The invention discloses an AIS ship track extrapolation method for a video monitoring system. The method comprises the following steps: S1, acquiring AIS information of a ship at a current moment andat least two last moments, and obtaining the track point positions of the current moment and at least two last moments and the corresponding moments; S2, obtaining a radial distance value and an anglevalue of the track point position relative to the reference point through the known reference point position and the track point position; S3, calculating a radial speed value and an angular speed value between two continuous moments; S4, calculating radial acceleration values and angular acceleration values at two moments; and S5, calculating an extrapolated track point position according to a track extrapolation formula through the speed value and the acceleration value. Factors such as the position, the time, the navigational speed and the steering of the ship are combined; meanwhile, therelation between the monitoring camera and the ship is fused for track extrapolation, and the accuracy of AIS ship track extrapolation is improved.
本发明公开了一种用于视频监控系统的AIS船舶航迹外推方法,包括如下步骤:S1:获取船舶的当前时刻和至少上两个时刻的AIS信息,得到当前时刻和至少上两个时刻的航迹点位置和对应的时刻;S2:通过已知的参照点位置和航迹点位置,得到航迹点位置相对参照点的径向距离值和角度值;S3:计算连续两个时刻间的径向速度值和角向速度值;S4:计算两个时刻的径向加速度值和角向加速度值;S5:通过速度值和加速度值根据航迹外推公式计算得到外推的航迹点位置。本发明结合船舶本身的位置、时间、航速、转向等因素,同时融入监控摄像机与船舶之间的关系进行航迹外推,提高AIS船舶航迹外推的准确性。
AIS ship track extrapolation method for video monitoring system
用于视频监控系统的AIS船舶航迹外推方法
2020-09-29
Patent
Electronic Resource
Chinese
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