Subdomain Aware Contour Trees and Contour Evolution in Time-Dependent Scalar Fields

For time-dependent scalar fields, one is often interested in topology changes of contours in time. In this paper, we focus on describing how contours split and merge over a certain time interval. Rather than attempting to describe all individual contour splitting and merging events, we focus on the simpler and therefore more tractable in practice problem: describing and querying the cumulative effect of the splitting and merging events over a user-specified time interval. Using our system one can, for example, find all contours at time t0 that continue to two contours at time t1 without hitting the boundary of the domain. For any such contour, there has to be a bifurcation happening to it somewhere between the two times, but, in addition to that, many other events may possibly happen without changing the cumulative outcome (e.g. merging with several contours born after t0 or splitting off several contours that disappear before t1). Our approach is flexible enough to enable other t...

• Type: Conference
• Year: 2005
• Where: SMI
• Authors: Andrzej Szymczak
• Keywords: Certain Time Interval, SMI 2005, Time Interval, User-specified Time Interval