KR102414012B1 - An Apparatus for determining section over-speed, and system and method therefor - Google Patents

Abstract

According to an embodiment of the present invention, there is proposed an image analysis apparatus for determining the speed in a section of a vehicle, wherein the apparatus obtains vehicle information including a driving image of the vehicle and photographing time information of the driving image at a plurality of points on a road. Vehicle information collection unit to obtain; a path estimator for estimating a candidate path of a section defined by the at least two points with respect to a target vehicle for which vehicle information is obtained from at least two of the plurality of points; a reference calculation unit for calculating a reference time of the estimated candidate path; and an analysis processing unit configured to determine whether the target vehicle is speeding within a section by using the reference time.

Description

Apparatus for determining section over-speed, and system and method therefor

The present invention relates to an image analysis apparatus, system, and method for determining overspeed in a section, and more particularly, to an image analysis apparatus, system and method therefor for determining overspeed in a section using vehicle information.

On public roads and highways, speed cameras are installed to crack down on vehicles violating the speed limit.

A common method of speeding enforcement is to calculate the driving speed through one set of speed measuring equipment at one point. However, the spot enforcement can avoid kangaroo driving that decelerates only around the installed camera, so there is a problem in that the effect of keeping the driver within the speed limit is weak.

In order to overcome this, a section enforcement method has been introduced, which is mainly performed on highways or high-speed roads, and is a control method for detecting speeding by measuring section speed. Section enforcement is a vehicle in the section by measuring the time it takes for two sets of speed measuring devices installed at the starting point and the end point of the section to face the driving direction of the vehicle, respectively, passing through the two points and the distance between the two points. It entails calculating the average running speed of

However, although it may be possible to newly install and operate the speed measurement equipment for speed control in the existing section on a highway or expressway, application in the city center where multiple routes between any two points are possible are included in each route. It is judged difficult because the prescribed speed may be different due to the existence of a child protection zone or an elderly protection zone, and the length of the route also changes depending on the case because there are a plurality of combinations of routes. In addition, the installation of additional speed measuring equipment is costly, and in particular, it is inefficient in that many camera devices are already installed in the city center.

Accordingly, there is a need for a method of using a plurality of cameras installed on the road to control section speed using traffic information of vehicles at two arbitrary points.

An object of the present invention is to propose an image analysis apparatus, system, and method for enabling speeding determination in a section between any two points on a road. Through this, we aim to minimize subsequent disputes.

More specifically, by estimating one or more candidate routes between any two points on the road and calculating the minimum driving time required to travel the candidate routes, information of the target vehicle (ie, the target vehicle) of the two points and An image analysis apparatus and system capable of comparing and determining whether or not speeding is present and a method for the same are proposed.

The problems to be solved to be achieved in the present invention are not limited to the problems to be solved, and other problems not mentioned may be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

According to an embodiment of the present invention, there is proposed an image analysis apparatus for determining the speed in a section of a vehicle, wherein the apparatus obtains vehicle information including a driving image of the vehicle and photographing time information of the driving image at a plurality of points on a road. Vehicle information collection unit to obtain; a path estimator for estimating a candidate path of a section defined by the at least two points with respect to a target vehicle for which vehicle information is obtained from at least two of the plurality of points; a reference calculation unit for calculating a reference time of the estimated candidate path; and an analysis processing unit configured to determine whether the target vehicle is speeding within a section by using the reference time.

Additionally or alternatively, the candidate path may consist of partial paths with a specified maximum velocity.

Additionally or alternatively, the reference time may be a time required for driving and passing the candidate route or each of the partial routes of the candidate route at a prescribed maximum speed of the candidate route or a prescribed maximum speed of each of the partial routes.

Additionally or alternatively, the vehicle information collection unit includes an algorithm for obtaining the vehicle information by analyzing the driving image of the vehicle, wherein the vehicle information includes a vehicle number, vehicle type, vehicle driving direction information, and vehicle driving It may include at least one of speed, traffic state information, whether the driver wears a seat belt, and whether the driver uses a mobile phone.

Additionally or alternatively, the vehicle information collection unit may include speed detection means for measuring the speed of the vehicle.

Additionally or alternatively, the path estimator determines the candidate path by using image information of the target vehicle existing in the candidate path, or, when there are a plurality of candidate paths, a candidate path that can be removed from among the plurality of candidate paths. can be selected.

Additionally or alternatively, the reference calculation unit may be linked with a storage unit that stores information on a length of a partial path between the plurality of points and information on a prescribed maximum speed.

Additionally or alternatively, the analysis processing unit may compare the reference time with a section transit time obtained from the photographing time information of the target vehicle obtained at the at least two points.

Additionally or alternatively, when there are a plurality of estimated candidate routes, the analysis processing unit may compare a minimum reference time among reference times of each of the candidate routes with a section transit time obtained from photographing time information of the target vehicle.

Additionally or alternatively, when two driving images of a vehicle having time information within a preset time range and driving directions of the vehicle opposite to each other are detected at the same point among the plurality of points, the analysis processing unit detects two driving images of the vehicle It is possible to determine whether a U-turn is illegal.

According to another embodiment of the present invention, there is proposed an image analysis apparatus for determining overspeeding in a section of a vehicle, wherein the apparatus includes a driving image of the vehicle and photographing time information of the driving image at a plurality of points on a road. a vehicle information collection unit for acquiring information; a path estimator for estimating a candidate path of a section defined by the at least two points with respect to a target vehicle for which vehicle information is obtained from at least two of the plurality of points; a reference calculation unit for calculating a reference speed of the estimated candidate path; and an analysis processing unit configured to determine whether the target vehicle is speeding within a section by using the reference speed.

Additionally or alternatively, the reference speed is a speed for driving and traversing the candidate route for a reference time, wherein the reference time determines the candidate route or each of the partial routes of the candidate route as the specified maximum speed of the candidate route or the It may be the time it takes to travel and pass at the prescribed maximum speed for each of the partial routes.

Additionally or alternatively, the analysis processing unit may compare the reference speed with the estimated traveling speed of the target vehicle obtained using the transit time required.

Additionally or alternatively, when there are a plurality of the estimated candidate routes, the analysis processing unit each of the candidate routes obtained by using the reference speed of each candidate route and the required passage time obtained from the photographing time information of the target vehicle. can be compared with the estimated driving speed of

According to another embodiment of the present invention, an image analysis system for determining the speed of a vehicle section is proposed, wherein the system includes vehicle information including a driving image of the vehicle and photographing time information of the driving image at a plurality of points on the road. , and with respect to a target vehicle for which vehicle information is obtained from at least two points among the plurality of points, a candidate route of a section defined by the at least two points is estimated, and a reference time of the estimated candidate route is calculated. and an image analysis device for determining whether the target vehicle is speeding within a section by using the reference time; and an operating device for receiving and displaying the vehicle information, the estimated candidate route, the reference time, or information on whether the vehicle is speeding from the image analysis device.

Additionally or alternatively, the operating device may include an interface for displaying at least one of the vehicle information, the estimated candidate route, the reference time, and information on whether the vehicle is speeding.

Additionally or alternatively, the interface may display at least one of the vehicle information, the estimated candidate route, the reference time, and information on whether the vehicle is speeding on the electronic map.

Additionally or alternatively, the operating device receives vehicle information of the target vehicle from the image analysis device to generate at least one of traffic information, illegal parking information, speed violation information, and crime prevention information, or a traffic information system, illegal parking It can be linked with the enforcement system, the speed control system or the crime prevention system.

Additionally or alternatively, the system may further include a photographing device for photographing the driving image.

Additionally or alternatively, the system may further comprise an object detection device for detecting a vehicle traveling on the roadway.

According to another embodiment of the present invention, an image analysis system for determining the speed of a vehicle section is proposed, wherein the system includes vehicle information including a driving image of the vehicle and photographing time information of the driving image at a plurality of points on the road. , and with respect to a target vehicle for which vehicle information is obtained from at least two points among the plurality of points, a candidate route of a section defined by the at least two points is estimated, and a reference speed of the estimated candidate route is calculated. and an image analysis device for determining whether the target vehicle is speeding within a section by using the reference speed; and an operating device for receiving and displaying the vehicle information, the estimated candidate route, the reference speed, or information on whether the vehicle is speeding from the image analysis device.

According to another embodiment of the present invention, there is proposed an image analysis method for determining the speed in a section of a vehicle, wherein the method includes vehicle information including a driving image of the vehicle and photographing time information of the driving image at a plurality of points on the road. obtaining a; estimating a candidate path of a section defined by the at least two points with respect to a target vehicle for which vehicle information is obtained from at least two of the plurality of points; calculating a reference time of the estimated candidate path; and determining whether the target vehicle is speeding within a section by using the reference time.

According to another embodiment of the present invention, there is proposed an image analysis method for determining the speed in a section of a vehicle, wherein the method includes vehicle information including a driving image of the vehicle and photographing time information of the driving image at a plurality of points on the road. obtaining a; estimating a candidate path of a section defined by the at least two points with respect to a target vehicle for which vehicle information is obtained from at least two of the plurality of points; calculating a reference velocity of the estimated candidate path; and determining whether the target vehicle is speeding within a section by using the reference speed.

The above problem solving methods are only some of the embodiments of the present invention, and various embodiments in which the technical features of the present invention are reflected are based on the detailed description of the present invention to be described below by those of ordinary skill in the art can be derived and understood as

According to the present invention, it is possible to estimate a candidate route using vehicle information at any two points on the road, and it is possible to calculate a speed within a section corresponding to the candidate route, and accordingly, it is possible to determine overspeed in the section.

In addition, even when there are partial routes in which the prescribed speeds are not identical to each other in the candidate route, it is possible to determine the section overspeed by comparing the reference time or the reference speed with the time required for passing the section or the driving speed.

In addition, since photographing devices such as a pre-installed camera can be used, there is no need to install a separate photographing device for determining overspeed in a section, thereby reducing costs.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the art to which the present invention belongs from the following description. will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as a part of the detailed description for better understanding of the present invention, provide embodiments of the present invention, and together with the detailed description, explain the technical spirit of the present invention.
1 shows the overall configuration of an image analysis system related to the present invention.
Figure 2 shows a road related to the present invention and a candidate route therein.
3 is a block diagram of an image analysis apparatus for determining overspeed in a section related to the present invention.
4 is a flowchart of an image analysis method for determining section speed according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included as a part of the detailed description to help the understanding of the present invention, provide embodiments of the present invention, and together with the detailed description, explain the technical spirit of the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments described herein and may be implemented in various other forms. The terminology used herein is for the purpose of helping the understanding of the embodiments, and is not intended to limit the scope of the present invention. Also, singular forms used hereinafter include plural forms unless the phrases clearly indicate the opposite.

1 shows the overall configuration of an image analysis system according to an embodiment of the present invention. In the image analysis system, a photographing device 1 such as a camera for generating an image or detecting an object by photographing a traffic situation, an image analysis device 2 connected to the photographing device 1 by wire or wirelessly, and an image or image Includes operating devices (3) such as traffic control rooms operated by various local governments, the Road Corporation, the Korea National Police Agency, etc. can do. In addition, the image analysis system may further include various object detection devices (eg, at least one of an electromagnetic sensor, a radar sensor, and an image sensor). In this case, the image analysis device 2 operates in conjunction with the object detection device. can The image analysis apparatus 2 according to the present invention may be included in the photographing device 1 or the operating device 3 , or may exist as a separate device or system that communicates with the photographing device 1 and the operating device 3 . have.

2 illustrates a candidate path between two points on a road and speed determination within a section defined by two points according to the present invention. Referring to FIG. 2 , a map is shown, and points A and B are marked on the road on the map, which correspond to any two points. However, at points A and B, means for collecting the image and the shooting time (or the image acquisition time) of the vehicle passing the corresponding point are installed, so that the image and the shooting time of the vehicle can be collected at each point. In addition, arrows are indicated at points A and B in FIG. 2 , which indicate a photographing direction of the photographing apparatus 1 for photographing an image.

In the present invention, the candidate path is defined as a path connecting any two points on the road, and may be composed of at least one partial path. Any point on the road may be, for example, the center of a road or lane or a location or point on the road where a device for acquiring a vehicle image, such as the photographing device 1, is photographing. In this specification, the partial route may mean a road section in which the vehicle can travel at a constant speed without deceleration or stopping factors such as traffic lights or intersections.

In addition, the image analysis apparatus 2 estimates a candidate route between points A and B, and compares the difference between the time taken when each candidate route is driven at a prescribed maximum speed and the image acquisition time of the vehicle, can determine whether Alternatively, the image analysis device 2 calculates the prescribed maximum speed of the candidate route by using the time and distance required when each candidate route is driven at the prescribed maximum speed, and compares this with the running speed of the vehicle to determine whether the vehicle is overspeeding can be judged

However, in determining or determining the section speed according to the present invention, there are a plurality of candidate routes between any two points, such as in a city center, and the prescribed speeds of partial routes within each candidate route may vary. necessary, which will be described later with reference to FIG. 3 .

In Fig. 2, each candidate path is shown as consisting of candidate path 1 (10) composed of partial paths a, b, c, d and candidate path 2 (20) composed of partial paths a, e, f, g, d. became

Meanwhile, in FIG. 2 , two points on the road have been exemplified and described, but it is natural that the method for determining section speed according to the present invention can be applied to at least two points.

3 is a block diagram of an image analysis apparatus 2 for determining section speed according to the present invention. The image analysis apparatus 2 according to the present invention includes a vehicle information collection unit 21 , a path estimation unit 22 , a reference calculation unit 23 , an analysis processing unit 24 , a control unit 25 , a communication unit 26 , and storage. A portion 27 may be included.

Some of the components 21 to 27 may be integrated into one to implement the present invention, or some of the above components may be divided to implement the present invention. In addition, some components of the image analysis apparatus 2 may be included in the photographing apparatus 1 or the operating apparatus 3 to perform an operation according to the present invention, which will be described later.

As an embodiment of the present invention, the image analysis apparatus 2 according to the present invention may use “time information” to determine whether or not there is a speeding within a section. In detail, reference is made to the description that follows below.

The vehicle information collection unit 21 may acquire vehicle information including a driving image of the vehicle and information about a shooting time of the driving image at a plurality of points on the road. To this end, the vehicle information collection unit 21 may obtain a driving image of the vehicle in cooperation with the photographing device 1 such as a camera at each of a plurality of points.

The vehicle information collection unit 21 may analyze the acquired driving image of the vehicle, and recognize the vehicle number therefrom to identify the vehicle. The vehicle information collected by the vehicle information collection unit 21 may be exemplified as shown in Table 1 below.

turn vehicle video vehicle identification number Point shooting time Driving direction (forward/reverse) One

12th Street 3456 A 11:11:03 affection 2

12th Street 3456 B 11:12:03 affection

In Table 1, only the hours, minutes, and seconds are indicated for the shooting time items, and it is assumed that the dates are the same. Although Table 1 shows the acquisition information at two points for one vehicle, the acquisition information at one or more points for one vehicle may be stored, and the acquisition information for one or more vehicles may be stored. The difference in the shooting time between the two points may be estimated as the time taken for the vehicle to pass through the two points. In addition, information other than the acquisition information shown in Table 1 (eg, speeding, signal violation, etc.) may be additionally acquired.

The vehicle information collection unit 21 may collect the driving direction (forward or reverse) of the vehicle through analysis of the driving image, where the forward direction refers to the driving direction approaching the photographing device 1, and the reverse direction refers to the driving direction of the photographing device ( 1) refers to the driving direction away from On the other hand, since time comparison is essential and very important for speed calculation of photographing time information of a driving image of a vehicle acquired at a plurality of points on the road, time synchronization between them is essential. To this end, in recording the photographing time, such as the photographing device 1 or a means for recording a driving image, it may be linked with a network server or a Global Positioning System (GPS).

The vehicle information collection unit 21 includes an algorithm for obtaining vehicle information by analyzing a driving image of the vehicle, and the vehicle information includes vehicle number, vehicle type, vehicle driving direction information, vehicle driving speed, traffic volume, queue and It may include at least one of traffic state information such as an average travel speed, whether the driver wears a seat belt, and whether the driver uses a mobile phone. In addition, the vehicle information collection unit 21 may include a speed detection means for measuring the speed of the vehicle or may be linked with the aforementioned various object detection devices for speed measurement.

The path estimating unit 22 is a candidate path of a section defined by at least two points with respect to a target vehicle for which vehicle information is obtained at at least two points among a plurality of points at which the vehicle information collection unit 21 obtains vehicle information. can be estimated. Here, at least two of the plurality of points may be at least two preset points or at least two points at which a vehicle image of the target vehicle is captured adjacent to each other.

Referring to Table 1, it is assumed that vehicle information including a vehicle image and related information is obtained at points A and B for a target vehicle (12 is 3456 vehicles). In more detail, a vehicle image in a forward direction is captured at points A and B, respectively, and it is necessary to estimate a candidate path from point A to point B. Although Table 1 shows that vehicle images in all directions are obtained for the target vehicle, this is only an example, and it is natural that the present invention is applied even when vehicle images in different directions are obtained.

A vehicle may be identified through a vehicle identification number (often, “license plate” information). According to the information in Table 1, according to the sequential flow of the shooting time, it is estimated that the target vehicle passed through the point A and then the point B. Accordingly, the driving path in the section A-B defined by the points A and B of the target vehicle is the candidate path 1 (10) including the partial paths a, b, c, and d in FIG. 2 and the partial paths a, e, f, g , and d may be any one of the candidate paths 2 (20). There may be more routes on the map, but only candidate routes 1 and 2 are illustrated for simplicity of description.

In order to estimate the candidate path, the path estimator 22 may obtain information on each partial path of the candidate path. Information on the partial path, more specifically, information on the partial path between each point, its length, and a prescribed maximum speed may be stored in the storage unit 25 such as a database. To obtain the partial path, the path estimator 22 may cooperate with the storage unit 25 . The path estimator 22 may determine a possible candidate path between the two points A and B, that is, a combination of the partial paths, by using the information on the partial paths between each point.

Also, the path estimator 22 may estimate at least one candidate path with respect to the target vehicle. When there are a plurality of candidate paths, the path estimator 22 may estimate n (n is a preset number) paths in the order of the shortest lengths based on the lengths of the candidate paths. Alternatively, when there are a plurality of candidate paths, the path estimator 22 may estimate n (where n is a preset number) paths that take a small amount of time based on the time required to pass through the candidate path, , in this case, in order to estimate the n candidate paths, it is possible to link with the reference calculator 23 to be described later or use the reference time calculated by the reference calculator 23 . Also, the path estimator 22 may assign a unique identification number to a candidate path or a partial path constituting the candidate path.

In addition, the path estimator 22 determines an estimated candidate path by using image information of a target vehicle existing in the estimated candidate path, or, when there are a plurality of estimated candidate paths, a candidate path that can be removed from among the plurality of candidate paths. can be selected. Here, the image information of the target vehicle means image information that can identify the target vehicle obtained by means, devices, or systems other than the vehicle information collection unit 21 (eg, method CCTV system, etc.) do. In addition, the image information should be related to the vehicle information obtained from the vehicle information collection unit 21 enough to select a candidate route that can determine or remove a candidate route of the target vehicle. For example, it means that the photographing time information of the image information is adjacent to the photographing time information of the driving image of the vehicle obtained by the vehicle information collection unit 21 or between the photographing time information obtained at two points defining a candidate route, etc. . This image information is referred to as “valid” for path estimation.

The reference calculator 23 may determine a reference time of the candidate route estimated by the route estimator 22 . The candidate path may be configured as a partial path through which the target vehicle can travel within a section defined by at least two points from which vehicle information is obtained. One of the at least two points of the section is the start point of the section, and the other is the end point of the section.

First, the reference calculation unit 23 may calculate a reference time of the candidate path estimated by the path estimation unit 22 . Then, the reference calculator 23 determines the reference time of the estimated candidate route as the reference time of the section when there is one estimated candidate route, and when there are a plurality of estimated candidate routes, the reference time for each estimated candidate route You can decide the time.

The reference time refers to a time required to drive the candidate route at the prescribed maximum speed of the candidate route (eg, 50 km/h in the case of a road having a speed limit of 50 km/h). In addition, when the candidate route is composed of a plurality of partial routes, the reference time means the sum of the reference times of the partial routes required to travel each partial route of the candidate route at the prescribed maximum speed of the partial route. As illustrated in Table 2 below, each partial path belonging to one candidate path may have its own prescribed maximum speed. The specified maximum speed of a partial route may not be equal to the specified maximum speed of another partial route. For example, all partial paths may have different specified top speeds, or only some of all partial paths may have the same specified top speed.

In general, in order to determine overspeeding in a section, a simple comparison is made between the prescribed speed in the section (or the reference time required when driving at the prescribed maximum speed) and the driving speed of the vehicle (or the time it takes to pass the section). The section speed determination method in the city center to which the present invention is applied enables driving through a candidate route including a partial route defined with a unique prescribed maximum speed that is not identical to each other, for example, a section A-B, using a reference time to do it

The reference calculator 23 may calculate the reference time based on the length of each partial route of the candidate route and the prescribed maximum speed.

In order for the reference calculation unit 23 to calculate the reference time, it needs to know the specified maximum speed and length of the candidate path or partial path(s) of the candidate path. Accordingly, the length and the prescribed maximum speed of the candidate path or partial path(s) of the candidate path may be previously stored in the storage unit 25 such as the database described above. The reference calculation unit 23 may calculate the reference time in consideration of a prescribed speed according to the type of vehicle (passenger, cargo, etc.).

As shown in Table 2 below, information on partial paths for two candidate paths between two points A and B shown in FIG. 2 exists, and a reference time may be calculated based on this.

Route partial path Regulated top speed (km/h) Length (m) Reference time (sec) candidate path 1 a 50 30 2.16 b 50 470 33.84 c 30 200 24 d 30 50 6 Sum 750 66 candidate path 2 a 50 30 2.16 e 50 150 10.86 f 50 320 23.04 g 30 220 26.4 d 30 50 6 Sum 770 68.4

In Table 2, the distance of each partial route does not take into account the rotation (left turn or right turn) when the vehicle is driving, but the number of traffic lights in the partial route or candidate route, the number of speed bumps, the presence or number of left/right turns, etc. are the criteria It can be taken into account when calculating time.

Referring to Table 2, the reference time of the candidate path 1 is 66 seconds, and the reference time of the candidate path 2 is 68.4 seconds.

When there are a plurality of candidates, a minimum reference time among them may be set to be used to determine whether the target vehicle is speeding. This is because it is impossible to determine the actual driving path of the target vehicle using only the vehicle images acquired at two points. If it is determined that the vehicle has driven within a shorter time than the reference time, the reference time is determined conservatively in order to be judged as violating the prescribed speed, that is, over-speeding.

The analysis processing unit 24 may use the reference time to determine whether the target vehicle is speeding within a section.

The analysis processing unit 24 calculates the difference between the shooting time of the target vehicle obtained at at least two points collected by the vehicle information collection unit 21 (hereinafter referred to as “section transit time”) and the reference calculation unit 23 . By comparing the reference time of each candidate route or the minimum reference time of the reference time of each candidate route, whether the target vehicle is overspeeding may be determined.

With reference to FIG. 2 and Tables 1 and 2, a process of determining whether the analysis processing unit 24 is overspeeding will be described.

It is assumed that the driving images of the target vehicle acquired by the vehicle information collection unit 21 are acquired at points A and B, and as shown in Table 1, the difference between the shooting time information of the driving images acquired at points A and B is 60 seconds, and , It is assumed that candidate paths 1 and 2 exist as possible candidate paths within the section A-B. According to this, it can be considered that the target vehicle has driven the candidate route 1 or 2 for 60 seconds.

The analysis processing unit 24 may compare the time required for passing the section of the target vehicle (ie, 60 seconds) with the reference time of the candidate paths 1 and 2 . The reference times of candidate routes 1 and 2 are 66 seconds and 68.4 seconds, respectively, which is longer than the 60 seconds required for the target vehicle to pass through the section. Accordingly, since the target vehicle has driven the candidate route 1 or 2 faster than or shorter than the reference time, the analysis processing unit 24 may determine that the target vehicle has overspeeded. In this case, the analysis processing unit 24 may determine the minimum value among the reference times of the candidate paths 1 and 2 as a comparison target. As described above, since it is not possible to specify which candidate path the target vehicle actually traveled, If the time required to pass through the section is less than the minimum value among the reference times of the two candidate routes, it can be determined that the target vehicle has overspeeded regardless of which candidate route was driven. The analysis processing unit 24 may determine that the target vehicle is not speeding when the time required to pass the section of the target vehicle is longer than the reference time of the candidate routes 1 and 2 or is longer than the minimum value among the reference times of the candidate routes 1 and 2 .

This time, it is assumed that the driving images of the target vehicle acquired by the vehicle information collection unit 21 are acquired at points A and B, and the difference between the shooting time information of the driving images acquired at points A and B is 67 seconds, Table 2 Assume that candidate paths 1 and 2 exist as possible candidate paths within the section A-B. According to this, it can be considered that the target vehicle has driven the candidate route 1 or 2 for 67 seconds.

In comparison with the reference time, the analysis processing unit 24 may compare the reference time of the candidate routes 1 and 2 with the time required for passing the section of the target vehicle (ie, 67 seconds). Since the time required for passing the section of the target vehicle is longer than the reference time of the candidate path 1 and shorter than the reference time of the candidate path 2, the analysis processing unit 24 cannot determine that the target vehicle is overspeeding.

This is because there is no other information to support the fact that the target vehicle has driven the candidate path 1 or 2, and therefore, it can be determined that the vehicle has overspeeded only when it has driven both candidate paths for a shorter time than the reference time. As described above, if there is image information of the target vehicle capable of determining a candidate path or selecting a candidate path that can be removed from among a plurality of candidate paths, the path estimator 22 may use the image information when estimating the candidate path. For example, when there is image information of a target vehicle photographed at a specific location (of a partial path) on candidate path 2, and the image information is “valid” information that can be used for path estimation, candidate path 1 is used for path estimation. can be removed in If so, only candidate path 2 exists in relation to the target vehicle, and the analysis processing unit 24 may determine that the target vehicle has overspeeded.

Meanwhile, the analysis processing unit 24 may determine not only whether the vehicle is speeding, but also whether the traffic law is violated, such as an illegal U-turn or a signal violation. As one of them, at the same point among the plurality of points, the analysis processing unit 24 detects two driving images of a vehicle having time information within a preset time range and the driving directions of the vehicle are opposite to each other, or collects vehicle information When it is collected by the unit 21, it can be determined whether the vehicle is an illegal U-turn.

In addition, in the above description, in order to determine whether the target vehicle is overspeeding, the reference time was considered as a criterion for determination, but the present invention can also be utilized to determine low-speed operation, that is, a vehicle traveling at less than a prescribed minimum speed. . In this case, the prescribed speed described above is replaced with the prescribed minimum speed, and the calculated reference time is used. It may be determined that the vehicle is traveling at a low speed.

The control unit 25 includes components of the image analysis apparatus 2 , for example, the vehicle information collection unit 21 , the route estimator 22 , the reference calculation unit 23 , the analysis processing unit 24 , the communication unit 26 , and It controls the storage unit 27, and more specifically, transmits an instruction/command so that the corresponding component implements the features described in this specification, and receives a result thereof, and can receive a result from one component to another component. can convey information, messages, data, etc.

The communication unit 26 includes information on vehicle information acquired by the vehicle information collection unit 21 , information on a candidate path estimated by the path estimator 22 , and reference time calculated by the reference calculation unit 23 . , information generated or acquired by the components of the image analysis apparatus 2, such as a speeding result determined by the analysis processing unit 24, may be transmitted to an external device or system, and more specifically, an external system (eg, , the corresponding information may be transmitted to the operating device 3 ).

The storage unit 27 may store information related to each point on the road, for example, location information of each point, a distance between each point, partial route information between points, prescribed speed information and length information for a partial route, etc. . In addition, the storage unit 27 stores vehicle information obtained by the vehicle information collection unit 21 , information on a candidate path estimated by the path estimation unit 22 , and a reference time calculated by the reference calculation unit 23 . Information generated or acquired by the components of the image analysis apparatus 2 may be stored, such as information on the speed and the speeding result determined by the analysis processing unit 24 .

Although the storage unit 27 is shown as an individual component from other components in FIG. 2 , each component, for example, the vehicle information collection unit 21 , the route estimation unit 22 , the reference calculation unit 23 , A storage unit may be individually provided (eg, provided as a temporary storage unit) also inside at least one of the analysis processing unit 24 , the control unit 25 , and the communication unit 26 . Therefore, in the present specification, it will be reasonable to view that the storage unit 27 corresponds to a concept including a temporary storage unit provided inside at least one of the components.

As another embodiment of the present invention, the image analysis apparatus 2 according to the present invention may use “speed” information to determine whether or not the speed is within a section. In detail, reference is made to the description that follows below.

In more detail, the image analysis device 2 calculates the prescribed maximum speed of the candidate route by using the time and distance required when each candidate route is driven at the prescribed maximum speed, and compares it with the running speed of the vehicle. You can determine whether you are speeding.

In this embodiment, the prescribed maximum speed of the aforementioned candidate route corresponds to the “reference speed”, and the reference speed means the speed at which the candidate route can be driven or passed during the “reference time” described above. In addition, when the candidate route is composed of a plurality of partial routes, the reference speed means a speed at which the candidate route can be driven or passed for a time corresponding to the sum of the reference times of each partial route.

In this embodiment, the description of the vehicle information collection unit 21 , the path estimator 22 , the control unit 25 , the communication unit 26 , and the storage unit 27 refer to the contents of the above-described embodiment.

According to the present embodiment, the reference calculation unit 23 may calculate the reference speed of the candidate path estimated by the path estimation unit. The reference calculation unit 23 may calculate a reference time based on the length of each partial route of the candidate route and the prescribed maximum speed, and calculate the reference speed of the candidate route using the calculated reference time and the length of the candidate route. In order for the reference calculation unit 23 to calculate the reference speed, it needs to know the specified maximum speed and length of the candidate path or partial path(s) of the candidate path. Accordingly, the length of the candidate path or partial path(s) of the candidate path and the prescribed maximum speed may be previously stored in the storage unit 25 described above. The reference calculation unit 23 may calculate the reference speed in consideration of the prescribed speed according to the type of vehicle (passenger, cargo, etc.).

The reference calculator 23 determines the reference speed of the estimated candidate path as the reference speed of the section when there is only one estimated candidate path, and determines the reference speed for each estimated candidate path when there are multiple estimated candidate paths. can

Table 3 shows the additional calculation of the reference speed in the example related to Table 2.

Route partial path Regulated top speed (km/h) Length (m) Reference time (sec) candidate path 1 a 50 30 2.16 b 50 470 33.84 c 30 200 24 d 30 50 6 Sum 40.91 (standard speed) 750 66 candidate path 2 a 50 30 2.16 e 50 150 10.86 f 50 320 23.04 g 30 220 26.4 d 30 50 6 Sum 40.53 (standard speed) 770 68.4

In Table 3, the distance of each partial route does not take into account the rotation (left turn or right turn) when the vehicle is driving, but the number of traffic lights, the number of speed bumps, and the number of turns in the partial route or candidate route are calculated when the reference speed is calculated. can be considered.

Referring to Table 3, the reference speed of the candidate path 1 is 40.91 km/h, and the reference speed of the candidate path 2 is 68.4 seconds and 40.53 km/h.

On the other hand, when determining whether or not speeding within a section is determined using the reference speed, it is necessary to compare the reference speed for each candidate route with the driving speed assuming driving along each candidate route (hereinafter, “estimated driving speed”). there is This is because the length of each candidate path is independent of each other, and thus the estimated driving speed is also obtained for each candidate path.

The analysis processing unit 24 may obtain the estimated driving speed of the target vehicle by using the time required for section passage of the target vehicle and the length of the candidate path. The analysis processing unit 24 may compare the obtained estimated driving speed of the target vehicle with the reference speed calculated by the reference calculation unit 23 to determine whether the target vehicle is overspeeding within the section. The analysis processing unit 24 may determine that the target vehicle has overspeeded when the obtained estimated driving speed of the target vehicle exceeds the reference speed calculated by the reference calculation unit 23 . The analysis processing unit 24 may determine that the target vehicle is not overspeeding when the obtained estimated driving speed of the target vehicle does not exceed the reference speed calculated by the reference calculation unit 23 .

In this case, when there are a plurality of candidate paths, the estimated driving speed of the target vehicle may be calculated for each of the plurality of candidate paths, and the estimated driving speed of the target vehicle for each of the plurality of candidate paths is equal to the reference speed of each of the candidate paths. can be compared. The analysis processing unit 24 determines that when the estimated driving speed exceeds the reference speed for each of the plurality of candidate paths (that is, Vi>Ri, i is the identification number of the candidate path, Vi is the estimated driving speed of the target vehicle of the candidate path i, Ri is the reference speed of the candidate path i), and it may be determined that the target vehicle has overspeeded. The analysis processing unit 24 may determine that the target vehicle is not overspeeding if the estimated driving speed does not exceed the reference speed even on one of the plurality of candidate routes.

The comparison of the reference speed is a one-to-one comparison of the estimated driving speed of the target vehicle in all candidate routes and the reference speed of each candidate route is a comparison of the time required for passing a section and the reference time of the candidate route, that is, if the candidate route has multiple candidate routes. In the case of individuals, it is different from comparing with the minimum standard time. Only when both methods can guarantee that the target vehicle has overspeeded in all candidate routes, the basis for determining that the target vehicle has overspeeded is the same. However, in the case of estimation using the reference time, only the minimum reference time and the time required for passing the section are compared because the section transit time is a single value for all candidate routes (that is, the section transit time for a plurality of candidate routes is the same value). However, in the case of estimation using the reference speed, the estimated driving speed is a variable value depending on the length of each candidate route (that is, an individual or independent value existing for each candidate route). Therefore, in order to achieve the above judgment base, the estimated driving speed for each candidate route should be compared with the reference speed one by one.

However, as a more relaxed standard, the analysis processing unit 24 compares the minimum estimated travel speed among the estimated travel speeds of the candidate route and the maximum reference speed among the reference speeds of the candidate route for simplicity of determining whether or not the target vehicle is overspeeding. You can determine whether or not you are speeding. In this case, the analysis processing unit 24 may determine that the target vehicle is over-speeding when the minimum estimated travel speed among the estimated travel speeds of the candidate route of the target vehicle is higher than the maximum reference speed among the reference speeds of the candidate route.

With reference to FIG. 2 and Tables 1 and 3, a process of determining whether the analysis processing unit 24 is overspeeding will be described. 2 and Table 3, when there are two candidate routes, the analysis processing unit 24 uses the reference speed of the candidate route 1 and the candidate route 1 (length = 750 m) using the time required to pass the A-B section of the target vehicle. The calculated driving speed of candidate path 1 is compared, and the reference speed of candidate path 2 is compared with the driving speed of candidate path 2 calculated using the time required for passing candidate path 2 (length = 770 m) in section A-B of the target vehicle. Accordingly, when the “driving speed” is greater than the “reference speed” for each of the two candidate routes, that is, when it is determined that both of them have overspeeded, it may be determined that the target vehicle violates the prescribed speed.

As shown in Table 3, the reference speeds of candidate paths 1 and 2 are 40.91 km/h and 40.53 km/h, respectively. Since the time required to pass the section of the target vehicle is 60 seconds, the estimated driving speed for the candidate path 1 is 750/60 (m/s) = 45 km/h, and the estimated driving speed for the candidate path 2 is 770/60 (m/h) s) = 46.2 km/h. Comparing this again with the reference speed of each candidate route, the estimated driving speed of the target vehicle is faster than the reference speed in both candidate routes 1 and 2 . Accordingly, the analysis processing unit 24 may determine that the target vehicle is speeding.

On the other hand, the analysis processing unit 24 does not directly compare the reference speed and the estimated travel speed when determining whether or not speeding is present, and does not determine whether or not speeding is based on the magnitude relationship, but estimated travel exceeding a certain range from the reference speed. It can be judged that the speed is overspeed. For example, assuming that the regulation is applied with a margin of 10% for the speeding determination, the adjustment speeds for the speeding of candidate routes 1 and 2 respectively correspond to 45 km/h and 44.58 km/h, respectively. The analysis processing unit 24 may compare the adjustment speed of the candidate route with the estimated running speed of the target vehicle to determine whether or not the vehicle is overspeeding. However, since the estimated driving speed and the adjustment speed are the same for the candidate route 1, it may be determined that the vehicle is overspeeding or not overspeeding in some cases.

Alternatively, the analysis processing unit 24 calculates the degree of speeding for the candidate routes 1 and 2, that is, how much the prescribed maximum speed is violated, and if it exceeds a preset degree (eg, 10%), it is determined that the target vehicle is speeding can judge In the preceding example, the degree of overspeeding of the candidate paths 1 and 2 of the target vehicle is 10.00% (=(45-40.91)/40.91*100) and 13.99% (=(46.2-40.53)/40.53*100), respectively, The analysis processing unit 24 may not determine that the vehicle is over-speeding on the candidate route 1, but may determine that she/she is over-speeding on the candidate route 2.

With respect to the present embodiment using the reference speed, the contents described in the above-described embodiment using the reference time may be applied.

On the other hand, as described above, the image analysis apparatus 2 may operate in conjunction with the photographing apparatus 1 , the operating apparatus 3 , or various types of object detection apparatuses.

The photographing apparatus 1 may photograph the driving image of the aforementioned target vehicle. Also, the object detection apparatus may detect a traveling speed of a vehicle traveling on a road and detect a target vehicle accordingly.

The operating device 3 receives the vehicle information, the estimated candidate route, the reference time or the reference speed, or information on whether overspeeding from the image analysis device 2, displays it on the display, and provides it to the operator. can To this end, the operating device 3 may include an interface for displaying at least one of vehicle information, an estimated candidate route, a reference time or reference speed, or information on whether or not the vehicle is over-speeding. In addition, the interface may display at least one of vehicle information, an estimated candidate route, a reference time or a reference speed, and information on whether or not the vehicle is speeding on the electronic map.

In addition, the operating device 3 receives information about the vehicle, driving information, driving image, etc. from the image analysis device 2, and among traffic information, illegal parking information, speed violation information, signal violation information, and traffic or crime prevention information. At least one may be created or provided as a traffic information system, an illegal parking enforcement system, a speeding enforcement system, a signal violation enforcement system, or a crime prevention system. To this end, the operating device 3 may be interlocked with a traffic information system, an illegal parking and stopping enforcement system, a speeding enforcement system, a signal violation enforcement system, or a crime prevention system.

4 is a flowchart of an image analysis method for determining overspeed in a section related to the present invention. The image analysis method according to the present invention may be performed by the image analysis apparatus 2 or its components.

The image analysis apparatus 2 may obtain vehicle information including a driving image of the vehicle and information about a shooting time of the driving image at a plurality of points on the road ( S410 ). In addition to this, the vehicle information may include at least one of a vehicle number, vehicle type, vehicle driving direction information, vehicle driving speed, traffic state information, whether the driver wears a seat belt, and whether the driver uses a mobile phone.

The image analysis apparatus 2 may estimate a candidate path of a section defined by at least two points with respect to a target vehicle for which vehicle information is obtained from at least two points among a plurality of points ( S420 ).

Then, the image analysis apparatus 2 may calculate a reference time or reference speed of the estimated candidate path ( S430 ). Here, the reference time is the time it takes to travel through each of the candidate routes or partial routes of the candidate route at the prescribed maximum speed of the candidate route or the prescribed maximum speed of each of the partial routes, and the reference speed is the time required to travel through the candidate route for the reference time. speed to pass

The image analysis apparatus 2 may determine whether the target vehicle is speeding within a section by using the reference time or the reference speed. If it is determined that the target vehicle has passed the section within a shorter time than the reference time, the image analysis apparatus 2 may determine that the target vehicle has overspeeded. In addition, when it is determined that the target vehicle has driven the section at a speed faster than the reference speed, the image analysis apparatus 2 may determine that the target vehicle is overspeeding, and the estimated driving speed of the target vehicle is determined by determining the length of each candidate path and the target vehicle. It can be obtained using the time required to pass through the section of . The time required to pass through the section of the target vehicle may be obtained by a difference of the photographing time information of the vehicle obtained at two points.

The image analysis method related to FIG. 4 may include at least some of the contents of the present invention described with reference to FIGS. 1 to 3 as a configuration of the method. For a detailed description, refer to the description related to FIGS. 1 to 3 .

In the above specification, "device" or "system" and its components (vehicle information collection unit 21, route estimation unit 22, reference calculation unit 23, analysis processing unit 24, control unit 25, Although the communication unit 26, the storage unit 27, etc.) have been described as carrying out the invention, the “device” and “system” and components belonging thereto are only names, and the scope of rights is not subordinated thereto. That is, the method or procedure of the present invention may be performed with a name other than an apparatus or a system, and the method or method is performed by software for image analysis or a code readable by a computer or other machine, device, etc. can be

In addition, as another aspect of the present invention, the above-described proposal or operation of the invention is performed by a "computer" (a comprehensive concept including a system on chip (SoC) or (micro) processor, etc.) Code that can be implemented, implemented or executed, or a computer-readable storage medium storing or including the code, or a computer program product, etc. a computer-readable storage medium including a computer program product or a computer program product.

The detailed description of the preferred embodiments of the present invention disclosed as described above is provided to enable any person skilled in the art to make and practice the present invention. Although the above has been described with reference to preferred embodiments of the present invention, it will be understood by those skilled in the art that various modifications and changes can be made to the present invention described in the claims below. Accordingly, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (23)

As an image analysis device for determining the speed of a vehicle section,
a vehicle information collection unit configured to acquire vehicle information including a driving image of the vehicle and information about a shooting time of the driving image at a plurality of points on the road;
A path estimator for estimating a plurality of candidate paths defined as paths connecting the at least two points and consisting of at least one partial path with respect to a target vehicle for which vehicle information is obtained from at least two points among the plurality of points ;
a reference calculator configured to calculate a reference time of each of the plurality of candidate routes as a sum of time required to travel and pass each partial route constituting each of the plurality of candidate routes at a prescribed maximum speed of the partial route; and
and an analysis processing unit configured to determine whether the target vehicle is speeding within a section by using the reference time. delete According to claim 1,
The reference time is a time required to travel and pass through the candidate path or each of the partial paths of the candidate path at the specified maximum speed of the candidate path or the specified maximum speed of each of the partial paths. According to claim 1, wherein the vehicle information collection unit comprises an algorithm for obtaining the vehicle information by analyzing the driving image of the vehicle,
The vehicle information includes at least one of a vehicle number, vehicle type, vehicle driving direction information, vehicle driving speed, traffic state information, whether the driver wears a seat belt, and whether the driver uses a mobile phone. The image analysis apparatus according to claim 1, wherein the vehicle information collecting unit includes a speed detecting means for measuring the speed of the vehicle. According to claim 1, wherein the path estimator,
An image analysis apparatus for determining the candidate route by using the image information of the target vehicle existing in the candidate route, or selecting a removable candidate route from among the plurality of candidate routes when there are a plurality of candidate routes. According to claim 1,
The reference calculation unit,
An image analysis device that interworks with a storage unit that stores information on the length of the partial path between the plurality of points and the specified maximum speed. According to claim 1,
The analysis processing unit compares the reference time with the section transit time obtained from the photographing time information of the target vehicle obtained at the at least two points. The method of claim 1, wherein when the estimated candidate paths are plural,
The analysis processing unit:
An image analysis apparatus for comparing a minimum reference time among reference times of each of the candidate routes and a time required for passing a section obtained from the photographing time information of the target vehicle. According to claim 1,
The analysis processing unit,
When two driving images of a vehicle having time information within a preset time range and having opposite driving directions are detected at the same point among the plurality of points, it is determined whether the vehicle is illegally U-turned. . As an image analysis device for determining the speed of a vehicle section,
a vehicle information collection unit configured to acquire vehicle information including a driving image of the vehicle and information about a shooting time of the driving image at a plurality of points on the road;
A path estimator for estimating a plurality of candidate paths defined as paths connecting the at least two points and consisting of at least one partial path with respect to a target vehicle for which vehicle information is obtained from at least two points among the plurality of points ;
The reference time of each of the plurality of candidate routes is calculated as the sum of the time required to travel and pass each partial route constituting each of the plurality of candidate routes at a prescribed maximum speed of the partial route, and during the reference time, the candidate route a reference calculation unit that calculates a speed for driving and passing through as a reference speed of the candidate route; and
and an analysis processing unit configured to determine whether the target vehicle is speeding within a section by using the reference speed. 12. The method of claim 11,
The reference time is a time required to travel and pass through the candidate path or each of the partial paths of the candidate path at the specified maximum speed of the candidate path or the specified maximum speed of each of the partial paths. 12. The method of claim 11,
The analysis processing unit compares the reference speed with the estimated driving speed of the target vehicle obtained using a section transit time obtained from the photographing time information of the target vehicle. 12. The method of claim 11, wherein when the estimated candidate paths are plural,
The analysis processing unit:
An image analysis apparatus for comparing the estimated driving speeds of each of the candidate paths obtained by using a reference speed of each of the candidate paths and a section transit time obtained from the photographing time information of the target vehicle. As an image analysis system for determining the speed of a vehicle section,
At a plurality of points on the road, vehicle information including a driving image of the vehicle and photographing time information of the driving image is obtained, and for a target vehicle for which vehicle information is obtained at at least two of the plurality of points, the at least It is defined as a path connecting two points, and a plurality of candidate paths composed of at least one partial path are estimated, and each partial path constituting each of the plurality of candidate paths is driven and passed at the specified maximum speed of the partial path. an image analysis apparatus calculating a reference time of each of the plurality of candidate routes as a sum of time required, and determining whether the target vehicle is speeding within a section by using the reference time; and
and an operating device for receiving and displaying the vehicle information, the estimated candidate route, the reference time, or information on whether the vehicle is speeding from the image analysis device. 16. The method of claim 15,
The operating device includes an interface for displaying at least one of the vehicle information, the estimated candidate route, the reference time, and information on whether or not the vehicle is speeding. The image analysis system of claim 16 , wherein the interface displays at least one of the vehicle information, the estimated candidate route, the reference time, and information on whether the vehicle is speeding on an electronic map. 16. The method of claim 15, wherein the operating device comprises:
Receive vehicle information of the target vehicle from the image analysis device to generate at least one of traffic information, illegal parking information, speed violation information, and crime prevention information, or a traffic information system, illegal parking enforcement system, speed control system, or crime prevention system; Interoperable, video analysis system. 16. The method of claim 15,
Further comprising a photographing device for photographing the driving image, the image analysis system. 20. The method of claim 15 or 19,
An image analysis system further comprising an object detection device for detecting a vehicle traveling on the road. As an image analysis system for determining the speed of a vehicle section,
At a plurality of points on the road, vehicle information including a driving image of the vehicle and photographing time information of the driving image is obtained, and for a target vehicle for which vehicle information is obtained at at least two of the plurality of points, the at least It is defined as a path connecting two points, and a plurality of candidate paths composed of at least one partial path are estimated, and each partial path constituting each of the plurality of candidate paths is driven and passed at the specified maximum speed of the partial path. The reference time of each of the plurality of candidate routes is calculated as the sum of the time required, the speed for driving and passing the candidate route during the reference time is calculated as the reference speed of the candidate route, and using the reference speed an image analysis device for determining whether the target vehicle is speeding within a section; and
and an operating device for receiving and displaying the vehicle information, the estimated candidate route, the reference speed, or information on whether or not the vehicle is speeding from the image analysis device. As an image analysis method for determining the speed of a vehicle section,
acquiring vehicle information including a driving image of the vehicle and photographing time information of the driving image at a plurality of points on the road;
estimating, with respect to a target vehicle for which vehicle information is obtained from at least two points among the plurality of points, a plurality of candidate routes defined as routes connecting the at least two points and constituted by at least one partial route;
calculating a reference time of each of the plurality of candidate routes as a sum of time required to travel and pass each partial route constituting each of the plurality of candidate routes at a prescribed maximum speed of the partial route; and
and determining whether the target vehicle is speeding within a section by using the reference time. As an image analysis method for determining the speed of a vehicle section,
acquiring vehicle information including a driving image of the vehicle and photographing time information of the driving image at a plurality of points on the road;
estimating, with respect to a target vehicle for which vehicle information is obtained from at least two of the plurality of points, a plurality of candidate routes defined as routes connecting the at least two points and configured of at least one partial route;
The reference time of each of the plurality of candidate routes is calculated as the sum of the time required to travel and pass each partial route constituting each of the plurality of candidate routes at a prescribed maximum speed of the partial route, and during the reference time, the candidate route calculating a speed for driving and passing through as a reference speed of the candidate route; and
and determining whether the target vehicle is speeding within a section by using the reference speed.

Images