Intersection Vehicle Tracking via Directional Camera Selection
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Solution Overview
Problem
Current OD surveys are costly and time-consuming due to the need for extensive camera installations to track vehicles turning at intersections, and existing automatic traffic measurement systems can only provide descriptive data at specific camera locations, lacking comprehensive tracking capabilities.
Innovation Solution
A moving body tracking system comprising a first camera capturing images of vehicles entering an intersection and multiple second cameras at destination locations, with a moving direction determining part and a path specifying part to determine the moving direction and select the appropriate second camera to track the vehicle's path efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple second cameras are installed at all possible destination locations to track vehicles turning at intersections, then tracking completeness is improved, but system cost and device complexity increase significantly
Solution Approach 1:
The system performs preliminary determination of the vehicle's moving direction using the first camera before selecting which second camera to activate. This advance preparation allows the system to pre-identify the appropriate destination camera based on the detected turning direction, avoiding the need to install and operate cameras at all possible locations simultaneously.
Solution Approach 2:
The invention extracts only the necessary camera from the set of all possible second cameras based on the determined moving direction. Instead of using all cameras at all destinations, the system selectively activates only the camera at the predicted destination location, reducing the effective number of cameras from potentially dozens to just one or a few at any given time.
2Measurement precision
If extensive camera installations are deployed to capture all vehicle paths at intersections, then path tracking accuracy is improved, but cost and installation time increase
Solution Approach 1:
The system determines the vehicle's moving direction in advance using the first camera and uses this information to predict which second camera will capture the vehicle. This preliminary determination ensures that the correct camera is selected before the vehicle reaches the intersection, maintaining high tracking accuracy without requiring cameras at every possible location.
Solution Approach 2:
The moving direction determination result acts as an intermediary that connects the first camera's observation to the selection of the appropriate second camera. This intermediary information enables the system to bridge the gap between the entry point camera and the destination camera, ensuring accurate path tracking with minimal camera installations.
3Loss of information
If cameras are installed at all intersection points to capture turning vehicles, then data collection comprehensiveness is improved, but system cost increases
Solution Approach 1:
The system performs preliminary determination of the vehicle's destination direction using the first camera's captured data. Based on this preliminary analysis of the turning direction, the system identifies which second camera will be needed to complete the data collection, ensuring comprehensive information gathering without deploying the full network of cameras.
Solution Approach 2:
The invention extracts only the essential camera data needed for complete path tracking by selecting the specific second camera corresponding to the determined moving direction. This extraction approach ensures that all necessary information about the vehicle's path is captured while avoiding the overhead of maintaining and operating a comprehensive camera network at all intersection points.
Data Source
AI summary
A moving body tracking system, comprising: a first camera that captures image(s) of moving body entering an intersection, a plurality of second cameras installed in a plurality of locations set as destinations of the moving body entering the intersection, a moving direction determining part that determines a moving direction of the moving body entering the intersection due to a change in direction of the moving body based on captured data by the first camera, and a path specifying part that selects the second camera based on the moving direction of the moving body, searches a frame in which the specified moving body was captured from captured data by the second camera, and specifies a path of the moving body.