SYSTEM FOR AUTOMATICALLY SETTING UP DETECTION AREA OF CCTV

摘要

PURPOSE: A detection area set-up system of a CCTV(Closed Circuit Television) is provided to enhance the accuracy of traffic information by automatically collecting traffic information using the panning, tilting, and zooming functions of a CCTV. CONSTITUTION: A detection area set-up system(100) of a CCTV comprises a CCTV camera(110), a video input unit(120), an element value calculating unit(130), a communication unit(140), a coordinate converting unit(150), a correcting unit(160), and a preset unit(170). The CCTV camera is installed on a road to photograph the road. The video input unit compresses the images inputted via the CCTV and transfers the compressed image to a traffic center. The element value calculating unit consists of an A/D(Analog to Digital) converter, a CPU(Central Processing Unit), a pan/tilt driver, a zoom driver, a communication driver, and a power driver. The element value calculating unit calculates the panning value, tilting value, and zooming value of the CCTV camera when panning, tilting, and zooming are performed. The communication unit transfers the element values and images to the traffic center by multiplexing a video link and a data link. The coordinate converting unit calculates a coordinate conversion on a three-dimensional space by a coordinate converting algorithm. The correcting unit installed in the traffic center automatically sets up a detection area by considering a mechanical error and corrects the detection area. Therefore, accurate traffic condition is obtained.