Multimedia Data Modeling Through a Semantic View Mechanism
Multimedia Data Modeling Through a Semantic View Mechanism
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DOI：
10.1007/s11280-008-0045-1
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发表时间：
2008-04
期刊：
影响因子：
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通讯作者：
Qing Li;Jianmin Zhao;Xinzhong Zhu
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文献类型：
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作者：
Qing Li;Jianmin Zhao;Xinzhong Zhu
多媒体数据的语义具有上下文相关性和媒体独立性，对于多媒体应用至关重要，但目前最先进的数据库技术对其支持还不够。在本文中，我们通过提出 MediaView 作为一种扩展的面向对象视图机制来解决这个问题，以弥合传统数据库和语义密集型多媒体应用程序之间的“语义鸿沟”。该机制使用名为媒体视图的建模构造来捕获多媒体的动态语义，该建模构造制定了自定义上下文，其中具有相似/相关语义的异构媒体对象通过附加属性和用户定义的语义关系来表征。然而，由于多媒体数据库的复杂成分和动态应用需求，用户很难以自上而下的方式自行定义单独的媒体视图。为此，设计了一种逻辑地构建媒体观点的独特方法。此外，定义并实现了一组用户级运算符以适应视图之间的专业化和泛化关系。 MediaView 的实用性和优雅性通过其在多模式信息检索系统中的应用得到了证明。
The semantics of multimedia data, which features context-dependency and media-independency, is of vital importance to multimedia applications but inadequately supported by the state-of-the-art database technology. In this paper, we address this problem by proposingMediaViewas an extended object-oriented view mechanism to bridge the “semantic gap” between conventional databases and semantics-intensive multimedia applications. This mechanism captures the dynamic semantics of multimedia using a modelling construct namedmedia view, which formulates a customized context whereheterogeneousmedia objects with similar/related semantics are characterized byadditional propertiesand user-definedsemantic relationships. Due to the complex ingredients and dynamic application requirements of multimedia databases, it is however difficult for users to define by themselves individualmedia viewsin a top–down fashion. To this end, a unique approach of constructing media views logically is devised. In addition, a set of user level operators is defined and implemented to accommodate the specialization and generalization relationships among the views. The usefulness and elegancy ofMediaVieware demonstrated by its application in a multi-modal information retrieval system.