Smooth CCTV (Closed Circuit Television System) ship video tracking method
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A smooth tracking, ship technology, applied in TV, color TV, CCTV systems, etc., can solve the problem of missing monitoring pictures, not monitoring selected ships, etc.
Inactive Publication Date: 2016-03-23
THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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When the interval period is large and the tracked ship is relatively close and fast, CCTV may not even be able to monitor the selected ship for a period of time, and may miss the monitoring screen that needs to be captured for evidence
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[0052] Specifically, as figure 1 所示,本实施例包括如下步骤:
[0053] Step 1: Obtain the basic information and installation information of the CCTV camera;
[0054] Step 1-1: Obtain the camera's longitude, latitude, and camera's altitude;
[0055] Step 1-2: Obtain the angle Δα between the initial zero position of the camera and true north;
[0056] Step 1-3: Obtain the initial zero of the camera as the angle Δβ relative to the normal;
[0057] Step 2: Obtain the tracked ship's course γ, speed v, ship length l, ship height h, and ship's current latitude and longitude in real time;
[0058] Step 3: Calculate the horizontal / vertical parameters that the pan / tilt should set according to the current latitude and longitude of the ship, the longitude, latitude, and altitude of the camera, and the horizontal / vertical angle between the pan / tilt and the initial zero position. The altitude of the camera is H, and the angle between the camera and the normal direction of the water surface is β. And m...
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Abstract
The invention discloses a smooth CCTV ship video tracking method. Information including the latitude and longitude, the course, the speed, the length and the height of a monitored ship is obtained, the horizontal deflection angle, the vertical deflection angle and the focal length of a camera holder are calculated via the installation latitude and longitude, the height to the water surface and the zero azimuth of a CCTV camera, and the holder is rotated at a proper speed along the projection direction of the ship course. The position of the camera relative to the monitored ship is detected when AIS or radar data arrives, the holder is decelerated or stopped when the camera is ahead of the ship, and the holder is accelerated when the camera is behind the ship. The continuous rotation scheme enables the holder to rotate continuously in the same direction in the monitoring process, jittering of monitoring frames is reduced, and a close rapid target is prevented from loss. The CCTV monitoring camera can thus track the ship, the proportion of the ship in the monitoring frames is kept the same, and the smooth jittering of tracking frames is lower.
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technical field [0001] 本发明属于船舶视频监控技术领域,涉及船舶交通管理系统(VesselTrafficService,VTS)或电子巡航系统等在实施船舶监视任务中应用的一种使用CCTV(ClosedCircuitTelevisionSystem)对船舶进行平滑跟踪的技术。 Background technique [0002] 随着水运事业的发展,船舶交通量不断增加。为了保障船舶交通安全,提高交通效率,保护水域环境,许多国家逐渐在各个港口、海峡、江河建立起了对船舶实施交通管理并提供咨询服务的船舶交通管理系统(VTS)。VTS利用AIS基站、雷达、CCTV、VHF以及舰载终端等通信设备监控航行的在港船只和进出港口船只,其中CCTV系统能够通过摄像机视频摄录直观的获得现场的监控画面,直接观察现场船舶航行状态、船舶类型、航行现场环境等信息,并且能够进行违章船只、事故现场的抓拍取证。 [0003] 2015年6月1日,豪华游轮“东方之星”在从南京驶往重庆途中突遇龙卷风,随后在长江中游水域沉没。整个翻沉过程并没有被相关部门观测到,而是在沉没后40分钟才从幸存者口中得知这艘巨轮早已被大海吞噬。这种需要重点监控的船舶,应对其进行全程监控确保这类船舶的航行安全。尤其当船舶驶入危险水域或以超低速航行时,更应该进行重点跟踪监控,因此使用CCTV对船舶进行跟踪监控与抓拍取证非常有必要。文献《AIS,CCTV,VTS整合及功能拓展》(龚瑞卿,中国水运,第10期,2005年,p42-43)提出了利用VTS船舶信息来调整CCTV对船舶跟踪的设想,其思路是控制CCTV在每次AIS或雷达数据到来时进行一次定位,然后摄像头停止转动,等待下一个数据周期的到来。这种跟踪方法理论上能实现船舶跟踪,但由于实际运用中目标实时信息有一定的时间间隔,监控画面会出现周期性的抖动。当间隔周期较大,被跟踪船舶距离较近且速度较快时,CCTV甚至可能在一段时间内监控不到选定船舶,并且可能错过需要抓拍取证的监控画面。 Contents of the invention [0004] 本发明的目的是:提供一种控制CCTV(ClosedCircuitTelevisionSystem闭路电视系统)对船舶视频进行平滑跟踪的方法,通过AIS(AutomaticIdentif...
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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/18H04N5/232
CPCH04N7/181H04N23/66H04N23/667
Inventor 钟原晏谢飞李志国曹德胜齐忠怀杨建涛蒋怡亮
Owner THE 28TH RES INST OF CHINA ELECTRONICS TECH GROUP CORP
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