[Forschungsseminar-BSV] Forschungsseminar Computergrafik, Bildverarbeitung und Visualisierung

[Patrick Oesterling]

E I N L A D U N G

zum Forschungsseminar Computergrafik, Bildverarbeitung und 
Visualisierung am Mittwoch, den 05. Juni 2013, 13:15 Uhr, Raum P-701 im 
Paulinum am Augustusplatz.


Wir hören drei Kurzvorträge, gehalten als Probevorträge für die Eurovis 
2013, von:


Sebastian Volke
Universität Leipzig
(Dauer: ca. 20 Minuten)

mit dem Titel

"dPSO-Vis: Topology-based Visualization of Discrete PSO"


zum Inhalt:

Particle swarm optimization (PSO) is a metaheuristic that has been 
applied successfully to many continuous and combinatorial optimization 
problems, e.g., in the fields of economics, engineering, and natural 
sciences. In PSO, a swarm of particles moves within a search space in 
order to find an optimal solution. Unfortunately, it is hard to 
understand in detail why and how changes in the design of PSO algorithms 
affect the optimization behavior. Visualizing the particle states could 
provide substantially better insight into PSO algorithms. Though in case 
of combinatorial optimization problems, it often raises the problem of 
illustrating the states within the discrete search space that cannot be 
embedded spatially. We propose a visualization approach to depict the 
optimization problem topologically using a landscape metaphor. This 
visualization is augmented by an illustration of the time-dependent 
states of the particles. Thus, the user of dPSO-Vis is able to analyze 
the swarm's behavior within the search space. In principle, our method 
can be used for any optimization algorithm where a swarm of individuals 
searches within a discrete search space. Our approach is verified with a 
case study for the PSO algorithm HelixPSO that predicts the secondary 
structure of RNA molecules.

und:

Steven Schlegel
Universität Leipzig
(Dauer: ca. 15 Minuten)

mit dem Titel

"Determining and Visualizing Potential Sources of Floods"


zum Inhalt:

In this paper, we visually analyze spatio-temporal patterns of different 
hydrologic parameters relevant for flooding. On the basis of data from 
climate simulations with a high resolution regional atmosphere model, 
several extreme events are selected for different river catchments in 
Germany. By visually comparing the spatial distribution of the main 
contributions to the run-off along with their temporal evolution for a 
time period in the 20th and the 21th century, impacts of climate change 
on the hydrological cycle can be identified.

und:

Sebastian Eichelbaum
Universität Leipzig
(Dauer: ca. 15 Minuten)

mit dem Titel

"PointAO - Improved Ambient Occlusion for Point-based Visualization"


zum Inhalt:

The visualization of large amounts of particles, glyphs, and other 
point-based data plays an important role in many fields of science, 
among them flow mechanics, molecular dynamics, and medical imaging. The 
proper perception of spatial structures and spatial relations in the 
data is crucial to the understanding.  To accommodate this aspect, we 
utilize and improve an existing ambient occlusion approach, originally 
tailored towards line rendering and extend the approach to be applicable 
to point-based visualizations.



Alle Interessierten sind im Namen von Prof. Dr. Scheuermann herzlich 
eingeladen.

Mit freundlichen Grüßen,
Patrick Oesterling