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Abstract : |
Figure 1: Dense flow fields are first converted into a scalar field, and then displayed and analyzed by means of level-sets in this field. An oracle that is based on the discrete curvature of level-sets allows for the automatic separation and extraction of homogeneous streams. In this paper we propose a technique for visualizing steady flow. Using this technique, we first convert the vector field data into a scalar level-set representation. We then analyze the dynamic behavior and subsequent distortion of level-sets and interactively monitor the evolving structures by means of texture-based surface rendering. Next, we combine geometrical and topological considerations to derive a multiscale representation and to implement a method for the automatic placement of a sparse set of graphical primitives depicting homogeneous streams in the fields. Using the resulting algorithms, we have built a visualization system that enables us to effectively display the flow direction and its dynamics even for dense 3D fields., |
