CN102930735A - City real-time traffic and road condition information issuing method based on traffic video - Google Patents
City real-time traffic and road condition information issuing method based on traffic video Download PDFInfo
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Abstract
The invention relates to a city real-time traffic and road condition information issuing method based on a traffic video. The method comprises the following steps of: detecting floating cars in various road sections of a road network, uploading speed information to a background server in real time, and using a traffic video monitoring device to upload traffic dynamic information around all monitoring points to the background server in real time; using the background server to determine a real-time traffic state extraction result according to the sample distribution of the floating cars and the information acquisition state of the traffic video monitoring device, and further dividing traffic and road condition information issuing levels by combining with traffic information; and simultaneously extracting FCD (floating car data) and video road condition information at each issuing level, and issuing to the public based on a video way. According to the method disclosed by the invention, the characteristics of the floating cars and the traffic video monitoring device are fully utilized for complementing each other, thus the accuracy in road traffic state extraction and the information practicality are improved, the video-based city traffic and road condition information issuing is realized, and the maximization of receiving of the traffic information by travelers can be ensured.
Description
Technical field
The present invention relates to transport information issue field, especially a kind of city real-time traffic information dissemination method based on traffic video.
Background technology
At present, the traffic information collection single sources such as artificial or video monitoring that adopt are issued traffic information by modes such as broadcasting, websites more.In recent years, along with reaching its maturity of FCD technology and Video Supervision Technique, provide good basis for studying new traffic information dissemination method, FCD(Floating Car Data) be to utilize the vehicle location change information of Floating Car collection to carry out the system of Real-time Road traffic behavior Dynamic Extraction, utilization with the Floating Car of GPS can the Real-time Collection vehicle displacement information, seasonal effect in time series vehicle location coordinate and map are mated, can obtain the speed data of unsteady vehicle, the spatial averaging of getting all unsteady spot speed of highway section can get the real-time average velocity in highway section, highway section real-time speed in the some cycles is carried out the cycle average velocity that arithmetic mean can obtain road, and then can extract the traffic state data of road.Traffic video monitoring be utilize that the equipment such as image acquisition, transmission, control, demonstration and control software forms to fixed area monitor, the traffic management information system of tracking and information processing, comprise video acquisition, transmission of video and video processing procedure.At the crossing or the highway section video camera is installed, pass the video image that gathers back command centre, process traffic dynamic informations such as can obtaining vehicle flowrate, automobile's instant velocity degree, speed of a motor vehicle assembly average, vehicle classification, occupation rate, average spacing, traffic events through image.
FCD system Negotiation speed computation model can extract real-time system-wide net arterial highway and the net road traffic state of branch road, yet is not having GPS to cover or the less highway section of Covering samples number, just can't Obtaining Accurate road condition information; The system digitalized abstract traffic state information form of FCD can't be accepted understanding fast by vast traveler simultaneously, has reduced information utilization.In addition, compare with the FCD system, traffic video monitoring system by video image provide more accurately, abundant, transport information intuitively, but limited by video monitoring equipment distribution scale, often can only detect important arterial highway or junction traffic situation, a little less than the analysis of overall importance; The external environments such as simultaneously serious inclement weather, light can affect the accuracy of video testing result.
Summary of the invention
The object of the present invention is to provide the city real-time traffic information dissemination method based on traffic video that a kind ofly can improve accuracy that traffic behavior extracts, guarantee the information maximization issued.
For achieving the above object, the present invention has adopted following technical scheme: a kind of city real-time traffic information dissemination method based on traffic video, and the method comprises the step of following order:
(1) Floating Car in each highway section of detection road network is uploaded to background server in real time with velocity information, and traffic video monitoring equipment is uploaded to background server in real time with the traffic dynamic information around all control points;
(2) background server is determined real-time traffic states extraction result according to the information acquisition state of Floating Car sample distribution and traffic video monitoring equipment, in conjunction with transport information, divides traffic information issue rank;
(3) extract simultaneously other FCD of each issue stage and video traffic information, based on video mode the public is issued.
The GPS module is installed on the described Floating Car, and the residing position of GPS module Real-time Feedback vehicle and temporal information are carried out map match in conjunction with the GIS Geographic Information System, and the FCD system calculates the space average wagon flow speed in highway section at set intervals; The space average wagon flow speed data that background server analysis-by-synthesis FCD system gathers is extracted the traffic behavior in each highway section of road network.
Described traffic video monitoring equipment Real-time Feedback video image carries out image to this video image and processes, and Traffic Video Detection System is resolved this traffic characteristic data every 5 minutes statistics traffic characteristic data by video structural; The traffic characteristic data that background server analysis-by-synthesis traffic video monitoring system gathers are extracted the traffic congestion state of each highway section of road network and crossing.
Information acquisition state according to Floating Car sample distribution and traffic video monitoring equipment, the traffic state information that extracts respectively in background server comparative analysis FCD system and the traffic video monitoring system, determine real-time traffic states extraction result, this comparative analysis method is as follows:
(1) if the testing result of FCD system and traffic video monitoring system is same grade, then selects the video analysis result of traffic video monitoring system;
(2) if the testing result of FCD system and traffic video monitoring system differs a grade, and the Floating Car sample rate is then selected the video analysis result of traffic video monitoring system less than threshold value; Otherwise, select the analysis result of FDC system;
(3) if the testing result of FCD system and traffic video monitoring system differs at least two grades, then last 5 seconds video image in the analytical cycle if this video image is clear and legible, is then selected the video analysis result of traffic video monitoring system; Otherwise, select the analysis result of FDC system.
Described transport information comprises control traffic message and traffic event information, and the issuing time of traffic event information is that event response time, event are eliminated time and the random time point of queue clearance in the time; Traffic information is divided into one-level, secondary, three grades three issue grades, and wherein one-level is the difficulty level of can not passing through/pass through, and secondary is current slow grade, and three grades are current normal/free grade.
According to real-time traffic information and divided rank, adopt Streaming Media and image processing techniques, extract and fusion FCD data and real-time road video, selection and the message level scope that each information published method adapts are issued city traffic road condition information based on video mode.
Described FCD system presets the demarcation interval of road condition speed class.
Described traffic characteristic data comprise that vehicle flowrate, vehicle are by, occupation rate, queue length, traffic density, time headway and space headway.
Described traffic video monitoring system preset with the FCD system in the horizontal grade classification of the traffic congestion of identical level interval.
As shown from the above technical solution, the present invention utilizes FCD system acquisition traffic road condition data, utilize simultaneously traffic video monitoring equipment to gather real time traffic data, and by background server the traffic parameter data of homogeneity are carried out the comparison and analysis of traffic behavior, for the video mode distributing traffic information provides basic data.The present invention takes full advantage of Floating Car and traffic video monitoring equipment characteristic, learn from other's strong points to offset one's weaknesses, improve accuracy and information practicality that road traffic state extracts, realized the city traffic road condition information issue based on video, guaranteed the maximization of traveler receiving traffic information.
Description of drawings
Fig. 1 is workflow diagram of the present invention;
Fig. 2 is road-section average travel speed grade classification synoptic diagram of the present invention;
Fig. 3 is road traffic congestion status grade classification synoptic diagram of the present invention;
Fig. 4 is traffic behavior comparative analysis method synoptic diagram of the present invention;
Fig. 5 is the issuing time synoptic diagram of traffic event information of the present invention;
Fig. 6 is information issue rank division method synoptic diagram of the present invention;
Fig. 7 is the urban traffic conditions information published method based on video of the present invention and content rating synoptic diagram.
Embodiment
A kind of city real-time traffic information dissemination method based on traffic video, the method comprises the step of following order: the Floating Car that (1) detects each highway section of road network is uploaded to background server in real time with velocity information, and traffic video monitoring equipment is uploaded to background server in real time with the traffic dynamic information around all control points; (2) background server is determined real-time traffic states extraction result according to the information acquisition state of Floating Car sample distribution and traffic video monitoring equipment, in conjunction with transport information, divides traffic information issue rank; (3) extract simultaneously other FCD of each issue stage and video traffic information, based on video mode the public is issued.As shown in Figure 1.
The GPS module is installed on the described Floating Car, and the residing position of GPS module Real-time Feedback vehicle and temporal information are carried out map match in conjunction with the GIS Geographic Information System, and the FCD system calculates the space average wagon flow speed in highway section at set intervals; The space average wagon flow speed data that background server analysis-by-synthesis FCD system gathers is extracted the traffic behavior in each highway section of road network.Described FCD system presets the demarcation interval of road condition speed class, concrete speed suggestion interval value as shown in Figure 2, unit: km/h.
Described traffic video monitoring equipment Real-time Feedback video image carries out image to this video image and processes, and Traffic Video Detection System is resolved this traffic characteristic data every 5 minutes statistics traffic characteristic data by video structural; The traffic characteristic data that background server analysis-by-synthesis traffic video monitoring system gathers, described traffic characteristic data comprise that vehicle flowrate, vehicle by, occupation rate, queue length, traffic density, time headway and space headway, extract the traffic congestion state of each highway section of road network and crossing.Described traffic video monitoring system preset with the FCD system in the horizontal grade classification of the traffic congestion of identical level interval, as shown in Figure 3.The common method of judging congestion has following five kinds:
The first, detect gateway, current period highway section flow, background server calculates the increment of queue length according to gateway, current period highway section difference in flow, judges congestion status according to the increment of queue length again; The second, in the process that traffic information data is processed, extract average discharge, average velocity and time saturation degree in the same time section, then judge congestion status; The 3rd, in the process that traffic information data is processed, extract the phase place saturation degree of link flow, the interior established standards flow of distance is compared when establishing fixedly, then judges congestion status; The 4th, in the process that traffic information data is processed, extract vehicle Negotiation speed and the occupation rate in site road cross section, in conjunction with historical data in the database, then judge congestion status; The 5th, in the process that traffic information data is processed, extract time headway and occupation rate information, then judge congestion status.
Information acquisition state according to Floating Car sample distribution and traffic video monitoring equipment, the traffic state information that extracts respectively in background server comparative analysis FCD system and the traffic video monitoring system, determine real-time traffic states extraction result, this comparative analysis method is as follows: (1) then selects the video analysis result of traffic video monitoring system if the testing result of FCD system and traffic video monitoring system is same grade; (2) if the testing result of FCD system and traffic video monitoring system differs a grade, and the Floating Car sample rate is then selected the video analysis result of traffic video monitoring system less than threshold value; Otherwise, select the analysis result of FDC system; (3) if the testing result of FCD system and traffic video monitoring system differs at least two grades, then last 5 seconds video image in the analytical cycle if this video image is clear and legible, is then selected the video analysis result of traffic video monitoring system; Otherwise, select the analysis result of FDC system.As shown in Figure 4.
Described transport information comprises control traffic message and traffic event information, and the issuing time of traffic event information is that event response time, event are eliminated time and the random time point of queue clearance in the time, as shown in Figure 5; Traffic information is divided into one-level, secondary, three grades three issue grades, and wherein one-level is the difficulty level of can not passing through/pass through, and secondary is current slow grade, and three grades are current normal/free grade.Described traffic event information is confirmed, and highway section, the place traffic events that the III level occurs or block up below the III level.Traffic related information is divided into three issue grades, and concrete traffic related information issue grade classification is seen Fig. 6.
According to real-time traffic information and divided rank, adopt Streaming Media and image processing techniques, extract and fusion FCD data and real-time road video, selection and the message level scope that each information published method adapts are issued city traffic road condition information based on video mode.The traffic information of issue has the information priority of real-time road video image to select according to the grade priority principle when " live telecast " in the same class information.
In sum, the present invention utilizes FCD system acquisition traffic road condition data, utilize simultaneously traffic video monitoring equipment to gather real time traffic data, and by background server the traffic parameter data of homogeneity are carried out the comparison and analysis of traffic behavior, for the video mode distributing traffic information provides basic data.The present invention takes full advantage of Floating Car and traffic video monitoring equipment characteristic, learn from other's strong points to offset one's weaknesses, improve accuracy and information practicality that road traffic state extracts, realized the city traffic road condition information issue based on video, guaranteed the maximization of traveler receiving traffic information.
Claims (9)
1. city real-time traffic information dissemination method based on traffic video, the method comprises the step of following order:
(1) Floating Car in each highway section of detection road network is uploaded to background server in real time with velocity information, and traffic video monitoring equipment is uploaded to background server in real time with the traffic dynamic information around all control points;
(2) background server is determined real-time traffic states extraction result according to the information acquisition state of Floating Car sample distribution and traffic video monitoring equipment, in conjunction with transport information, divides traffic information issue rank;
(3) extract simultaneously other FCD of each issue stage and video traffic information, based on video mode the public is issued.
2. the city real-time traffic information dissemination method based on traffic video according to claim 1, it is characterized in that: the GPS module is installed on the described Floating Car, the residing position of GPS module Real-time Feedback vehicle and temporal information, carry out map match in conjunction with the GIS Geographic Information System, the FCD system calculates the space average wagon flow speed in highway section at set intervals; The space average wagon flow speed data that background server analysis-by-synthesis FCD system gathers is extracted the traffic behavior in each highway section of road network.
3. the city real-time traffic information dissemination method based on traffic video according to claim 1, it is characterized in that: described traffic video monitoring equipment Real-time Feedback video image, this video image is carried out image to be processed, Traffic Video Detection System is resolved this traffic characteristic data every 5 minutes statistics traffic characteristic data by video structural; The traffic characteristic data that background server analysis-by-synthesis traffic video monitoring system gathers are extracted the traffic congestion state of each highway section of road network and crossing.
4. the city real-time traffic information dissemination method based on traffic video according to claim 1, it is characterized in that: according to the information acquisition state of Floating Car sample distribution and traffic video monitoring equipment, the traffic state information that extracts respectively in background server comparative analysis FCD system and the traffic video monitoring system, determine real-time traffic states extraction result, this comparative analysis method is as follows:
(1) if the testing result of FCD system and traffic video monitoring system is same grade, then selects the video analysis result of traffic video monitoring system;
(2) if the testing result of FCD system and traffic video monitoring system differs a grade, and the Floating Car sample rate is then selected the video analysis result of traffic video monitoring system less than threshold value; Otherwise, select the analysis result of FDC system;
(3) if the testing result of FCD system and traffic video monitoring system differs at least two grades, then last 5 seconds video image in the analytical cycle if this video image is clear and legible, is then selected the video analysis result of traffic video monitoring system; Otherwise, select the analysis result of FDC system.
5. the city real-time traffic information dissemination method based on traffic video according to claim 1, it is characterized in that: described transport information comprises control traffic message and traffic event information, and the issuing time of traffic event information is that event response time, event are eliminated time and the random time point of queue clearance in the time; Traffic information is divided into one-level, secondary, three grades three issue grades, and wherein one-level is the difficulty level of can not passing through/pass through, and secondary is current slow grade, and three grades are current normal/free grade.
6. the city real-time traffic information dissemination method based on traffic video according to claim 1, it is characterized in that: according to real-time traffic information and divided rank, adopt Streaming Media and image processing techniques, extract and fusion FCD data and real-time road video, selection and the message level scope that each information published method adapts are issued city traffic road condition information based on video mode.
7. the city real-time traffic information dissemination method based on traffic video according to claim 2 is characterized in that: described FCD system presets the demarcation interval of road condition speed class.
8. the city real-time traffic information dissemination method based on traffic video according to claim 3 is characterized in that: described traffic characteristic data comprise that vehicle flowrate, vehicle are by, occupation rate, queue length, traffic density, time headway and space headway.
9. the city real-time traffic information dissemination method based on traffic video according to claim 3 is characterized in that: described traffic video monitoring system preset with the FCD system in the horizontal grade classification of traffic congestion of identical level interval.
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