannot be interpreted as a limitation of the present invention.

Step S5, the first vehicle detects the distance between the first vehicle and the second vehicle.

In one embodiment, a first distance sensor may be installed at the front of the first vehicle, the first distance sensor may be an ultrasonic sensor or a radar, and at the rear of the first vehicle A second distance sensor is installed, which may be an ultrasonic sensor or a radar. Therefore, when the second vehicle is a vehicle driving in front of the first vehicle, the first vehicle can use the first distance sensor to sense the distance between the first vehicle and the first vehicle. distance between two vehicles. When the second vehicle is a vehicle driving behind the first vehicle, the first vehicle can use the second distance sensor to sense the distance between the first vehicle and the second vehicle distance between.

Step S6, the first vehicle judges whether the distance between the first vehicle and the second vehicle is less than the determined safety distance, and when the distance between the first vehicle and the second vehicle is less than When the determined safe distance is reached, a warning is issued.

In one embodiment, the issuing of the warning may include: displaying predetermined text information on the display of the first vehicle to prompt the driver of the first vehicle; and/or controlling the speaker of the first vehicle to issue a warning sound effects.

To sum up, in the driving safety prompting method described in the embodiment of the present invention, the image of the license plate of the second vehicle is acquired during the driving of the first vehicle, and the image of the license plate of the second vehicle is identified from the image of the license plate of the second vehicle. The area where the license plate of the second vehicle is located; the basic information of the second vehicle is obtained according to the size of the area where the license plate of the second vehicle is located; the driving information of the first vehicle is obtained; according to the driving information of the first vehicle and the second vehicle determine the safety distance between the first vehicle and the second vehicle; detect the distance between the first vehicle and the second vehicle; and when the detected distance is less than the safety distance, send Warning, the safety distance can be calculated according to the height and/or width of the vehicle and the real-time running situation during the driving process, and the driving safety prompt can be made according to the calculated safety distance, which can effectively improve the driving safety during the driving process.

The above-mentioned Fig. 1 describes the driving safety prompting method of the present invention in detail. Below in conjunction with Fig. 3 and Fig. 4, the functional modules of the software device for realizing the driving safety prompting method and the hardware device architecture for realizing the driving safety prompting method are described in detail. Introduce.

It should be understood that the embodiments are only used for illustration, and are not limited by this structure in the scope of the patent application.

Referring to FIG. 3 , it is a module diagram of a driving safety prompt system provided by a preferred embodiment of the present invention.

In some embodiments, the driving safety reminder system 30 operates in a vehicle (eg, the first vehicle or the second vehicle). The driving safety reminder system 30 may include a plurality of functional modules composed of program code segments. The computer program codes of each program segment in the driving safety prompting system 30 can be stored in the memory of the vehicle and executed by the at least one processor to implement (see FIG. 1 for details) the driving safety prompting.

In this embodiment, the driving safety prompting system 30 can be divided into a plurality of functional modules according to the functions it performs. The function module may include: an identification module 301 and an execution module 302 . The module referred to in the present invention refers to a series of computer program segments that can be executed by at least one processor and can perform fixed functions, and are stored in a memory. In this embodiment, the functions of each module will be described in detail in subsequent embodiments.

In order to explain the present invention clearly and simply, the following takes the driving safety prompting system 30 to operate the first vehicle as an example for description.

The identification module 301 acquires the image of the license plate of the second vehicle during the driving of the first vehicle, and identifies the area where the license plate of the second vehicle is located from the image of the license plate of the second vehicle.

In this embodiment, the image of the license plate of the second vehicle may refer to an image including the license plate of the second vehicle. The image of the license plate of the second vehicle may be a video or a photo. In this embodiment, the second vehicle is a vehicle driving in front of the first vehicle or a vehicle driving behind the first vehicle.

In one embodiment, a first camera may be installed at the front of the first vehicle, and a second camera may be installed at the rear of the first vehicle, so that when the second vehicle is driving in the When the vehicle in front of the first vehicle is detected, the recognition module 301 can use the first camera to capture an image of the license plate of the second vehicle. When the second vehicle is driving behind the first vehicle When the vehicle is facing, the recognition module 301 can use the second camera to capture an image of the license plate of the second vehicle.

In one embodiment, the recognizing the area where the license plate of the second vehicle is located from the image of the license plate of the second vehicle includes: using a preset image recognition algorithm such as a template matching method from the second vehicle The area where the license plate of the second vehicle is located is identified from the image of the license plate of the second vehicle.

The execution module 302 acquires the basic information of the second vehicle according to the size of the area where the license plate of the second vehicle is located, wherein the basic information of the second vehicle includes the width and/or height of the second vehicle.

In this embodiment, the execution module 302 pre-stores the actual size of the license plate of the second vehicle. The actual size of the license plate of the second vehicle is: width Bw1 and height Bh1.

It should be noted that the actual size of the license plate of the second vehicle may refer to the width and height of a license plate specified by the Vehicle Administration.

It should also be noted that, in order to clearly illustrate the present invention, Bw1 is used to represent the actual width of the license plate of the second vehicle, and Bh1 is used to represent the actual height of the license plate of the second vehicle. In addition, the width of the second vehicle is represented by Cw1, and the height of the second vehicle is represented by Ch1. In the first embodiment, the acquiring basic information of the second vehicle according to the size of the area where the license plate of the second vehicle is located includes steps (a1)-(a3):

(a1) Calculate the width Bw2 and height Bh2 of the area where the license plate of the second vehicle is located, and identify the area where the second vehicle is located from the image of the license plate of the second vehicle, and calculate the area where the second vehicle is located The width of Cw2 and the height of Ch2.

In this embodiment, the width Bw2 of the area where the license plate of the second vehicle is located can be calculated by calculating the total number of primitive points in the lateral direction of the area where the license plate of the second vehicle is located; and by calculating the area where the license plate of the second vehicle is located The total number of longitudinal primitive points to calculate the height Bh2 of the area where the license plate of the second vehicle is located.

Similarly, the width Cw2 of the area where the second vehicle is located can be calculated by calculating the total number of primitive points in the horizontal direction of the area where the second vehicle is located; and the total number of longitudinal primitive points in the area where the second vehicle is located can be calculated to calculate the high Ch2 of the area where the second vehicle is located.

(a2) Calculate the first ratio between the width Bw2 of the area where the license plate of the second vehicle is located and the width Cw2 of the area where the second vehicle is located, and calculate the height Bh2 of the area where the license plate of the second vehicle is located and the width Bh2 of the area where the license plate of the second vehicle is located The second ratio between the high Ch2 in the area where the second vehicle is located.

(a3) Calculate and obtain the width Cw1 and height Ch1 of the second vehicle according to the first ratio, the second ratio, and the actual size of the license plate of the second vehicle; wherein, Cw1=Cw2*(Bw1/Bw2) ; Ch1=Ch2*(Bh1/Bh2).

In the second embodiment, the acquiring basic information of the second vehicle according to the size of the area where the license plate of the second vehicle is located includes steps (b1)-(b3):

(b1) calculating the diagonal length L1 of the area where the license plate of the second vehicle is located, identifying the area where the second vehicle is located from the image of the license plate of the second vehicle, and calculating the area where the second vehicle is located The diagonal length L2.

Specifically, the region where the second vehicle is located is identified from the image of the license plate of the second vehicle by using a preset image recognition algorithm such as a template matching method.

Specifically, as described in the above step (a1), the length and width of the area where the license plate of the second vehicle is located can be calculated by counting the total number of primitive points, and then the length and width of the area where the license plate of the second vehicle is located can be calculated based on the Pythagorean theorem. The length L1 of the diagonal of the area where the license plate of the second vehicle is located. Similarly, the length and width of the area where the second vehicle is located can be calculated by counting the total number of primitive points, and then the length of the diagonal of the area where the second vehicle is located can be calculated based on the Pythagorean theorem L2.

(b2) Calculate the ratio L1 : L2 between the length of the diagonal of the area where the license plate of the second vehicle is located and the length of the diagonal of the area where the second vehicle is located.

(b3) Calculate the width and height of the second vehicle according to the calculated ratio L1:L2 and the actual size of the license plate of the second vehicle, wherein the width of the second vehicle is Cw1, High is Ch1; and Cw1=Bw1*(L2/L1); Ch1=Bh1*(L2/L1).

In the third embodiment, the acquiring basic information of the second vehicle according to the size of the area where the license plate of the second vehicle is located includes steps (c1)-(c3):

(c1) Identify the area where the second vehicle is located from the image of the license plate of the second vehicle, and count the total number N1 of first primitive points in the area where the license plate of the second vehicle is located (for the convenience of description, the The total number of primitive points in the area where the license plate of the second vehicle is located is referred to as "the total number of first primitive points"), and the total number N2 of the second primitive points in the area where the second vehicle is located (for the convenience of description, the second The total number of primitive points in the area where the vehicle is located is called "total number of second primitive points").

Specifically, the region where the second vehicle is located is identified from the image of the license plate of the second vehicle by using a preset image recognition algorithm such as a template matching method.

(c2) Calculate the ratio between the total number N1 of the first primitive points and the total number N2 of the second primitive points (ie, N1:N2).

(c3) According to the ratio between the total number of the first primitive points and the total number of the second primitive points (ie N1:N2), and the size of the license plate of the second vehicle (ie the license plate of the second vehicle Width Bw1 and height Bh1), calculate the width Cw1 and height Ch1 of the second vehicle, where Cw1=Bw1*(N2/N1); Ch1=Bh1*(N2/N1).

For example, the picture 100 shown in FIG. 2A is an image of the license plate of the second vehicle, the execution module 302 can count the total number N1 of the first primitive points in the area 101 where the license plate of the second vehicle is located, and count the For the total number N2 of second primitive points in the area 102 where the second vehicle is located, the ratio between the total number N1 of the first primitive points and the total number N2 of the second primitive points (ie, N1:N2) is calculated. Then, according to the ratio between the total number of the first primitive points and the total number of the second primitive points (ie N1:N2), and the size of the license plate of the second vehicle (ie the license plate of the second vehicle width Bw1 and height Bh1), calculate the width Cw1 and height Ch1 of the second vehicle. That is, Cw1=Bw1*(N2/N1); Ch1=Bh1*(N2/N1).

It can be seen from the above-mentioned first, second, and third embodiments that the width Cw1 and height Ch1 of the second vehicle are obtained according to the size of the area where the license plate of the second vehicle is located. The width Cw1 and the height Ch1 of the second vehicle calculated in the example are more accurate than the width Cw1 and the height Ch1 of the second vehicle calculated in the second and third embodiments.

The execution module 302 acquires the driving information of the first vehicle. The driving information of the first vehicle includes, but is not limited to, the driving speed of the first vehicle, the gradient of the road where the first vehicle is currently located, and the load of the first vehicle. Wherein, the load capacity of the first vehicle is also the maximum load capacity of the first vehicle.

In one embodiment, the execution module 302 can acquire the traveling speed of the first vehicle by using a speed sensor installed on the first vehicle. In other embodiments, the execution module 302 may also use a GPS (Global Positioning System, global positioning system) positioning device installed on the first vehicle to acquire the traveling speed of the first vehicle. It should be noted that the global positioning system uses navigation satellites for timing, positioning and ranging, and can provide users with real-time high-precision three-dimensional space, speed and time information all-weather, all-round and continuous all over the world. know technology.

In this embodiment, the execution module 302 may use any method for calculating road gradients in the prior art to obtain the gradient of the road where the first vehicle is currently located. For example, the execution module 302 may use a G-Sensor (gravity sensor) installed on the first vehicle to acquire the gradient of the road where the first vehicle is currently located. In one embodiment, the gradient of the road on which the first vehicle is currently located may be divided into uphill, flat, and downhill.

In one embodiment, the load of the first vehicle may be pre-stored in the first vehicle, that is, the load of the first vehicle is a known number.

The execution module 302 determines the safety distance between the first vehicle and the second vehicle according to the driving information of the first vehicle and the basic information of the second vehicle.

In one embodiment, the execution module 302 prestores a safety distance reference table, and the safety distance reference table records the driving information of the first vehicle, the basic information of the second vehicle, and the safety distance Correspondence between. The execution module 302 may retrieve the safety distance reference table according to the driving information of the first vehicle and the basic information of the second vehicle to determine the safety distance between the first vehicle and the second vehicle .

In order to explain the present invention clearly and simply, the driving information of the first vehicle only includes the driving speed, and the basic information of the second vehicle only includes the width of the second vehicle as an example. Referring to FIG. 2B , when the current traveling speed of the first vehicle is 65 km/h and the width of the second vehicle is 1.5 m, the first vehicle and the second vehicle can be determined The safe distance between them is 40 meters.

It should be noted that the safety distance reference table exemplified in FIG. 2B is only for illustration and cannot be interpreted as a limitation of the present invention.

The execution module 302 detects the distance between the first vehicle and the second vehicle.

In one embodiment, a first distance sensor may be installed at the front of the first vehicle, the first distance sensor may be an ultrasonic sensor or a radar, and at the rear of the first vehicle A second distance sensor is installed, which may be an ultrasonic sensor or a radar. Therefore, when the second vehicle is a vehicle driving in front of the first vehicle, the execution module 302 can use the first distance sensor to sense the distance between the first vehicle and the first vehicle. The distance between the second vehicles. When the second vehicle is a vehicle driving behind the first vehicle, the execution module 302 can use the second distance sensor to sense the first vehicle and the second vehicle the distance between.

The execution module 302 determines whether the distance between the first vehicle and the second vehicle is less than the determined safety distance, and when the distance between the first vehicle and the second vehicle is less than the determined safety distance When the safe distance is reached, a warning is issued.

In one embodiment, the issuing of the warning may include: displaying predetermined text information on the display of the first vehicle to prompt the driver of the first vehicle; and/or controlling the speaker of the first vehicle to issue a warning sound effects.

To sum up, the driving safety reminder system described in the embodiments of the present invention identifies the first vehicle from the image of the license plate of the second vehicle by acquiring the image of the license plate of the second vehicle during the driving of the first vehicle. The area where the license plate of the second vehicle is located; the basic information of the second vehicle is obtained according to the size of the area where the license plate of the second vehicle is located; the driving information of the first vehicle is acquired; according to the driving information of the first vehicle and the second vehicle basic information to determine the security between the first vehicle and the second vehicle distance; detect the distance between the first vehicle and the second vehicle; and when the detected distance is less than the safe distance, issue a warning, which can be based on the height and/or width of the vehicle and the real-time The safety distance is calculated based on the operating conditions, and the driving safety prompt is made according to the calculated safety distance, which effectively improves the driving safety during driving.

Referring to FIG. 4 , it is a schematic structural diagram of a vehicle according to a preferred embodiment of the present invention. In a preferred embodiment of the present invention, the vehicle 3 includes a memory 31, at least one processor 32, at least one communication bus 33, a first camera 34, a second camera 35, a gravity sensor 36, and a GPS positioning device 37. A first distance sensor 38, a second distance sensor 39.

It should be noted that the vehicle 3 may refer to the first vehicle or the second vehicle.

Those skilled in the art should understand that the structure of the vehicle shown in FIG. 4 does not constitute a limitation of the embodiments of the present invention. The vehicle 3 may also include more or less other hardware or software than shown, or a different arrangement of components. For example, the vehicle may further include communication equipment such as a WIFI module, a Bluetooth module, and the like.

In some embodiments, the vehicle 3 includes a terminal that can automatically perform numerical calculation and/or information processing according to pre-set or stored instructions, the hardware of which includes but is not limited to a microprocessor, a dedicated integrated circuit, a programmable Programming gate arrays, digital word processors and embedded devices, etc.

It should be noted that the vehicle 3 is only an example, and other existing or future ones that can be adapted to the present invention should also be included within the protection scope of the present invention, and are incorporated herein by reference.

In some embodiments, the storage 31 is used to store computer program codes and various data, such as the driving safety reminder system 30 installed in the vehicle 3 , and realize high-speed and automatic completion during the operation of the vehicle 3 . Access to programs or data. The storage 31 includes a Read-Only Memory (ROM), a Programmable Read-Only Memory (PROM), and an Erasable Programmable Read-Only Memory (Erasable Programmable Read). -Only Memory, EPROM), one-time programmable read-only memory (One-time Programmable Read-Only Memory (OTPROM), Electronically-Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory (CD-ROM) or other optical discs Storage, disk storage, tape storage, or any other computer-readable storage medium that can be used to carry or store data.

In some embodiments, the at least one processor 32 may be composed of an integrated circuit, for example, may be composed of a single packaged integrated circuit, or may be composed of a plurality of integrated circuits packaged with the same function or different functions , including one or more central processing units (Central Processing Units, CPUs), microprocessors, digital word processing chips, graphics processors and combinations of various control chips, etc. The at least one processor 32 is the control core (Control Unit) of the vehicle 3 , and uses various interfaces and lines to connect various components of the entire vehicle 3 , by running or executing programs or modules stored in the storage 31 . , and call the data stored in the storage 31 to perform various functions of the vehicle 3 and process data, for example, to perform the function of driving safety tips.

In some embodiments, the at least one communication bus 33 is configured to enable connection communication between the storage 31 and the at least one processor 32 and the like.

In some embodiments, the first camera 34 may be installed at the front of the vehicle 3 to capture images of license plates of vehicles driving in front of the vehicle 3 . The second camera 35 may be installed at the rear of the vehicle 3 to capture images of license plates of vehicles driving behind the vehicle 3 . The gravity sensor 36 can be used to sense the gradient of the road where the vehicle 3 is currently located. The GPS positioning device 37 can be used to sense the travel speed of the vehicle 3 . The first distance sensor 38 may be installed at the front of the vehicle 3 for sensing the distance between the vehicle 3 and a vehicle driving in front of the vehicle 3 . The first distance sensor 38 may be an ultrasonic sensor or a radar. The second distance sensor 39 may be installed at the rear of the vehicle 3 for sensing the distance between the vehicle 3 and a vehicle driving behind the vehicle 3 . The second distance sensor 39 may be an ultrasonic sensor or a radar.

Although not shown, the vehicle 3 may also include a power source (such as a battery) for powering the various components, preferably, the power source may logically communicate with the at least one processor 32 through a power management device connected, so as to manage charging, discharging, and power consumption management functions through the power management device. The power supply may also include one or more of a DC or AC power source, a recharging device, a power failure detection circuit, a power converter or inverter, a power supply status indicator, or any other element. The vehicle 3 may further include a variety of sensors, Bluetooth modules, Wi-Fi modules, etc., which will not be repeated here.

It should be understood that the embodiments are only used for illustration, and are not limited by this structure in the scope of the patent application.

The above-mentioned integrated units implemented in the form of software function modules can be stored in a computer-readable storage medium. The above-mentioned software function module is stored in a storage medium, and includes several instructions for causing a vehicle (which may be an on-board computer, etc.) or a processor (processor) to execute parts of the methods described in the various embodiments of the present invention.

In a further embodiment, referring to FIG. 3 , the at least one processor 32 can execute the operating device of the vehicle 3 and various installed application programs (such as the driving safety prompt system 30 ), computer program codes, etc. , for example, the various modules described above.

The storage 31 stores computer program codes, and the at least one processor 32 can call the computer program codes stored in the storage 31 to execute related functions. For example, each of the modules described in FIG. 3 is a computer program code stored in the storage 31 and executed by the at least one processor 32, thereby realizing the functions of the various modules for driving safety The purpose of the prompt.

In an embodiment of the present invention, the storage 31 stores a plurality of instructions, and the plurality of instructions are executed by the at least one processor 32 for driving safety prompts.

Specifically, as shown in FIG. 1 , a specific method for implementing the above instruction by the at least one processor 32 includes: during the driving of the first vehicle, acquiring an image of the license plate of the second vehicle, and obtaining the image of the license plate of the second vehicle from the license plate of the second vehicle. Identify the area where the license plate of the second vehicle is located in the image of the second vehicle; obtain the basic information of the second vehicle according to the size of the area where the license plate of the second vehicle is located, wherein the basic information of the second vehicle includes the first vehicle. 2. the width and/or height of the vehicle; obtain the driving information of the first vehicle; determine the distance between the first vehicle and the second vehicle according to the driving information of the first vehicle and the basic information of the second vehicle the safety distance between the second vehicle; detecting the distance between the first vehicle and the second vehicle; and when the distance between the first vehicle and the second vehicle is less than the safety When the distance is reached, a warning is issued.

Preferably, the second vehicle is a vehicle driving in front of the first vehicle or a vehicle driving behind the first vehicle.

Preferably, the method further comprises: storing the actual size of the license plate of the second vehicle in advance, wherein the actual size of the license plate of the second vehicle is: width Bw1 and height Bh1; Obtaining the basic information of the second vehicle includes: calculating the width Bw2 and height Bh2 of the area where the license plate of the second vehicle is located; identifying the second vehicle from the image of the license plate of the second vehicle the area where the vehicle is located, and calculate the width Cw2 and height Ch2 of the area where the second vehicle is located; calculate the first ratio between the width Bw2 of the area where the license plate of the second vehicle is located and the width Cw2 of the area where the second vehicle is located , and calculate the second ratio between the height Bh2 of the area where the license plate of the second vehicle is located and the height Ch2 of the area where the second vehicle is located; and according to the first ratio, the second ratio, and the second ratio Calculate the actual size of the license plate of the vehicle to obtain the width and height of the second vehicle, wherein the width of the second vehicle is Cw1 and the height is Ch1; and Cw1=Cw2*(Bw1/Bw2); Ch1=Ch2*( Bh1/Bh2).

Preferably, the method further comprises: storing the actual size of the license plate of the second vehicle in advance, wherein the actual size of the license plate of the second vehicle is: width Bw1 and height Bh1; The size of the area where the license plate of the second vehicle is located. Obtaining the basic information of the second vehicle includes: calculating the length L1 of the diagonal of the area where the license plate of the second vehicle is located; 2. The area where the vehicle is located, and calculate the length L2 of the diagonal of the area where the second vehicle is located; calculate the length of the diagonal of the area where the license plate of the second vehicle is located and the diagonal of the area where the second vehicle is located. The ratio L1:L2 between the lengths of The width of the second vehicle is Cw1 and the height is Ch1; and Cw1=Bw1*(L2/L1); Ch1=Bh1*(L2/L1).

Preferably, the method further comprises: storing the actual size of the license plate of the second vehicle in advance, wherein the actual size of the license plate of the second vehicle is: width Bw1 and height Bh1; The size of the area where the license plate of the second vehicle is located. Obtaining the basic information of the second vehicle includes: identifying the area where the second vehicle is located from the image of the license plate of the second vehicle. The total number N1 of primitive points and the total number N2 of the second primitive points in the area where the second vehicle is located; the ratio N1:N2 between the total number N1 of the first primitive points and the total number N2 of the second primitive points is calculated. ; and calculate the width and height of the second vehicle according to the ratio N1:N2 between the total number of the first primitive points and the total number of the second primitive points, and the actual size of the license plate of the second vehicle , wherein the width of the second vehicle is Cw1 and the height is Ch1; and Cw1=Bw1*(N2/N1); Ch1=Bh1*(N2/N1).

Preferably, the driving information of the first vehicle includes the driving speed of the first vehicle, the gradient of the road where the first vehicle is currently located, and the load of the first vehicle.

Preferably, the method retrieves a pre-stored safety distance reference table according to the driving information of the first vehicle and the basic information of the second vehicle to determine the safety distance between the first vehicle and the second vehicle, The safety distance reference table records the corresponding relationship between the driving information of the first vehicle, the basic information of the second vehicle, and the safety distance.

Preferably, the detecting the distance between the first vehicle and the second vehicle comprises: when the second vehicle is a vehicle driving in front of the first vehicle, using a vehicle installed on the first vehicle a first ultrasonic sensor or a first radar at the front of the vehicle to sense the distance between the first vehicle and the second vehicle; and when the second vehicle is driving behind the first vehicle When the vehicle is used, the distance between the first vehicle and the second vehicle is sensed by using a second ultrasonic sensor or a second radar installed at the rear of the first vehicle.

In the several embodiments provided by the present invention, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are only illustrative. For example, the division of the modules is only a logical function division, and other division methods may be used in actual implementation.

The modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical units, that is, they can be located in one place or distributed to multiple networks. on the unit. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution in this embodiment.

In addition, each functional module in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware, or can be implemented in the form of hardware plus software function modules.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-described exemplary embodiments, but that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and not restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and is therefore intended to fall within the scope of the application. All changes within the meaning and scope of equivalents to the scope of the patent are included in the present invention. Any reference signs in the patentable scope should not be construed as limiting the claimed scope. Furthermore, it is clear that the word "comprising" does not exclude other units or, and the singular does not exclude the plural. A plurality of units or devices stated in the device item may also be implemented by one unit or device through software or hardware. The terms first, second, etc. are used to denote names and do not denote any particular order.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent substitutions can be made without departing from the spirit and scope of the technical solutions of the present invention.

Claims (9)

A driving safety prompting method, wherein the method comprises: acquiring an image of a license plate of a second vehicle while a first vehicle is driving, and using an image recognition algorithm to identify the image of the license plate of the second vehicle The area where the license plate of the second vehicle is located; the basic information of the second vehicle is obtained according to the size of the area where the license plate of the second vehicle is located, wherein the basic information of the second vehicle includes the width and height of the second vehicle ; Obtain the driving information of the first vehicle, the driving information of the first vehicle includes: the driving speed of the first vehicle, the slope of the road where the first vehicle is currently located, and the load of the first vehicle; according to The driving information of the first vehicle and the basic information of the second vehicle determine a safe distance between the first vehicle and the second vehicle; using an ultrasonic sensor or radar installed in the first vehicle detecting the distance between the first vehicle and the second vehicle; and when the distance between the first vehicle and the second vehicle is smaller than the safety distance, issuing a warning. The driving safety prompting method according to claim 1, wherein the second vehicle is a vehicle driving in front of the first vehicle or a vehicle driving behind the first vehicle. The driving safety prompting method according to claim 1, wherein the method further comprises: storing the actual size of the license plate of the second vehicle in advance, wherein the actual size of the license plate of the second vehicle is: width Bw1 and height Bh1 ; wherein, obtaining the basic information of the second vehicle according to the size of the area where the license plate of the second vehicle is located includes: calculating the width Bw2 and the height Bh2 of the area where the license plate of the second vehicle is located; Identify the area where the second vehicle is located in the image of the license plate of the vehicle, and calculate the width Cw2 and height Ch2 of the area where the second vehicle is located; calculate the width Bw2 of the area where the license plate of the second vehicle is located and the second vehicle. The first ratio between the width Cw2 of the area where it is located, and the height Bh2 of the area where the license plate of the second vehicle is located is calculated with a second ratio between the height Ch2 of the area where the second vehicle is located; and the width and height, wherein the width of the second vehicle is Cw1 and the height is Ch1; and Cw1=Cw2*(Bw1/Bw2); Ch1=Ch2*(Bh1/Bh2). The driving safety prompting method according to claim 1, wherein the method further comprises: storing the actual size of the license plate of the second vehicle in advance, wherein the actual size of the license plate of the second vehicle is: width Bw1 and height Bh1 ; wherein, acquiring the basic information of the second vehicle according to the size of the area where the license plate of the second vehicle is located includes: calculating the length L1 of the diagonal of the area where the license plate of the second vehicle is located; Identify the area where the second vehicle is located in the image of the license plate of the second vehicle, and calculate the length L2 of the diagonal of the area where the second vehicle is located; calculate the length of the diagonal of the area where the license plate of the second vehicle is located and The ratio L1:L2 between the lengths of the diagonal lines of the area where the second vehicle is located; the second The width and height of the vehicle, wherein the width of the second vehicle is Cw1 and the height is Ch1; and Cw1=Bw1*(L2/L1); Ch1=Bh1*(L2/L1). The driving safety prompting method according to claim 1, wherein the method further comprises: storing the actual size of the license plate of the second vehicle in advance, wherein the actual size of the license plate of the second vehicle is: width Bw1 and height Bh1 ; Wherein, the obtaining the basic information of the second vehicle according to the size of the area where the license plate of the second vehicle is located includes: identifying the area where the second vehicle is located from the image of the license plate of the second vehicle, and the statistical institute Calculate the total number N1 of the first graphic element points in the area where the license plate of the second vehicle is located and count the total number N2 of the second graphic element points in the area where the second vehicle is located; calculate the total number N1 of the first graphic element points and the second graphic element. The ratio N1 between the total number of element points N2: N2; and according to the ratio N1:N2 between the total number of the first primitive points and the total number of the second primitive points, and the actual size of the license plate of the second vehicle, calculate the width of the second vehicle and height, wherein the width of the second vehicle is Cw1 and the height is Ch1; and Cw1=Bw1*(N2/N1); Ch1=Bh1*(N2/N1). The driving safety prompting method according to claim 1, wherein the method searches a pre-stored safety distance reference table according to the driving information of the first vehicle and the basic information of the second vehicle to determine the distance between the first vehicle and the second vehicle. The safety distance between the second vehicles, wherein the safety distance reference table records the corresponding relationship between the driving information of the first vehicle, the basic information of the second vehicle, and the safety distance. The driving safety prompting method according to claim 3, wherein the driving safety prompting method calculates the width Bw2 of the area where the license plate of the second vehicle is located by calculating the total number of graphic element points in the lateral direction of the area where the license plate of the second vehicle is located; and Calculate the height Bh2 of the area where the license plate of the second vehicle is located by calculating the total number of primitive points in the longitudinal direction of the area where the license plate of the second vehicle is located; Calculate by calculating the total number of primitive points in the horizontal direction of the area where the second vehicle is located The width Cw2 of the area where the second vehicle is located; and the height Ch2 of the area where the second vehicle is located by calculating the total number of primitive points in the longitudinal direction of the area where the second vehicle is located. A computer-readable recording medium, wherein the computer-readable recording medium stores at least one instruction, and when the at least one instruction is executed by a processor, the driving safety as described in any one of claim items 1 to 7 is realized hint method. A vehicle, wherein the vehicle includes: a memory; a processor; and a plurality of modules stored in the memory and executed by the processor, the plurality of modules The group includes: an acquisition module, which acquires an image of the license plate of the second vehicle during the driving process of the vehicle, and uses an image recognition algorithm to identify the location of the license plate of the second vehicle from the image of the license plate of the second vehicle. Area domain; the execution module is used to obtain the basic information of the second vehicle according to the size of the area where the license plate of the second vehicle is located, wherein the basic information of the second vehicle includes the width and height of the second vehicle ; the execution module is also used to obtain the driving information of the vehicle, the driving information of the vehicle includes: the driving speed of the vehicle, the slope of the road where the vehicle is currently located, and the load of the vehicle; the The execution module is further configured to determine the safety distance between the vehicle and the second vehicle according to the driving information of the vehicle and the basic information of the second vehicle; the execution module is further configured to utilize the installation The ultrasonic sensor or radar of the vehicle detects the distance between the vehicle and the second vehicle; and the execution module is also used for when the distance between the vehicle and the second vehicle is When the distance is less than the safety distance, a warning is issued.

Images