A Basic Study of a Role of Visualized Informations in a Design System

基于对可视化信息的有效利用将支持设计系统更有效的运行这一考虑，我们提出了几种技术和策略，使有用的信息能够有效和高效地显示给设计师。首先，我们考虑了从原始数据中提取特征的技术、可视化结果之间的比较、整个对象可视化的几种基于显示的技术以及可视化中数值误差的显示方法。其次，提出了一种从流场中提取涡元的方法和利用比较空间对可视化信息进行定量比较的方法，并将PEM （Pixel Exposure method）扩展到极限流线的可视化。此外，还讨论了体绘制法和粒子跟踪法中存在的可视化误差，分析了产生误差的原因和数值解的一致性。在此基础上，研究了将可视化信息转化为设计信息的策略。这些是科学数据的分层可视化，高度精确的可视化和可视化信息的简化。此外，我们还提出了一种利用网格计算实现大范围分布式数据可视化的策略。使用我们的方法和策略，可以更容易地选择更准确、更有效的可视化信息。这样，在设计的各个阶段都可以按需获得必要的可视化信息。此外，虽然目前可视化信息的有效利用很大程度上依赖于设计者，但我们提出的方法和策略可能会降低这种依赖。

Based on a consideration that the effective use of visualized information will support more efficient operation of a design system, we propose several techniques and strategies that profitable information will be able to be shown effectively and efficiently to the designers.First, we consider techniques of extracting the characteristic feature from raw data, comparison among visualized results, several display-based techniques for a whole object to be visualized and methods of displaying numerical errors in the visualization. Second, we develop a method of extracting vortex elements from flow fields and a quantitative comparison method for visualized information using the comparison space, and extend the PEM (Pixel Exposure Method) to visualization of limiting streamlines. In additions, visualization errors in the volume rendering method and in the particle tracking method are referred about a cause of the error and the consistency of numerical solution. And then, some strategies that visualized information is transferred into design information using the proposed methods are examined. Those are a hierarchical visualization for scientific data, a highly accurate visualization and a simplification of visualized information. Moreover, we propose a strategy of visualization of distributed data in a wide area using the Grid computing.It is expected that choice of higher accurate and more effective visualized information become easier using our methods and strategies. As a result, necessary visualized information can be obtained by on-demand request in each stage of the design. In additions, although effective utilization of visualized information strongly depends on the designer at present, the dependency may be decreased by our proposed methods and strategies.