Event-Based Motion Segmentation by Motion Compensation ← Department of Cybernetics

Ondřej Holešovský presents Event-Based Motion Segmentation by Motion Compensation

On 2019-11-05 11:00:00 at G205, Karlovo náměstí 13, Praha 2
Reading group on the work "Event-Based Motion Segmentation by Motion
Compensation" (ICCV 2019) by T. Stoffregen, G. Gallego, T. Drummond,L. Kleeman,
D. Scaramuzza presented by Holesovsky Ondrej.

Paper abstract: In contrast to traditional cameras, whose pixels have a common
exposure time, event-based cameras are novel bio-inspired sensors whose pixels
work independently and asynchronously output intensity changes (called
"events"), with microsecond resolution. Since events are caused by the apparent
motion of objects, event-based cameras sample visual information based on the
scene dynamics and are, therefore, a more natural fit than traditional cameras
to acquire motion, especially at high speeds, where traditional cameras suffer
from motion blur. However, distinguishing between events caused by different
moving objects and by the camera's ego-motion is a challenging task. We present
the first per-event segmentation method for splitting a scene into
independently moving objects. Our method jointly estimates the event-object
associations
(i.e., segmentation) and the motion parameters of the objects (or the
background) by maximization of an objective function, which builds upon recent
results on event-based motion-compensation. We provide a thorough evaluation of
our method on a public dataset, outperforming the state-of-the-art by as much
as 10%. We also show the first quantitative evaluation of a segmentation
algorithm
for event cameras, yielding around 90% accuracy at 4 pixels relative
displacement.

Paper URL: https://arxiv.org/pdf/1904.01293.pdf

Instructions for participants: The reading group studies the literature in the
field of pattern recognition and computer vision. At each meeting one or more
papers are prepared for presentation by a single person, the presenter. The
meetings are open to anyone, disregarding their background. It is assumed that
everyone attending the reading group has, at least briefly, read the paper –
not necessarily understanding everything. Attendants should preferably send
questions about the unclear parts to the speaker at least one day in advance.
During the presentation we aim to have a fruitful discussion, a critical
analysis of the paper, as well as brainstorming for creative extensions.

See the page of reading groups
http://cmp.felk.cvut.cz/~toliageo/rg/index.html
Responsible person: Petr Pošík