Multilevel Presentation and Query Processing in Multimedia Database Systems

本计画的目标是开发一个多媒体资料库管理系统，以增强处理异质性单媒体查询与资料的能力。该系统的开发迎合了计算和存储的要求，同时适应和利用这种媒体中固有的不可避免的语义和代表性的不精确性。该系统的基本设计思想是基于多级数据模型和搜索机制。这些方法的目的是方便用户提出各种类型的查询。这些查询类型包括以下内容：（1）低级查询，例如在多媒体数据库中查找对象;（2）基于时空语义的中级查询，例如定位与多媒体数据相关联的事件;以及（3）基于组成单媒体数据、它们的时空维度和逻辑结构的高级查询，其目标是搜索预先组成的多媒体文档。多层次的搜索机制紧密相连。使用一组模糊参数对搜索结果中的不精确性进行建模。这项研究的结果将提供一个全面的框架，建立各种各样的多媒体应用在商业，教育，政府和军事部门。

The goal of this project is to develop a multimedia database management system with enhanced capabilities to handle heterogeneous monomedia queries and data. The development of this system caters to the computational and storage requirements while accommodating and exploiting the inevitable semantic and representational imprecisions inherent in such media. The underlying design philosophy of this system is based on multilevel data models and search mechanisms. These methodologies are designed to facilitate for the users the posing of various types of queries. These query types include the following: (1) low-level queries, such as finding objects in a multimedia database; (2) mid-level queries based on spatio-temporal semantics, such as locating events associated with multimedia data; and (3) high-level queries targeted towards searching pre-composed multimedia documents, based on constituent monomedia data, their spatio-temporal dimensions, and logical structure. The multi-level search mechanisms are tightly interlinked. Imprecision in the search results is modeled using a set of fuzzy parameters. The results of this research will provide a comprehensive framework for building wide variety of multimedia applications in commercial, educational, governmental and military sectors.