基于定位视频的车辆导航原型系统设计与关键技术研究  

Research on Design and Key Technologies of Vehicle Navigation System Based on Geo-video

作　　者：刘岳峰[1] 张杰[1] 孙华波[1] 

机构地区：[1]北京大学遥感与地理信息系统研究所,北京100871

出　　处：《地理与地理信息科学》2007年第5期31-34,共4页Geography and Geo-Information Science

基　　金：北京市重点实验室基金项目"空间信息集成与3S工程应用"(SYS10001402)

摘　　要：基于电子地图的导航系统相对抽象且缺乏沉浸感,不方便用户判别。为使导航效果更加直观和生动,该文提出基于定位视频的车辆导航思路,对车辆导航原型系统进行总体设计与实现,并探讨其关键技术。核心思想是建立道路定位视频(Geo-video)数据库,利用移动终端和固定目标的位置信息对定位视频数据库进行空间检索,将相应位置的视频图像传输给移动终端并实现路线和目标指引。试验证明该方法在技术上具有可行性。In order to make the effect of the navigation system based on the digital map more direct-viewing and vivid,and also to enable users more convenient and easier to distinguish objects, this paper proposes a thought of vehicle navigation system based on Geo-video. Its core idea is establishing path Geo-video database, then making a spatial retrieval to the Geo-video database by the location information of the mobile terminals and geographic objects, and transmitting the corresponding video data to the mobile terminals to realize the goal of route and destination indication, which really makes navigation more effective. The paper gives a general design of vehicle navigation system based on Geo--video, and discusses the key technologies. The relevant key technologies can be illustrated as follows： 1） building the Geo-video database; 2） retrieving the video frame with the GPS information 3） recognizing the target geographic objects relative location in the video frame images. A prototype of Geo- video based navigation system is developed under Microsoft Visual C#. NET platform. This paper focuses on analyzing Geo-video＇s basic principles and key technologies, so it has a long way to apply them into real products because of following reasonsz 1） It is too expensive to build the Geo--video database. 2） Mobile terminals limited resource and low transmitting speed of current wireless network make it difficult to apply the basic principles into real products. So the related research can be continued as follows： 1） improving the methods of capturing Geo-video data 2） making a thorough use of the road monitoring video data 3） improving the compression transmitting and storage technologies of video data transmitted through the wireless network 4） methods of applying the Geo-video technologies into the digital map based on navigation system.

关 键 词：定位视频 视频数据库 视频导航系统 车辆导航 

分 类 号：P208[天文地球—地图制图学与地理信息工程]