Information

Abstract

Oriented Line Integral Convolution (OLIC) illustrates flow fields by convolving a sparse texture with an anisotropic convolution kernel. The kernel is aligned to the underlying flow of the vector field. OLIC does not only show the direction of the flow but also its orientation. This paper presents Fast Rendering of Oriented Line Integral Convolution (FROLIC), which is approximately two orders of magnitude faster than OLIC. Costly convolution operations as done in OLIC are replaced in FROLIC by approximating a streamlet through a set of disks with varying intensity. The issue of overlapping streamlets is discussed. Two efficient animation techniques for animating FROLIC images are described. FROLIC has been implemented as a Java applet. This allows researchers from various disciplines (typically with inhomogenous hardware environments) to conveniently explore and investigate analytically defined 2D vector fields.

Additional Files and Images

Additional files:
paper
paper




BibTeX

Download BibTeX-Entry
@techreport{Wegenkittl-97-FOL,
  title =      "Fast Oriented Line Integral Convolution for Vector
                Field Visualization via the Internet",
  author =     "Rainer Wegenkittl and Meister Eduard Gr{\"o}ller",
  year =       "1997",
  abstract =   "Oriented Line Integral Convolution (OLIC) illustrates flow
               fields by convolving a sparse texture with an anisotropic
               convolution kernel. The kernel is aligned to the underlying
               flow of the vector field. OLIC does not only show the
               direction of the flow but also its orientation. This paper
               presents Fast Rendering of Oriented Line Integral
               Convolution (FROLIC), which is approximately two orders of
               magnitude faster than OLIC. Costly convolution operations as
               done in OLIC are replaced in FROLIC by approximating a
               streamlet through a set of disks with varying intensity. The
               issue of overlapping streamlets is discussed. Two efficient
               animation techniques for animating FROLIC images are
               described. FROLIC has been implemented as a Java applet.
               This allows researchers from various disciplines (typically
               with inhomogenous hardware environments) to conveniently
               explore and investigate analytically defined 2D vector
               fields.",
  address =    "Favoritenstrasse 9-11/186, A-1040 Vienna, Austria",
  institution = "Institute of Computer Graphics and Algorithms, Vienna
               University of Technology",
  note =       "human contact: technical-report@cg.tuwien.ac.at",
  month =      mar,
  number =     "TR-186-2-97-07",
  keywords =   "vector field visualization, Line Integral Convolution",
  URL =        "http://www.cg.tuwien.ac.at/research/publications/1997/Wegenkittl-97-FOL/",
}