KR20030021777A - Traffic information system using image detector and method thereof - Google Patents

Abstract

PURPOSE: A traffic information system using an image detector and a method thereof are provided, which receives vehicle information per traffic lane and local traffic information through a wireless channel from the image detector and generate traffic condition information and a traffic signal light control signal. CONSTITUTION: According to the traffic information system(100), more than one image input units(110) photograph traveling vehicles per traffic lane on a road and then transmit digital image data in real time. More than one traffic controllers(120) control a number of traffic signal lights(122) by being connected to the traffic signal lights. More than one image detectors(130) are connected to the image input unit and the traffic controller, and compress the digital image data from the image input unit and process the digital image data and analyze the digital image data, and extract vehicle information per traffic lane including the number and speeds and distances between vehicles of traveling vehicles, and transmit the compressed digital image data and the vehicle information per traffic lane wirelessly, and transfer the traffic signal light control signal to the traffic controller. And a traffic information analyzer(140) receives the image data and the vehicle information per traffic lane from the image detectors, and generates traffic condition information, and generates the traffic signal light control signal corresponding to the traffic condition information and then transmits it to the image detectors.

Description

Traffic information system using image detector and method thereof {Traffic information system using image detector and method

The present invention relates to a traffic information system using an image detector and a method thereof, and more particularly, to obtain road image data in real time, compress the image data into a format capable of real-time transmission through a wireless channel, and arrange an image data space. Image segmentation and image analysis by setting image loop and image tracking and image analysis to calculate lane information including lane number, speed and distance of vehicle and local traffic information by intersection. The present invention relates to a traffic information system and a method for managing traffic by generating traffic status information between all roads by wirelessly receiving local traffic information.

In recent years, electronic devices with recognition functions have been actively used in managing traffic. A representative example of the use of electronic devices with a recognition function is the detection of speeding vehicles on the highway and taking photographs of evidence. In most cases, a detection loop is installed on the floor of a road to increase the speed of a moving vehicle. If the speed is calculated physically and the speed exceeds the speed limit, the unmanned surveillance camera performs the function by photographing the vehicle detected.

The loop system that detects the presence, speed, size, etc. of vehicles by laying coaxial lines on the road has the advantage of being able to measure precise speed, but it is difficult to install, expensive, and difficult to maintain, so a large amount of detection loops are installed. Not suitable for analyzing traffic conditions on a wide range of roads.

In addition, there are piezo detectors, ultrasonic detectors, and laser detectors for detecting pressure by the weight of the vehicle using piezoelectric elements, but piezo detectors only perform the function of detecting the presence or absence of a vehicle, and traveling waves such as ultrasonic detectors and laser detectors. Since the detector operates only in one direction, information about an object traveling in an unselected direction is not processed, and it has a problem of lighting that is difficult to correct the measurement angle and speed.

In addition, these detectors only generate local traffic information by detecting only a limited lane or intersection, and install a wide wired network to transmit the generated traffic information. It is difficult to build a comprehensive system that provides traffic situation information.

In many cases, the existing public telephone network is used to transmit traffic information from a detector installed on a road to a control center. However, in this case, there is insufficient bandwidth to transmit a large amount of image information. It is impossible.

Therefore, it is easy to install and maintain at low cost, and it is possible to analyze a lot of traffic information with limited data acquisition, and to transmit data in real time to manage traffic controllers, provide traffic situation information, and crack down on traffic violation vehicles. There is a demand for the development of a comprehensive traffic management system that can perform its functions.

The present invention was created in order to meet the above-described demands, and includes a number of vehicles, a speed, and a distance between vehicles by acquiring image data, analyzing the screen through the image loop, and tracking the vehicles on the screen. Traffic information system using image detector that receives lane information and local traffic information through wireless channel from image detector and image detector that calculates information and local traffic information, and generates and transmits traffic status information and traffic signal control signal. And a traffic management method.

1 is a block diagram schematically illustrating a traffic information system using an image detector according to the present invention connected to a client through a wired or wireless network.

2 is a view illustrating a state in which an image detector of a traffic information system according to the present invention is installed in a traffic controller on an intersection and photographs a road.

3 is a view illustrating a plurality of image detectors of a traffic information system according to the present invention connected to a traffic information branch installed in a control center through a wireless channel.

4 is a block diagram schematically showing an internal configuration of an image detector according to the present invention.

5 illustrates a plurality of image loops set for each lane on a data array space of an image photographed by the image detector according to the present invention.

FIG. 6 illustrates elements considered in the installation of the image input device of the image detector according to the present invention to correct the coordinates of the image data with the distance on the actual road.

7 schematically shows the configuration of an image loop set on a screen by an image detector according to the present invention.

8 illustrates an example in which an image loop set on a screen by an image detector according to the present invention is used for each screen frame for image analysis.

9 is a block diagram schematically illustrating an internal configuration of a traffic information analyzer of a traffic information system using an image detector according to the present invention and a form in which a client is connected through a wired or wireless network.

10 is a flowchart illustrating a first method of image detection and traffic situation management according to the present invention.

11 is a flowchart illustrating a second method of image detection and traffic situation management according to the present invention.

<Explanation of symbols for main parts of drawing>

100: traffic information system using image detector

110: video input device 120: traffic controller

122: traffic signal 130: image detector

140: traffic information analyzer 200: wired network

300: client

In order to achieve the above object, a traffic information system using an image detector according to the present invention comprises at least one image input unit for transmitting the digital image data in real time by taking a moving vehicle for each lane on the road; At least one traffic controller connected in wire with a plurality of traffic signals to control the traffic signals; It is connected to the video input device and the traffic controller by wire, compresses the digital video data inputted from the video input device, processes and analyzes the digital video data, and includes the number, speed, and distance between the moving vehicles by the analyzed video data. One or more image detectors for extracting lane-specific vehicle information, wirelessly transmitting compressed digital image data and lane-specific vehicle information, and wirelessly receiving a traffic signal control signal and transmitting the traffic signal to a traffic controller; And the traffic data of each lane and the road, including the connection section between the regions where the image detector is installed by wirelessly receiving the image data and the lane-specific vehicle information from a plurality of image detectors, and analyzing the vehicle-specific vehicle information. Calculate and statistically process average speed and road occupancy rate to generate traffic status information, provide video data and traffic status information to client, generate traffic signal control signal corresponding to traffic status information, and transmit wirelessly to video detector. Includes a traffic information analyzer.

In order to achieve the above object, a method of generating traffic situation information by analyzing image data according to the present invention and managing a traffic controller includes (a) setting the size of a detection area on an actual road and coordinates pixels on a screen. Correcting the distance between pixels to a predetermined distance so that the distance on the screen can be converted into the distance on the actual road in units of units; (b) the image detector acquires image data by real-time photographing a road for each lane at a predetermined number of frames per second, and generates vehicle information for each lane and compresses the image data by setting the image loop and analyzing the image data; (c) the image detector transmits the generated lane-specific vehicle information and the compressed image data to the traffic information analyzer through a wireless network, and the traffic information analyzer generates traffic status information and traffic signal control signals; And (d) the traffic information analyzer wirelessly transmitting the traffic signal control signal to the image detector, and the image detector transferring the wirelessly transmitted traffic signal control signal to the traffic controller to control the traffic signal.

Hereinafter, a traffic information system using an image detector according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram schematically illustrating a traffic information system using an image detector 130 according to the present invention connected to a client 300 through a wired or wireless network.

According to FIG. 1, the traffic information system using the image detector 130 according to the present invention includes an image inputter 110, a traffic controller 120, an image detector 130, and a traffic information analyzer 140.

Image input unit 110 is a device for transmitting the digital image data in real time by photographing the moving vehicle for each lane on the road, it is preferable that a plurality is installed over the road so that the road can be photographed.

As the image inputter 110, a CCD camera which is widely used at present may be used.

CCD (Charge Coupled Device) refers to a charge-coupled device or a solid-state image pickup device, and an image sensor with an integrated circuit that converts light energy input through a lens into an electrical signal (converts the amount of light into the amount of charge). The amount of light can be detected using. In other words, the CCD has a constant array of transistors that react according to the intensity of light, and information of each transistor is collected to form an overall image. The pixel is a minimum individual unit (photo diode) inside the CCD capable of recognizing an image, and the larger the number, the more accurately the image can be recognized.

In order to be associated with the image detector 130, the image input unit 110 should be selected in consideration of the resolution, illuminance, supportable color level, the number of shot frames, the integration distance of the lens, and the auto focus function according to the pixel (pixel).

The traffic controller 120 is a device for controlling a plurality of traffic signals connected by wire, and is usually installed in a steel box-shaped housing located in an area of an intersection. The existing traffic controller is connected to the control center so that it can be controlled by the control center, but it is only controlled by the manager of the control center only in certain cases, and the time is set so that the signal blinks at regular intervals.

The image detector 130 is connected to the image inputter 110 and the traffic controller 120 by wire, compresses the digital image data input from the image inputter 110, and analyzes the digital image data by image processing.

In addition, the image detector 130 extracts lane-specific vehicle information including the number, speed, and distance of the moving vehicle based on the analyzed image data, and compares the compressed digital image data and the lane-specific vehicle information with the traffic information analyzer 140. Wireless transmission. The image detector 130 receives the traffic signal control signal from the traffic information analyzer 140 and transmits it to the traffic controller 120.

The traffic information analyzer 140 may wirelessly receive image data and lane-specific vehicle information from a plurality of image detectors 130, and may include a connection section between regions where the image detector 130 is installed by analyzing the lane-specific vehicle information. Traffic status information is generated by calculating / statistically processing traffic volume by lane and road, road average speed and road occupancy between roads.

In addition, the traffic information analyzer 140 provides image data and traffic situation information to the client 300, generates a traffic signal control signal corresponding to the traffic condition information, and wirelessly transmits the generated traffic signal to the image detector 130. Therefore, the traffic controller 120 can control the traffic signal in real time according to the traffic situation.

The traffic information analyzer 140 may provide traffic status information to the client 300 through a wired or wireless network (eg, the Internet and a mobile communication network), which will be described later.

The data generated by the image input unit 110, the image detector 130 and the traffic information analyzer 140 according to the present invention will be described in stages as follows.

The image inputter 110 photographs a road and generates image data. The image detector 130 recognizes an image through the image data and numerically analyzes the image to generate lane-specific vehicle information limited to the moving vehicle. Here, the lane-specific vehicle information may include information related to recognition of the vehicle itself, speed information, inter-vehicle distance information, and count information.

The image detector 130 may further include a function of generating local traffic information limited to the intersection by the generated lane information of the lane, and the local traffic information may be converted into an average value such as the share of the road and the average vehicle speed of each intersection. Include traffic by intersection.

The image detector 130 may manage the traffic controller 120 by directly generating a traffic signal control signal when generating local traffic information.

The traffic information analyzer 140 wirelessly transmits vehicle information for each lane from the image detectors 130 of various regions (when local traffic information is generated) and transmits traffic information of the entire road by integrating and analyzing the traffic information. Calculate The traffic information analyzer 140 generates a traffic signal control signal based on the traffic situation information and wirelessly transmits it to the image detector 130 installed at the intersection, and the image detector 130 transmits the control signal to the traffic controller 120 for traffic. Control the signal.

2 illustrates a state in which the image detector 130 of the traffic information system according to the present invention is installed in the traffic controller 120 on an intersection to photograph a road.

As illustrated in FIG. 2, the image input unit 110 of the image detector 130 is installed in a plurality of intersections and photographs a plurality of lanes. The image detector 130 may be installed in the housing of the traffic controller 120.

3 is a view illustrating a plurality of image detectors 130 of the traffic information system 100 according to the present invention connected to a traffic information analyzer installed in a control center through a wireless channel.

4 is a block diagram schematically showing the internal configuration of the image detector 130 according to the present invention.

Referring to FIG. 3, the plurality of image detectors 130 installed at an intersection transmits road image data, lane-specific vehicle information, and local traffic information for each intersection to a traffic information analyzer 140 installed at a central control center through a wireless channel. . As described above, the traffic information analyzer 140 integrates this to generate traffic status information and traffic signal control signals of all roads. The control signal is wirelessly received by the image detector 130 and transmitted to the traffic controller 120. Here, in the case where the road configuration is a simple area, the image detector 130 is a traffic controller (B) as a control signal generated by the local traffic information of the image detector 130 instead of the traffic situation information of the traffic information analyzer 140. 120, which will be described later.

Image input unit 110 for generating digital image data, image analysis means 134 of the image detector 130 for generating lane-specific vehicle information, data analysis means 135 of the image detector 130 for generating local traffic information And it should be noted that the four components of the traffic information analyzer 140 may be configured in various embodiments depending on the shape of the intersection, traffic conditions, and the like.

For example, in addition to the embodiments of the accompanying drawings, the image detector 130 is configured together with the image input unit 110 in one housing, and the data analyzing means 135 of the image detector 130 is configured to be external to a plurality of image detectors. It is connected to the wire 130 and serves as a first server for generating local traffic information, the traffic information analyzer 140 may be configured to perform the role of a second server for generating traffic situation information between the road light bulbs. have. However, despite the constitutive probability, the function of each element does not change, so it should be noted that the technical spirit of the present invention should be kept in mind.

According to Figure 4, the image detector 130 of the traffic information system 100 according to the present invention is the interface 131, pre-processing means 132, image analysis means 134, data analysis means 135, traffic control means 136, image compression means 133 and data communication means 137.

The interface 131 is connected to the traffic controller 120 and the plurality of image inputters 110 by wire, and a coaxial RF cable may be used as a connection means. The interface 131 classifies and receives digital image data for each of the plurality of image inputters 110 and controls the traffic signal generated by the data communication means 137 from the traffic information analyzer 140 or generated in the traffic control means 136. The signal is transmitted to the traffic controller 120.

The interface 131 provides the received digital image data to the preprocessing means 120 and the image compression means 133, respectively.

The preprocessing means 132 performs a preprocessing process so that the image analyzing means 134 smoothly recognizes the image by performing intermediate value filtering and average value filtering on the image data input from the image inputter 110. The image analysis means 134 may maximize the image recognition function even when the degradation of the image quality due to the reflection and the bad weather caused by the illumination through the preprocessing process.

The image analyzing means 134 numerically calculates the image data by dividing an array space of the filtered image data and setting an image loop. The image analyzing means 134 recognizes the vehicle based on the calculated value, tracks the movement of the vehicle, counts the number of the moving vehicles, and calculates lane-specific vehicle information including the speed and the distance between the vehicles. It demonstrates in detail with reference.

5 illustrates a plurality of image loops set for each lane on a data array space of an image captured by the image detector 130 according to the present invention.

FIG. 6 illustrates elements considered in the installation of the image input unit 110 of the image detector 130 according to the present invention in order to correct the coordinates of the image data with the actual distance on the road.

FIG. 7 schematically illustrates a configuration of an image loop set on the screen by the image detector 130 according to the present invention.

The image loop refers to reference lines of data processing set on a data array space of a screen in order to recognize a moving vehicle and calculate a speed. It is preferable to set one image loop per lane (10 in FIG. 5), and to form a predetermined number of dividing lines (E in FIG. 7) on the X-axis in order to partially perform the image processing, calculate the moving distance of the vehicle. In order to achieve this, a coordinate value (D of FIG. 7) is provided as a screen pixel unit in which the actual distance on the road of a predetermined value is set on the Y axis.

As described above, in order to divide the data array space of the screen, the image input unit 110 should be installed at an optimized height (B of FIG. 6) and an angle (C of FIG. 6), for example, an installation height (B of FIG. 6). It is preferable to be provided to have a photographing area (A and D in Fig. 6) at a distance corresponding to 10 times. The image analyzing means 134 is provided with an administrator panel to receive the distance value and initialize (correct) the converted value.

For example, if the Y-axis (D in FIG. 7) has 100 coordinates and the detection area on the actual road is set to 10 meters, the image analysis means 134 converts the distance between pixels constituting one coordinate into 0.1 meters. The dividing line on the X-axis is used for distributed processing (particularly advantageous in the case of a plurality of vehicles such as driving along a lane) for data operation between pixels in image tracking.

The image analyzing unit 134 recognizes the vehicle by comparing (eg, logically calculating the numerical value of each pixel) the preset road screen data array space with the road screen data array space when the vehicle enters the vehicle.

According to FIG. 7, the image loop includes an entry detection unit A for starting tracking of a recognized vehicle, a tracking unit B for executing pattern selection and pattern tracking for each screen frame, and a vehicle for tracking a plurality of recognized vehicles. It consists of a deviation detection unit (C) to end the tracking of.

The entry detection unit A and the departure detection unit C are set in such a way that their size is reduced to about 1/3 of the entire width of the video loop in order to prevent the vehicle from being duplex when the vehicle changes lanes (20 in FIG. 5). . The entry detection unit (A), the tracking unit (B) and the departure detection unit (C) have a status flag on the program. When the vehicle is recognized in the default initial state, 'DETECT', 'TRACK' and 'STOP' is set to perform each function.

8 illustrates an example in which an image loop set on the screen by the image detector 130 according to the present invention is used for each screen frame for image analysis.

The image analyzing unit 134 calculates the speed of the vehicle as a correction value of the time unit error and pixel distance due to the limitation of the number of frames, and a pattern selection frame for extracting a feature of the vehicle from among the frames (one frame). ~ m frames). This is to prevent an error in speed calculation due to a plurality of vehicles, noise, and initial vehicle recognition error.

According to FIG. 8, the image analyzing means 134 sets pattern selection up to m frames, and sets pattern tracking for the remaining frames (corresponding to m + 1 frames to m + n frames).

The velocity calculation can be formulated as follows.

In the above formula, since time is measured in units of 0.01 seconds, the value is multiplied by 100, and the value '3.6' is multiplied in order to convert the speed into the speed per second.

A partial example of an algorithm that handles speed calculation is as follows.

"if (car head distance from previous object (vehicle)> maximum vehicle length)

{Calculate speed for statistical processing and occupancy calculation and data output

}

else

{Discard measured data

} "

The image analyzing means 134 provides the lane information of the vehicle from which the recognized feature of the vehicle is extracted to the data analyzing means 135. The data analyzing means 135 may classify the vehicle types based on the lane information.

The image compression means 133 receives the image data from the preprocessing means 132 and compresses the image data into a format capable of real time transmission through a wireless channel. As such a compression format, a JPEG (Joint Photographic Expert Group), a multimedia encoding international standard MPEG (Moving Picture Experts Group) 1, MPEG2, MPEG4, etc. may be used. In particular, unlike MPEG1 / 2, MPEG4 encodes a screen in object units instead of compressing the screen, thereby enabling object-based editing. In addition, MPEG-4 is suitable for transmission of video data through a mobile communication network (a format suitable for IMT-2000) and the Internet since it is resistant to transmission errors.

The data communication means 137 transmits the image data compressed by the image compression means 133 and the lane-specific vehicle information analyzed by the image analysis means 134 to the traffic information analyzer 140 installed in the control center through a wireless channel. The control signal is received from the traffic information analyzer 140 and provided to the interface 131. In addition, the data communication means 137 receives the local traffic information from the data analysis means 135 and transmits it to the traffic information branch 140 through a wireless channel.

In transmitting lane-specific vehicle information through a wireless channel, the data communication means 137 uses a cdma (code-division multiple access) 2000 method or an IMT2000 method. The cdma2000-1x uses a frequency band of 1.8 to 2 GHz. The transmission speed is up to 144Kbps, so the cdma2000-1x module can provide high quality color video of road image data.

The data analysis means 135 receives the vehicle information for each lane from the image analysis means 134 and generates local traffic information by averaging and comparing the traffic volume for each lane and the intersection. As described above, the image analyzing means 134 counts the number of frames and the number of pixels during the pattern tracking section and corrects the distance to calculate individual vehicle speeds (lane-specific vehicle information). The vehicle speeds (local traffic information) of the entire road are obtained by statistically processing the speeds (lane-specific vehicle information) of a plurality of vehicles calculated from the tracking pattern of the image loop. For example, a weighted average may be used to statistically quantify numbers.

The data analyzing unit 135 receives vehicle information for each lane from the image analyzing unit 134, identifies a vehicle type, and detects a leased line violation by recognizing a dedicated line mark of a preset road screen data array space. In addition, the data analysis unit 135 recognizes illegal parking vehicles, detects a signal violation vehicle by comparing a control signal with a movement of the vehicle, and generates traffic violation information including a plurality of detection image data related to traffic violations. do.

The traffic control means 136 generates a traffic signal control signal corresponding to the local traffic information and transmits it to the interface 131 so that the traffic controller 120 can control the traffic signal.

The interface 131 may be connected to the communication module of the traffic controller 120 by using an RS-232 cable to transmit a control signal at a high speed to the traffic controller 120, and may include a universal asynchronous receiver / transmitter (UART). Synchronous transceiver) may provide an RS-232 interface to the communication module of the traffic controller 120.

9 is a block diagram schematically illustrating an internal configuration of the traffic information analyzer 140 of the traffic information system 100 using the image detector 130 and a connection between the client 300 and a wired or wireless network. to be.

9, the traffic information analyzer 140 according to the present invention is a data communication means 141, traffic situation analysis means 142, traffic information providing means 143, traffic control means 144, traffic violation management means 145 and database 146.

As described above, the data communication means 141 averages and compares the vehicle information per lane including the number, the speed, and the distance of the moving vehicle, the traffic amount by lane and the intersection, in real time as described above. The generated local traffic information and road image compression data are transmitted through a wireless channel.

In addition, the traffic situation analysis means 142 performs traffic analysis by performing integrated analysis of lane-specific vehicle information and regional traffic information (if the image detector 130 does not have the data analysis means 135, only lane-specific vehicle information is transmitted). Generates situation information, and the traffic control means 144 generates a traffic signal control signal based on the traffic situation information. The data communication means 141 receives a control signal and transmits the control signal to the image detector 130 installed in the traffic controller 120 through a wireless channel, and includes a plurality of image data related to the traffic violation from the image detector 130. Receive traffic violation information.

As described above, the traffic situation analysis means 142 analyzes the vehicle information of each lane and the regional traffic information, and the traffic volume and traffic of each lane and road between roads and roads including the connection section between the regions where the image detector 130 is installed. The traffic speed information is generated by calculating and statistically processing the average speed and road occupancy rate.

The traffic information providing means 143 generates the data calculated by the traffic condition analysis means 142 as image information combined with text information, voice information, and geographic information provided by the geographic information system, and generates the generated image information and text information. The transmission target information is selected from the client 300 through the wired network 200 and transmitted to the client 300 through the wired network 200. In addition, the traffic information providing means 143 may transmit the above-mentioned data to the data communication means 141 to transmit wirelessly to the client 300.

Examples of the client 300 include an airwave broadcasting station, an internet broadcasting station (site operator), a content provider (CP), and a mobile communication service provider. In the case of providing traffic status information to the mobile communication service provider, the data communication means ( Wireless transmission may be performed through the cdma modules 137 and 141. Since the traffic information system 100 according to the present invention provides the traffic status information to each client 300, a process of processing the information is irrelevant to the technical idea of the present invention, and thus description thereof will be omitted.

The database 146 stores image data, lane-specific vehicle information, local traffic information, and traffic situation information.

The traffic violation management means 145 receives the traffic violation information from the data communication means 141, reads the number of the traffic violation vehicle, and stores and manages the traffic violation date and time and the image data at the time of the violation in the database 146. The process of reading the license plate consists of three phases: number plate area extraction, character segmentation, and character recognition. Quadrature) Extracts the region by combining the Q components of the color model. In addition, character segmentation is possible by performing line-by-line searching using a point where the license plate is located at the bottom of the image and continuously displayed in a predetermined region of the frame, and the boundary of the numeric region is estimated by horizontal / vertical projection.

Hereinafter, an image detection and traffic situation management method according to the present invention will be described in detail with reference to the accompanying drawings.

10 is a flowchart illustrating a first method of image detection and traffic situation management according to the present invention.

First, the image analyzing means 134 sets the size of the detection area on the actual road and corrects the distance between the pixels to a predetermined distance so that the distance on the screen can be converted into the distance on the actual road using the pixels of the screen as coordinate units ( S100).

Subsequently, the image analyzing means 134 acquires image data by real-time photographing the roads for each lane at a predetermined number of frames per second, and generates vehicle information for each lane by setting the image loop and analyzing the image data (S110).

In addition, the video compression means 133 is compressed in the MPEG4 method capable of transmitting video (S140) to transmit the image data of the road (S120), the data communication means 137 is the image analysis means 134 and the image compression means The vehicle receives the lane information and the compressed image data from 133 and transmits it to the traffic information analyzer 140 through the wireless network (S130).

The traffic information analyzer 140 analyzes the above-described lane-specific vehicle information to generate traffic situation information, and generates a traffic signal control signal based on the traffic situation information (S150).

Next, the traffic information analyzer 140 transmits the traffic signal control signal to the image detector 130 through the CDMA wireless channel (S180), and the image detector 130 transmits the transmitted traffic signal control signal to the traffic controller 120. Transfer to control the traffic signal (S190).

In addition, the traffic information providing means 143 of the traffic information analyzer 140 receives a road from the client 300 connected through the wired / wireless network (S160) and transmits the corresponding video data and traffic situation information in real time or in a database 146. In search for and provide (S170).

11 is a flowchart illustrating a second method of image detection and traffic situation management according to the present invention.

First, the image analyzing means 134 sets the size of the detection area on the actual road and corrects the distance between the pixels to a predetermined distance so that the distance on the screen can be converted into the distance on the actual road using pixels of the screen as coordinate units ( S200).

Subsequently, the image analyzing means 134 acquires the image data by real-time photographing the roads for each lane at a predetermined number of frames per second, and generates the vehicle information for each lane by setting the image loop and analyzing the image data (S210).

The image detector 130 generates local traffic information through the generated lane information and generates a traffic signal control signal according to the local traffic information (S220). The image detector 130 transmits the traffic signal control signal to the traffic controller 120 to control the traffic signal (S230).

Meanwhile, the plurality of image detectors 130 compress the image data (S240) and transmit the image data to the traffic information analyzer 140 of the control center through the wireless channel together with the lane information and the local traffic information (S250). The analyzer 140 generates traffic situation information by integrating / analyzing a plurality of local traffic information (S260).

Finally, the traffic information providing means 143 of the traffic information analyzer 140 provides traffic status information and image data through wired / wireless channels according to a request of the client 300 (S270).

The present invention has been described above with reference to the preferred embodiments, which are merely examples and are not intended to limit the present invention, and those skilled in the art to which the present invention pertains do not depart from the essential characteristics of the present invention. It will be appreciated that various modifications and applications are not possible that are not illustrated above. For example, each component specifically shown in the embodiment of the present invention can be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

According to the present invention, by analyzing the image data of a certain number of frames to generate vehicle information for each lane including the number of vehicles, speed, distance between vehicles, local traffic information of the intersection and the generated information to the control center through the wireless channel It can be provided.

In addition, according to the present invention, it is possible to generate traffic situation information and traffic violation information of all sections of the road according to the wirelessly transmitted image data, lane-specific vehicle information and local traffic information, and to wirelessly transmit a control signal based on the traffic condition information to the traffic controller. It becomes possible.

Claims (13)

In the traffic information system for generating vehicle information by lane, intersection traffic information by intersection, traffic status information between roads and traffic signal control signal, At least one image input unit for photographing a moving vehicle for each lane on a road and transmitting digital image data in real time; At least one traffic controller connected in wire with a plurality of traffic signals to control the traffic signals; It is connected to the video input device and the traffic controller by wire, compresses the digital video data inputted from the video input device, processes the digital video data, analyzes the digital video data, and analyzes and analyzes the digital video data. One or more image detectors extracting lane-specific vehicle information including wireless transmission of the compressed digital image data and lane-specific vehicle information, and wirelessly receiving a traffic signal control signal and transmitting the received traffic signal control signal to the traffic controller; And The traffic volume of each lane and road between roads including the connection section between the areas where the image detector is installed by receiving the image data and the lane-specific vehicle information wirelessly from a plurality of the image detectors, and analyzing the vehicle-specific vehicle information; The traffic speed information is generated by calculating and statistically processing the average speed and the road occupancy of the moving vehicle, and generating a traffic signal control signal corresponding to the traffic condition information, and including a traffic information analyzer for wireless transmission to the image detector. Traffic information system using an image detector. An interface connected to an image input unit and a traffic controller by wire, classifying and receiving image data from the image input unit, and transmitting a control signal to the traffic controller; Pre-processing means for filtering image data input from the interface for image recognition; Image compression means for receiving image data from the interface and compressing the image data into a format capable of real-time transmission through a wireless channel; Divide the space of the filtered image data and set the image loop to numerically compute the image data, recognize the vehicle based on the calculated value, track the movement of the vehicle, count the number of moving vehicles, and calculate the speed and the distance between them. Image analysis means for calculating lane-specific vehicle information comprising; And The image data compressed by the image compression means and the lane-specific vehicle information analyzed by the image analysis means are transmitted to a traffic information analyzer through a wireless channel, and a traffic signal control signal is transmitted from the traffic information analyzer to provide the interface. And an image detector comprising data communication means. The method of claim 2, wherein the image analysis means Comparing a predetermined road screen data array space and a road screen data array space at the time of vehicle entry, the vehicle is recognized, and the image loop is an entry detection unit for starting the tracking of the recognized vehicle and tracking the plurality of recognized vehicles. For example, a tracking unit which executes pattern selection and pattern tracking for each screen frame and a deviation detection unit for terminating the tracking of the vehicle are configured. The image loop is configured on the X axis to perform image processing for the pattern selection and pattern tracking. An image detector having a coordinate value in units of screen pixels in which a predetermined number of dividing lines are formed and an actual distance on a road of a predetermined value is set on a Y axis in order to calculate a moving distance of a vehicle. The method of claim 3, wherein the image analysis means In detecting the speed of the moving vehicle through the image loop, converting the moving distance of the vehicle between screen frames as the moving distance on the actual road as the screen pixel coordinate value and calculating the time corresponding to the number of screen frames required for moving the vehicle. The image detector, characterized in that for calculating the speed of the moving vehicle. The method of claim 2, Data analysis means for receiving road vehicle information from the image analyzing means, calculating road occupancy, and generating local traffic information by averaging and comparing traffic volume for each lane and intersection; And And a traffic control means for generating a traffic signal control signal corresponding to the local traffic information and transmitting the generated traffic signal control signal to the interface. The method of claim 4, wherein The image analyzing means compares the preset road screen data array space with the road screen data array space when the vehicle enters, recognizes the vehicle, and provides vehicle information for each lane extracting the recognized characteristics of the vehicle. The data analyzing means receives vehicle information of each lane from the image analyzing means, detects a vehicle type, detects a leased line violation by recognizing a leased line mark of a predetermined road screen data array space, recognizes illegal parking vehicle, recognizes illegal parking vehicle, and the control signal Detect a signal violation vehicle by comparing the movement of the vehicle with the vehicle, and generate traffic violation information including a plurality of image data related to the violation, And the data communication means transmits the traffic violation information to the control center through a wireless channel. Receive vehicle information including lane number and speed and distance of moving vehicles and image compression data of road through real time from multiple image detectors through wireless channel, and wirelessly transmit traffic signal control signal to the image detector Communication means; Analyze the vehicle information for each lane to average the traffic volume for each lane and the intersection, and generate the regional traffic information, and analyze the regional traffic information to analyze the road traffic, including the connection section between the regions where the image detector is installed Traffic situation analysis means for generating traffic situation information by calculating and statistically processing traffic volume by lane and road, average speed of a moving vehicle, and road occupancy rate; The data calculated by the traffic situation analysis means is generated as image information combined with text information, audio information, and geographic information provided by the geographic information system, and is transmitted from the generated image information, text information, audio information, and the image data. Traffic information providing means for receiving information from the client and transmitting the information to the client through a wired network and wirelessly transmitting the data through the data communication means; Traffic control means for generating a traffic signal control signal corresponding to the traffic condition information and transmitting it to the data communication means; And And a database for storing the image data, lane-specific vehicle information, and traffic situation information. According to claim 7, wherein the traffic information providing means Traffic information analyzer, characterized in that for selecting the region from any one or more of the mobile communication operators, airwave broadcasting stations, content providers and Internet broadcasting stations to transmit the corresponding video information, text information, audio information and video data. The method of claim 7, wherein The data communication means receives traffic violation information from the image detector, Traffic information management means for receiving traffic violation information from the data communication means, the traffic violation management means for reading the number of traffic violation vehicles, and storing and managing the traffic violation date and time in the database in the database Analyzer. In the method of generating traffic status information by analyzing the image data and managing the traffic controller, (a) setting the size of the detection area on the actual road and correcting the distance between the pixels to a predetermined distance so that the distance on the screen can be converted into the distance on the actual road using pixels of the screen as coordinate units; (b) the image detector acquires image data by real-time photographing a road for each lane at a predetermined number of frames per second, and generates vehicle information for each lane and compresses the image data by setting the image loop and analyzing the image data; (c) the image detector transmitting the generated lane-specific vehicle information and the compressed image data to a traffic information analyzer through a wireless network, wherein the traffic information analyzer generates traffic status information and a traffic signal control signal; And (d) wherein the traffic information analyzer wirelessly transmits a traffic signal control signal to the image detector, and the image detector transmits a wirelessly transmitted traffic signal control signal to a traffic controller to control the traffic signal. Video detection and traffic management. The method of claim 10, wherein step (c) And selecting a road from a client connected through a wired / wireless network and providing corresponding image data and traffic situation information to the client. In the method of generating traffic status information by analyzing the image data and managing the traffic controller, (a) setting the size of the detection area on the actual road and correcting the distance between the pixels to a predetermined distance so that the distance on the screen can be converted into the distance on the actual road using pixels of the screen as coordinate units; (b) the image detector acquires image data by real-time photographing a road for each lane at a predetermined number of frames per second, and generates vehicle information for each lane by setting an image loop and analyzing the image data; And (c) the image detector generating local traffic information through the vehicle information for each lane, generating a traffic signal control signal according to the local traffic information, and transmitting the traffic signal to a traffic controller to control the traffic signal. Video detection and traffic management. The method of claim 12, (d) the plurality of image detectors compressing image data and transmitting the compressed image data to the traffic information analyzer through the lane-specific vehicle information, local traffic information, and a wireless channel; And (e) The traffic information analyzer may further include the step of integrating / analyzing a plurality of local traffic information to generate traffic status information, and providing the traffic status information and image data through a wired or wireless channel at the request of a client. Characterized by video detection and traffic conditions management method.