Pathline glyphs
Pathline glyphs
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DOI：
10.1111/cgf.12335
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发表时间：
2014-05
影响因子：
2.5
通讯作者：
Marcel Hlawatsch;F. Sadlo;H. Jang;D. Weiskopf
中科院分区：
文献类型：
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作者：
Marcel Hlawatsch;F. Sadlo;H. Jang;D. Weiskopf
路径的可视化是一种常见的方法，与非定常流场的分析密切相关。然而，路径可能相交，导致视觉混乱和感知问题。与完善的流线放置技术相比，这使得通过多条路径的安排来提供整个领域的富有表现力的可视化从本质上来说很困难。我们提出了一种减少这些问题的方法。它受到基于字形的可视化和小倍数的启发：我们将域划分为单元格，每个单元格对应于整个域的缩小版本。在这些细胞内，绘制了一条缩小的路径。在总体尺度上，我们的路径符号导致了紧急的视觉模式，提供了对时间依赖性流行为的洞察。放大允许我们详细分析单个路径并比较相邻的路径。整体的方法是补充与上下文保存变焦镜头和交互式路径为基础的探索。虽然我们主要针对2D流的可视化，但我们也解决了扩展到3D的问题。我们的评估包括几个例子，与其他流可视化技术的比较，以及与领域专家的用户研究。
Visualization of pathlines is common and highly relevant for the analysis of unsteady flow. However, pathlines can intersect, leading to visual clutter and perceptual issues. This makes it intrinsically difficult to provide expressive visualizations of the entire domain by an arrangement of multiple pathlines, in contrast to well‐established streamline placement techniques. We present an approach to reduce these problems. It is inspired by glyph‐based visualization and small multiples: we partition the domain into cells, each corresponding to a downscaled version of the entire domain. Inside these cells, a single downscaled pathline is drawn. On the overview scale, our pathline glyphs lead to emergent visual patterns that provide insight into time‐dependent flow behavior. Zooming‐in allows us to analyze individual pathlines in detail and compare neighboring lines. The overall approach is complemented with a context‐preserving zoom lens and interactive pathline‐based exploration. While we primarily target the visualization of 2D flow, we also address the extension to 3D. Our evaluation includes several examples, comparison to other flow visualization techniques, and a user study with domain experts.