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Transfer function design based on user selected samples for intuitive multivariate volume exploration

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2 Author(s)
Liang Zhou ; SCI Inst., Univ. of Utah, Salt Lake City, UT, USA ; Hansen, C.

Multivariate volumetric datasets are important to both science and medicine. We propose a transfer function (TF) design approach based on user selected samples in the spatial domain to make multivariate volumetric data visualization more accessible for domain users. Specifically, the user starts the visualization by probing features of interest on slices and the data values are instantly queried by user selection. The queried sample values are then used to automatically and robustly generate high dimensional transfer functions (HDTFs) via kernel density estimation (KDE). Alternatively, 2D Gaussian TFs can be automatically generated in the dimensionality reduced space using these samples. With the extracted features rendered in the volume rendering view, the user can further refine these features using segmentation brushes. Interactivity is achieved in our system and different views are tightly linked. Use cases show that our system has been successfully applied for simulation and complicated seismic data sets.

Published in:

Visualization Symposium (PacificVis), 2013 IEEE Pacific

Date of Conference:

Feb. 27 2013-March 1 2013

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