Journal
IEEE TRANSACTIONS ON VISUALIZATION AND COMPUTER GRAPHICS
Volume 12, Issue 1, Pages 14-25Publisher
IEEE COMPUTER SOC
DOI: 10.1109/TVCG.2006.16
Keywords
contour tree; level set topology; feature tracking; time varying volume visualization
Categories
Funding
- NCRR NIH HHS [P20 RR020647, P20 RR020647-01] Funding Source: Medline
- NIBIB NIH HHS [R01 EB004873-01A2, R01 EB004873] Funding Source: Medline
- NIGMS NIH HHS [R01 GM073087-03, R01 GM073087, R01 GM074258, R01 GM074258-03] Funding Source: Medline
- NATIONAL CENTER FOR RESEARCH RESOURCES [P20RR020647] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF BIOMEDICAL IMAGING AND BIOENGINEERING [R01EB004873] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [R01GM073087, R01GM074258] Funding Source: NIH RePORTER
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The contour tree has been used to compute the topology of isosurfaces, generate a minimal seed set for accelerated isosurface extraction, and provide a user interface to segment individual contour components in a scalar field. In this paper, we extend the benefits of the contour tree to time-varying data visualization. We define temporal correspondence of contour components and describe an algorithm to compute the correspondence information in time-dependent contour trees. A graph representing the topology changes of time-varying isosurfaces is constructed in real-time for any selected isovalue using the precomputed correspondence information. Quantitative properties, such as surface area and volume of contour components, are computed and labeled on the graph. This topology change graph helps users to detect significant topological and geometric changes in time-varying isosurfaces. The graph is also used as an interactive user interface to segment, track, and visualize the evolution of any selected contour components over time.
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