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Computer Animation 1997   p. 15
Animating Flow Fields: Rendering of Oriented Line Integral Convolution
Rainer Wegenkittl, Vienna University of Technology
E. Groller, Vienna University of Technology
Werner Purgathofer, Vienna University of Technology

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DOI Bookmark: http://doi.ieeecomputersociety.org/10.1109/CA.1997.601035
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Abstract
Line Integral Convolution (LIC) is a common approach for the visualization of 2D vector fields. It is well suited for visualizing the direction of a flow field, but it gives no information about the orientation of the underlying vectors. We introduce Oriented Line Integral Convolution (OLIC), where direction as well as orientation are encoded within the resulting image. This is achieved by using a sparse input texture and a ramp like (anisotropic) convolution kernel. This method can be used for animations, whereby the computation of so called pixel traces fastens the calculation process. In the result section various OLICs illustrating simple and real-world vector fields are shown.
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Citation:  Rainer Wegenkittl, E. Groller, Werner Purgathofer, "Animating Flow Fields: Rendering of Oriented Line Integral Convolution," ca, p. 15,  Computer Animation 1997,  1997