Liverpool Centre for Mathematics in Healthcare

EPSRC Seminar - Variational Models for Motion Estimation in Videos - Monday 25th September 2017

Speaker: Professor Joachim Weickert, Faculty of Mathematics and Computer Science, Saarland University, Germany

Venue:  2pm, MATH103, 1st Floor, Mathematical Sciences Buidling

Abstract - The displacement field between subsequent frames in an image sequence is called optic flow. It describes the apparent motion in an image sequence and has much in common with other correspondence problems such as registration. Its applications range from video coding to robotics. In recent years, variational approaches have proven to be well-suited for computing dense optic flow fields with very high accuracy.

The goal of the talk is to survey work on variational optic flow computation that has been developed in our group within the last 15 years. Specific emphasis is put on aspects that have some relevance for image registration, such as ways to handle large displacements, the filling-in effect, design of sophisticated smoothness terms, and complementarity of data and smoothness terms. A number of experiments illustrate the performance of these concepts. Finally, an unconventional application to a non-biomedical registration problem is presented.

Short Bio - Professor Joachim Weickert is a professor of mathematics and computer science at Saarland University where he heads the Mathematical Image Analysis Group since 2001. He received a diploma and a Ph.D. degree in mathematics from the University of Kaiserslautern (1991, 1996), and a habilitation degree in computer science from the University of Mannheim (2001). He worked as research assistant at the University of Kaiserslautern, as post-doctoral researcher at the universities of Utrecht and Copenhagen, and as assistant professor at the University of Mannheim.

The scientific work of Joachim Weickert covers more than 300 refereed publications. They have led to over 22000 citations and an h-index of 68. Joachim Weickert is editor-in-chief of the Journal of Mathematical Imaging and Vision. He has been serving in the editorial boards of ten international journals and book series, and he has been reviewer for more than 70 journals and 20 funding organisations. He has given over 180 invited talks at conferences, workshops and other universities, and was area chair of seven ECCV, ICCV or CVPR conferences. Joachim Weickert has received 32 research, teaching and reviewing awards, including a Gottfried Wilhelm Leibniz Prize which belongs to the highest German research awards. In 2017 he has been awarded an ERC Advanced Grant. He is elected member of the Academia Europaea - The Academy of Europe.