【作者】 王莹；

【导师】 杨梅；

【作者基本信息】 大连海事大学 ， 信息与通信工程， 2010， 硕士

【摘要】 VTS (Vessel Traffic Services)主要负责监管船舶的航行安全以及水域环境安全。以往的VTS系统中,主要依靠雷达获取目标的位置及动态信息。目前,我国各地的主要航道及重点水域已经建成CCTV (Closed Circuit Television)监控网,CCTV视频监控子系统已经成为VTS系统获取目标信息的重要途径,发挥越来越大的作用。与雷达子系统相比,现有的CCTV监控子系统仅完成现场的实时监控与记录,无法从大量的平面图像中选取有用信息来对交通形势进行有效的判断与评估。技术相对成熟的雷达子系统由于受环境和水域条件影响,威力和性能常常难以发挥,导致雷达的投资效益比极低。因此,迫切需要一种改进的目标定位技术,在特定环境下弥补雷达不足。本文的研究来源于宜昌海事局的“宜昌船舶交通管理系统工程枝城大桥站项目”,主要负责其中的CCTV监控技术改进方法的研究。文中提出一种基于CCTV子系统的双目立体定位理论,定位方法的确定受机器人视觉启发,以基于角度的测量方法为依据。首先,建立定位模型；其次,确定摄像机外参数矩阵；最终,将定位结果表示为统一的世界坐标。根据误差传递函数对定位误差进行了理论分析,分析结果显示在较好的图像处理技术支持下,CCTV目标定位技术对近距离目标的定位效果较好。为了能够使CCTV目标定位技术不断的向实际应用环境发展,本文结合VisualC++开发平台,设计了一个基于简单背景的简单目标定位实验系统。实验系统方案设计中,以小型水域为背景分析如何选择所需设备,仅在实现过程中将其简化。系统构成采用模块化结构,结构层次清晰。主要分为视频采集与处理模块(包括双目系统的目标识别与立体匹配等环节)、数码云台智能控制模块、实时定位模块、终端显示模块(显示目标图像信息与定位结果)。各模块之间相对独立工作、数据共享,实现联动控制。更多还原

【Abstract】 Maritime traffic as an important transportation is supervised by the branch of maritime management with Vessel Traffic Services (VTS). At present, marine bureaus’ VTS system in many provinces has been configured closed circuit television subsystem. As an important supervising manner, CCTV system can prolong the time of supervision; it also can widen the range of supervision.Compared with radar subsystem, the existing CCTV video surveillance subsystem could only achieve the real-time supervising and recording of the locale. It couldn’t select useful information from a lot of plane figures to judge and estimate the traffic situation effectively. Radar subsystem as a relatively mature technology, its power and performance is hardly to be exerted, due to the effect of environment and water conditions. So, we needs a kind of modified target location technology urgently, in order to compensate the weakness of radar in some specifically conditions.This thesis, coming from "the branch project of Zhicheng bridge station of Yichang vessel traffic management system" for Yichang maritime authorities, is mainly researching on the improvement of the CCTV supervising technology in the project. This article advances a theory of binocular stereoscopic location based on CCTV subsystem. This kind of location method is enlightened by robot vision, according to the measurement based on angle measuring. First, establishes the model of location; second, obtains the extrinsic parameter matrix of camera; finally, the locating result is shown as a uniform coordinate. On the basis of error transfer function, this article analyses the source of error and its effects. Analytic result shows that CCTV targets location technology should brings better effect of close-in target location, if it is supported by a better image processing technology.In order to make CCTV target location technology develop to actual application environment, this article combines Visual C++ development platform, has designed an experimental system for simple target in simple condition. In the process of project design, this article analysis how to choose the equipment on the background of maritime traffic environment. It is simplified just when it carried out.System structure using module as basic units; hierarchy is very clearly. System structure is mainly divided into Video capture and process module(includes target identifying and stereoscopic matching of binocular system, digital PTZ intelligent control module, real time location module, terminal display module(shows the image of target and the result of location). Every module works independently, shares data continuously, and achieves linkage controlling.更多还原