An Object-Oriented Approach to Visual Database

نویسندگان

  • Taehyung Wang
  • Phillip C.-Y. Sheu
چکیده

Introduction V isualization can be applied to almost all computer-based applications such as medical education, scientific data, virtual reality, simulation, and so forth. Research in visual databases addresses the problem of retrieving, updating, and displaying a 3-D static or dynamic world which consists of a large number of objects stored in a centralized or distributed database. In addition, it is desirable that a visual database can allow the user to access a large, dynamic visual world interactively with intelligent queries over the Internet. In traditional computer graphics, the major concern is to display a scene accurately without the consideration of secondary storage ; and the existing spatial database systems have not considered the visual and dynamic aspects of graphical objects. Because of the rising demands for visualizing a large number of objects, a visual database needs to consider the following requirements: (1) a world consists of a large number of objects, and thus objects have to be stored in one or several databases; (2) both the camera and the objects are allowed to move; and (3) rapid search based on visual properties, such as shape, of an object is necessary to effectively locate the object. Object-Oriented Algorithms for Computer Graphics While conventional approaches in computer graphics, such as the binary space partition (BSP) tree algorithm [1–2] and its extensions [3–6], deal with each polygon of an object, an object-oriented ap

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تاریخ انتشار 1997