Browsing by Subject "video databases"

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    Data modeling and querying for video databases
    (2002) Dönderler, Mehmet Emin
    With the advances in information technology, the amount of multimedia data captured, produced and stored is increasing rapidly. As a consequence, multimedia content is widely used for many applications in today’s world, and hence, a need for organizing this data and accessing it from repositories with vast amount of information has been a driving stimulus both commercially and academically. In compliance with this inevitable trend, first image and especially later video database management systems have attracted a great deal of attention since traditional database systems are not suitable to be used for multimedia data. In this thesis, a novel architecture for a video database system is proposed. The architecture is original in that it provides full support for spatio-temporal queries that contain any combination of spatial, temporal, object-appearance, external-predicate, trajectory-projection and similarity-based object-trajectory conditions by a rule-based system built on a knowledge-base, while utilizing an object-relational database to respond to semantic (keyword, event/activity and category-based) and low-level (color, shape and texture) video queries. Research results obtained from this thesis work have been realized by a prototype video database management system, which we call BilVideo. Its tools, Fact-Extractor and Video-Annotator, its Web-based visual query interface and its SQL-like textual query language are presented. Moreover, the query processor of BilVideo and our spatio-temporal query processing strategy are also discussed.
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    ItemOpen Access
    Semantic query execution in a video database system
    (2004) Alper, Cemil
    In this thesis, we have extended a video database management system, called BilVideo, with semantic querying capability. Our work is based on a video data model for the extraction and storage of the semantic contents of videos, and a query language to support semantic queries on video data. The Web based query interface of BilVideo has also been modified to handle semantic queries both visually and textually.