[Forschungsseminar-BSV] Forschungsseminar Computergrafik, Bildverarbeitung und Visualisierung

[Patrick Oesterling]

I N V I T A T I O N

to the Research Seminar 'Computer Graphics, Image Processing and 
Visualization' on Wednesday, January  15th, 2014, at 1:15 PM, in Room 
P-701 in the Paulinum, Augustusplatz.


The talk is given by

Vijay Natarajan
Associate Professor
Dept. of Computer Science and Automation
Supercomputer Education and Research Centre
Indian Institute of Science, Bangalore

and is entitled

"Symmetry in Scalar Fields"


Abstract:

Several natural and man-made objects exhibit symmetry in different 
forms, both in their geometry and in the material distribution. The 
study of symmetry plays an important role in understanding both the 
structure of these objects and their physical properties. The notion of 
symmetry with respect to the geometry of an object or domain is well 
understood. In this talk, I will introduce the problem of symmetry 
detection in a scalar field. This refers to identifying regions within 
the domain of a scalar field that remain invariant under geometric 
transformations with respect to both the domain geometry and the scalar 
values. Symmetry detection in scientific data is still a nascent area of 
research and existing methods that detect symmetry are either not robust 
in the presence of noise or are computationally costly.

I will present a recently developed method that detects symmetry in, 
potentially noisy, 3D scalar fields without an explicit construction of 
the corresponding geometric transformation. The key ingredient in the 
algorithm is a data structure called the augmented extremum graph that 
captures both topological and geometric properties of the scalar field. 
I will also briefly discuss other methods that we have developed to 
identify symmetric regions and also demonstrate applications to 
symmetry-aware volume rendering, isosurface extraction, query-based 
exploration, linked selection and volume editing.

http://vgl.serc.iisc.ernet.in


On behalf of Professor Scheuermann all those interested are cordially 
invited to attend.


Yours sincerely,
Patrick Oesterling