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Displaying 1-15 out of 15 total
Streak Lines as Tangent Curves of a Derived Vector Field
Found in: IEEE Transactions on Visualization and Computer Graphics
By Tino Weinkauf, Holger Theisel
Issue Date:November 2010
pp. 1225-1234
Characteristic curves of vector fields include stream, path, and streak lines. Stream and path lines can be obtained by a simple vector field integration of an autonomous ODE system, i.e., they can be described as tangent curves of a vector field. This fac...
 
Smoke Surfaces: An Interactive Flow Visualization Technique Inspired by Real-World Flow Experiments
Found in: IEEE Transactions on Visualization and Computer Graphics
By Wolfram von Funck, Tino Weinkauf, Holger Theisel, Hans-Peter Seidel
Issue Date:November 2008
pp. 1396-1403
Smoke rendering is a standard technique for flow visualization. Most approaches are based on a volumetric, par ticle based, or image based representation of the smoke. This paper introduces an alternative representation of smoke structures: as semi-transpa...
 
An Edge-Bundling Layout for Interactive Parallel Coordinates
Found in: 2014 IEEE Pacific Visualization Symposium (PacificVis)
By Gregorio Palmas,Myroslav Bachynskyi,Antti Oulasvirta,Hans Peter Seidel,Tino Weinkauf
Issue Date:March 2014
pp. 57-64
Parallel Coordinates is an often used visualization method for multidimensional data sets. Its main challenges for large data sets are visual clutter and over plotting which hamper the recognition of patterns in the data. We present an edge-bundling method...
 
Flow Visualization and Analysis Using Streak and Time Lines
Found in: Computing in Science & Engineering
By Tino Weinkauf,Holger Theisel
Issue Date:September 2012
pp. 78-84
Novel mathematical descriptions of streak and time lines lead to new methods for visualizing and analyzing flow fields. They enable faster computations and new feature-based methods.
 
A benchmark for evaluating FTLE computations
Found in: Visualization Symposium, IEEE Pacific
By Alexander Kuhn,Christian Rossl,Tino Weinkauf,Holger Theisel
Issue Date:March 2012
pp. 121-128
The Finite Time Lyapunov Exponent (FTLE) has become a widespread tool for analyzing unsteady flow behavior. For its computation, several numerical methods have been introduced, which provide trade-offs between performance and accuracy. In order to decide w...
 
Stable Feature Flow Fields
Found in: IEEE Transactions on Visualization and Computer Graphics
By Tino Weinkauf, Holger Theisel, Allen Van Gelder, Alex Pang
Issue Date:June 2011
pp. 770-780
Feature Flow Fields are a well-accepted approach for extracting and tracking features. In particular, they are often used to track critical points in time-dependent vector fields and to extract and track vortex core lines. The general idea is to extract th...
 
Visualizing Transport Structures of Time-Dependent Flow Fields
Found in: IEEE Computer Graphics and Applications
By Kuangyu Shi, Holger Theisel, Tino Weinkauf, Hans-Christian Hege, Hans-Peter Seidel
Issue Date:September 2008
pp. 24-36
This article focuses on the transport characteristics of physical properties in fluids—in particular, visualizing the finite-time transport structure of property advection. Applied to a well-chosen set of property fields, the proposed approach yields struc...
 
Vortex and Strain Skeletons in Eulerian and Lagrangian Frames
Found in: IEEE Transactions on Visualization and Computer Graphics
By Jan Sahner, Tino Weinkauf, Nathalie Teuber, Hans-Christian Hege
Issue Date:September 2007
pp. 980-990
We present an approach to analyze mixing in flow fields by extracting vortex and strain features as extremal structures of derived scalar quantities that satisfy a duality property: they indicate vortical as well as high-strain (saddletype) regions. Specif...
 
Extracting Higher Order Critical Points and Topological Simplification of 3D Vector Fields
Found in: Visualization Conference, IEEE
By Tino Weinkauf, Holger Theisel, Kuangyu Shi, Hans-Christian Hege, Hans-Peter Seidel
Issue Date:October 2005
pp. 71
This paper presents an approach to extracting and classifying higher order critical points of 3D vector fields. To do so, we place a closed convex surface s around the area of interest. Then we show that the complete 3D classification of a critical point i...
 
Extraction of Parallel Vector Surfaces in 3D Time-Dependent Fields and Application to Vortex Core Line Tracking
Found in: Visualization Conference, IEEE
By Holger Theisel, Jan Sahner, Tino Weinkauf, Hans-Christian Hege, Hans-Peter Seidel
Issue Date:October 2005
pp. 80
We introduce an approach to tracking vortex core lines in timedependent 3D flow fields which are defined by the parallel vectors approach. They build surface structures in the 4D space-time domain. To extract them, we introduce two 4D vector fields which a...
 
Topological Methods for 2D Time-Dependent Vector Fields Based on Stream Lines and Path Lines
Found in: IEEE Transactions on Visualization and Computer Graphics
By Holger Theisel, Tino Weinkauf, Hans-Christian Hege, Hans-Peter Seidel
Issue Date:July 2005
pp. 383-394
This paper describes approaches to topologically segmenting 2D time-dependent vector fields. For this class of vector fields, two important classes of lines exist: stream lines and path lines. Because of this, two segmentations are possible: either concern...
 
Stream Line and Path Line Oriented Topology for 2D Time-Dependent Vector Fields
Found in: Visualization Conference, IEEE
By Holger Theisel, Tino Weinkauf, Hans-Christian Hege, Hans-Peter Seidel
Issue Date:October 2004
pp. 321-328
Topological methods aim at the segmentation of a vector field into areas of different flow behavior. For 2D time-dependent vector fields, two such segmentations are possible: either concerning the behavior of stream lines, or of path lines. While stream li...
 
Saddle Connectors - An Approach to Visualizing the Topological Skeleton of Complex 3D Vector Fields
Found in: Visualization Conference, IEEE
By Holger Theisel, Tino Weinkauf, Hans-Christian Hege, Hans-Peter Seidel
Issue Date:October 2003
pp. 30
One of the reasons that topological methods have a limited popularity for the visualization of complex 3D flow fields is the fact that such topological structures contain a number of separating stream surfaces. Since these stream surfaces tend to hide each...
 
MovExp: A Versatile Visualization Tool for Human-Computer Interaction Studies with 3D Performance and Biomechanical Data
Found in: IEEE Transactions on Visualization and Computer Graphics
By Gregorio Palmas,Myroslav Bachynskyi,Antti Oulasvirta,Hans-Peter Seidel,Tino Weinkauf
Issue Date:February 2015
pp. 1
In Human-Computer Interaction (HCI), experts seek to evaluate and compare the performance and ergonomics of user interfaces. Recently, a novel cost-efficient method for estimating physical ergonomics and performance has been introduced to HCI. It is based ...
 
Biomechanical simulation in the analysis of aimed movements
Found in: CHI '13 Extended Abstracts on Human Factors in Computing Systems (CHI EA '13)
By Antti Oulasvirta, Gregorio Palmas, Myroslav Bachynskyi, Tino Weinkauf
Issue Date:April 2013
pp. 277-282
For efficient design of gestural user interfaces both performance and fatigue characteristics of movements must be understood. We are developing a novel method that allows for biomechanical analysis in conjunction with performance analysis. We capture moti...
     
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