A highway video monitoring method for precise positioning based on active spatiotemporal control
In response to the challenges faced by traditional passive artificial monitoring modes in unleashing the monitoring capabilities of PTZ(Pan/Tilt/Zoom)cameras,a highway video monitoring method for precise positioning is proposed.This method involves quantitatively matching different preset positions of cameras with milestone numbers,achieving active spatiotemporal control through customized query conditions such as time and milestone numbers.First,research is conducted on camera calibration techniques for comprehensive coverage of segment video monitoring and the matching of camera preset positions with milestone numbers based on imaging principles.The maximum shooting distance of the camera is determined and set,and a direct conversion relationship between camera preset positions and milestone numbers is established.Secondly,a practical method and technological process for implementing a highway video monitoring system for precise positioning are proposed.Finally,a specific application validation is carried out on National Highway 204 Nantong Section.The results indicate that the accuracy of precise positioning queries of the preset position matching model reaches 87%.In terms of monitoring response time,it is more than five times higher in efficiency compared to manual monitoring,making it suitable for large-scale promotion and application in highway network video monitoring.
intelligent transportationhighway video monitoringspatiotemporal controlimaging principlesprecise positioning
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