Dye Advection Without the Blur: A Level-Set Approach for Texture-Based Visualization of Unsteady Flow
| dc.contributor.author | Weiskopf, D. | en_US |
| dc.date.accessioned | 2015-02-19T09:54:15Z | |
| dc.date.available | 2015-02-19T09:54:15Z | |
| dc.date.issued | 2004 | en_US |
| dc.description.abstract | Dye advection is an intuitive and versatile technique to visualize both steady and unsteady flow. Dye can be easily combined with noise-based dense vector field representations and is an important element in user-centric visual exploration processes. However, fast texture-based implementations of dye advection rely on linear interpolation operations that lead to severe diffusion artifacts. In this paper, a novel approach for dye advection is proposed to avoid this blurring and to achieve long and clearly defined streaklines or extended streak-like patterns. The interface between dye and background is modeled as a level-set within a signed distance field. The level-set evolution is governed by the underlying flow field and is computed by a semi-Lagrangian method. A reinitialization technique is used to counteract the distortions introduced by the level-set evolution and to maintain a level-set function that represents a local distance field. This approach works for 2D and 3D flow fields alike. It is demonstrated how the texture-based level-set representation lends itself to an efficient GPU implementation and therefore facilitates interactive visualization.Categories and Subject Descriptors (according to ACM CCS): I.3.3 [Computer Graphics]: Picture/Image Generation I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism | en_US |
| dc.description.number | 3 | en_US |
| dc.description.seriesinformation | Computer Graphics Forum | en_US |
| dc.description.volume | 23 | en_US |
| dc.identifier.doi | 10.1111/j.1467-8659.2004.00779.x | en_US |
| dc.identifier.issn | 1467-8659 | en_US |
| dc.identifier.pages | 479-488 | en_US |
| dc.identifier.uri | https://doi.org/10.1111/j.1467-8659.2004.00779.x | en_US |
| dc.publisher | The Eurographics Association and Blackwell Publishing, Inc | en_US |
| dc.title | Dye Advection Without the Blur: A Level-Set Approach for Texture-Based Visualization of Unsteady Flow | en_US |