@InProceedings{sahner05a,
  author    = {J.~Sahner and T.~Weinkauf and H.-C.~Hege},
  title     = {Galilean Invariant Extraction and Iconic Representation of Vortex Core Lines},
  booktitle = {Proc. Eurographics / IEEE VGTC Symposium on Visualization (EuroVis '05)},
  year      = {2005},
  editor    = {K.~Brodlie, D.~Duke, K.~Joy},
  pages     = {151--160},
  address   = {Leeds, UK},
  month     = {June},
  abstract  = {While vortex region quantities are Galilean invariant, most methods
              for extracting vortex cores depend on the frame of reference. We
              present an approach to extracting vortex core lines independently
              of the frame of reference by extracting ridge and valley lines of
              Galilean invariant vortex region quantities. We discuss a generalization
              of this concept leading to higher dimensional features. For the visualization
              of extracted line features we use an iconic representation indicating
              their scale and extent. We apply our approach to datasets from numerical
              simulations and experimental measurements.},
  day       = {1 - 3},
  keywords  = {3D flow visualization, feature extraction, vortex core lines, vortex quantities},
  url = {http://tinoweinkauf.net/publications/abssahner05a.html},
}