【摘要】 针对当前GIS中视频数据管理的功能较单一、检索方法单调的现状,通过分析、整合空间数据、视频数据,设计了一个地理立体视频数据模型(GeoSVDM),它包括视频、空间几何、专题属性、语义标注以及线性参照等要素,基于面向对象方法,抽象了视频帧及其位置、视域、视频片段及其轨迹等组件对象及其逻辑关系,并应用UML定义了模型结构。该模型通过建立视频对象与地理实体间的空间位置参照及语义参照关系,支持可视化、检索以及量测等多个应用功能,实现了地理立体视频对象数据组织与检索表达。试验表明,GeoSVDM具有功能丰富、集成化以及松耦合、灵活可扩展等优点,适合于地理立体视频的管理,并为GIS中应用可定位媒体提供了基础数据模型。更多还原

【Abstract】 With the rapid advance of the multimedia and position technology,the new-style geo-tagged media,such as geographic video,panoramic picture and measurable image,have been introduced in GIS applications.This paper aims to introduce the stereo video to geographic information science.Geographic stereo video includes both spatial and temporal geographic characteristics acquired through ground-based or non-ground-based cameras.It is the stereo video that extends the elements of interior and exterior orientation for video frame.And it supports the video retrieval and image measurement based on the spatial information.It has been a new way for geographic representation.Regarding to the disadvantage of the existing methods for video management in GIS such as single function and monotone querying methods,a geographic stereo video data model(GeoSVDM)is proposed on the basis of analysis and integration of the spatial and video data.The model was composed of entities of video,geometry,theme,semantic annotation and linear reference.The video frame and its location or field of view,the video segment and its trajectories are Abstracted based on the object oriented method.And the conceptual framework is described through UML(Unified Modeling Language).The model established the location references and semantic references between the video object and the geographic entities.It supports the multiple application function,such as visualization,retrievement and measurement with image.The GeoSVDM fulfilled the data organization and querying methods of geographic stereo video objects.The experiment indicate that the GeoSVDM is a multiple function,integration,loosely coupled,flexible and extensible data model for the management of geographic stereo video.This model plays an important role in geo-tagged media application by providing a fundamental data model for GIS.更多还原