University of Konstanz
Graduiertenkolleg / PhD Program
Computer and Information Science

Colloquium of the Department and the PhD Program

title

Visualization of Multivariate Point-based Volume Data

speaker

Prof. Dr. Lars Linsen, Jacobs University Bremen
Bremen, Germany

date & place

Wednesday, 26.05.2010, 16:15 h
Room C 252

abstract

Smoothed Particles Hydrodynamics Simulations are Lagrangian, meshfree schemes that have gained increasing popularity for modeling physical phenomena. Its main strength is it high adaptivity, which imposes a challenge to visualization, as it impedes interpolation over a structured grid. We present visualization methods that operate directly on the unstructured, point-based volume data. Our approach addresses individual magnitudes as well as the entire multivariate data field. For single scalar magnitudes, we present an approach to direct extraction of isosurfaces in point cloud surface representation, a level-set approach to obtain smooth segmenting surfaces, and point-based rendering of the extracted surfaces. For the entire multivariate data field, we present a multidimensional feature space clustering, interactive cluster exploration, and linked views to the imposed object-space segmentation using enclosing surfaces and direct volume rendering.