Joachim Weickert is Full Professor of Mathematics and Computer Science at
Saarland University (Saarbr\"ucken, Germany) where he heads the Mathematical
Image Analysis Group. He performs research in image processing, computer
vision and scientific computing, focusing on techniques based on partial
differential equations and variational methods.
Hans Hagen is heading the research group for Computer Graphics and
Computer Geometry at the University of Kaiserslautern, Germany, and is
Scientific Director of the research lab Intelligent Visualization and
Simulation at the German Research Center for Artificial Intelligence
(DFKI). His research domains are geometric modeling and scientific
visualization.