[Forschungsseminar-BSV] Forschungsseminar Computergrafik, Bildverarbeitung und Visualisierung

[Christian Heine]

E I N L A D U N G

zum Forschungsseminar Computergrafik, Bildverarbeitung und
Visualisierung am Donnerstag den 2010-10-21, 15:15 Uhr, Raum 1-40 in
der Johannisgasse 26.


Wir hören einen Vortrag von

     Patrick Oesterling
     Universität Leipzig

mit dem Titel

     "Two-stage Framework for a Topology-Based Projection and
     Visualization of Classified Document Collections"


zum Inhalt:

During the last decades, electronic textual information has become
the world’s largest and most important information source available. 
People have added a variety of daily newspapers, books, scientific 
and governmental publications, blogs and private messages
to this wellspring of endless information and knowledge. Since 
neither the existing nor the new information can be read in its 
entirety, computers are used to extract and visualize meaningful or 
interesting topics and documents from this huge information clutter.

In this paper, we extend, improve and combine existing individual 
approaches into an overall framework that supports topological 
analysis of high dimensional document point clouds given by the 
well-known tf-idf document-term weighting method. We show why 
traditional distance-based approaches fail in very high dimensional 
spaces, and we describe an improved two-stage method for 
topology-based projections from the original high dimensional 
information space to both two dimensional (2D) and three dimensional 
(3D) visualizations. To show the accuracy and usability of this 
framework, we compare it to methods introduced recently and apply it 
to complex document and patent collections.

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

Mit freundlichen Grüßen,
Christian Heine