The weekly SILO Seminar Series is made possible through the generous support of the 3M Company and its Advanced Technology Group


with additional support from the Analytics Group of the Northwestern Mutual Life Insurance Company

Northwestern Mutual

Looking Around Corners by capturing Light in Motion

Andreas Velten, Morgridge Institute for Research

Date and Time: May 16, 2012 (12:30 PM)
Location: Orchard room (3280) at the Wisconsin Institute for Discovery Building


What does the world look like at a trillion frames per second?
Creative use of high-end laboratory equipment allows us to capture high
resolution 2D videos of repetitive events with an effective time resolution of
2 picoseconds. In these videos, light moves less than one millimeter in each
frame. The motion of a light pulse and the propagation of light through a
scattering medium become visible. Time of flight becomes an additional
dimension of data accessible in light capture.

Time of flight imaging allows us to do many fundamentally new things in
computer vision. The ability to effectively analyze multibounce light transport
enables imaging around a corner, capturing of material properties and the
analysis of sub surface scattering. Visualizing the captured data directly
gives a fascinating intuitive insight into real-time light transport.

We have recently demonstrated the reconstruction of objects around a corner
in a table top setup. Applications of this new ability are in disaster
response, robot navigation, and medical imaging.