Index Catalog // ScholarsArchive@OSU

Creator:: Oregon State University. Dept. of Computer Science, Chen, Guoning, Mischaikow, Konstantin Michael, Laramee, Robert S., and Zhang, Eugene
Abstract:: Existing topology-based vector field analysis techniques rely on the ability to extract the individual trajectories such as fixed points, periodic orbits and separatrices which are sensitive to noise and errors introduced by simulation and interpolation. This can make such vector field analysis unsuitable for rigorous interpretations. We advocate the use...
Resource Type:: Research Paper

Creator:: Oregon State University. Dept. of Computer Science, Esch, Gregory, Wonka, Peter, Muller, Pascal, and Zhang, Eugene
Abstract:: This paper addresses the problem of interactively modeling large street networks. We introduce a modeling framework that uses tensor fields to guide the generation of a street graph. A user can interactively edit a street graph by either modifying the underlying tensor field or by changing the graph directly. This...
Resource Type:: Research Paper

Creator:: Oregon State University. Department of Computer Science, Zhang, Eugene, Yeh, Harry Hsiu Jen, Lin, Zhongzang, and Laramee, Robert S.
Abstract:: The gradient of a velocity vector field is an asymmetric tensor field which can provide critical insight into the vector field that is difficult to infer from traditional trajectory-based vector field visualization techniques. We describe the structures in the eigenvalue and eigenvector fields of the gradient tensor and how these...
Resource Type:: Research Paper

Creator:: Oregon State University. Department of Computer Science, Zhang, Eugene, Yeh, Harry Hsiu Jen, Lin, Zhongzang, and Laramee, Robert S.
Abstract:: Most existing flow visualization techniques focus on the analysis and visualization of the vector field that describes the flow. In this paper, we employ a rather different approach by performing tensor field analysis and visualization on the gradient of the vector field, which can provide additional and complementary information to...
Resource Type:: Research Paper

Creator:: Oregon State University. Dept. of Computer Science, Chen, Guoning, Mischaikow, Konstantin Michael, Laramee, Robert S., and Zhang, Eugene
Abstract:: Vector field analysis plays a crucial role in many engineering applications, such as weather prediction, tsunami and hurricane study, and airplane and automotive design. Existing vector field analysis techniques focus on individual trajectories such as fixed points, periodic orbits and separatrices which are sensitive to noise and errors introduced by...
Resource Type:: Research Paper

Creator:: Oregon State University. Dept. of Computer Science, Neill, Patrick J., Metoyer, Ronald A., 1971-, and Zhang, Eugene
Abstract:: Fluid simulation on interacting deformable surfaces is a challenging problem that has many applications. In this paper, we present a framework in which artistic as well as physically realistic flows can be generated on surfaces during deformation and collision. Our simulation system provides comprehensive control over the motion and deformation...
Resource Type:: Research Paper

Creator:: Oregon State University. Department of Computer Science, Zhang, Eugene, Lin, Zhongzang, Yeh, Harry Hsiu-jen, and Laramee, Robert S.
Abstract:: Visualizing asymmetric tensors is an important task in understanding fluid dynamics. In this paper, we describe topological analysis and visualization techniques for asymmetric tensor fields on surfaces based on analyzing the impact of the symmetric and antisymmetric components of the tensor field on its eigenvalues and eigenvectors. At the core...
Resource Type:: Research Paper

Creator:: Zhang, Eugene, Hays, James H., Turk, Greg, and Oregon State University. Department of Computer Science
Abstract:: Designing tensor fields in the plane and on surfaces is a necessary task in many graphics applications, such as painterly rendering, pen-and-ink sketch of smooth surfaces, and anisotropic remeshing. In this paper, we present an interactive design system that allows a user to create a wide variety of surface tensor...
Resource Type:: Research Paper

Creator:: Chen, Guoning, Deng, Qingqing, Szymczak, Andrzej, Laramee, Robert, and Zhang, Eugene
Abstract:: Reliable analysis of vector elds is crucial for the rigorous interpretation of the ow data stemming from a wide range of engineering applications. Morse decomposition of a vector field has proven a useful topological representation that is more numerically stable than previous vector field skeletons. In this paper, we enhance...
Resource Type:: Research Paper

Creator:: Palke, Darrel, Chen, Guoning, Lin, Zhongzang, Yeh, Harry, Laramee, Robert, and Zhang, Eugene
Abstract:: Asymmetric tensor fields present new challenges for visualization techniques such as hyperstreamline placement and glyph packing. This is because the physical behaviors of the tensors are fundamentally different inside real domains where eigenvalues are real and complex domains where eigenvalues are complex. We present a hybrid visualization approach in which...
Resource Type:: Technical Report and Research Paper

ScholarsArchive@OSU