Systems Seminar
Where and When Are These Pictures Taken?
Prof. Hassan Foroosh
School of Computer Science
University of Central Florida
Abstract
Imagine you are given a few outdoor pictures and asked to identify where
on earth the pictures are taken, and what day of the year they correspond to.
It is known and commonly accepted today in coputer vision literature that if
a camera can be calibrated, then one can determine information about the
world up to only a similarity transformation. If in addition some metric
information is available then one can also determine the actual euclidean
geometry. In this talk, my goal is to demonstrate that under certain
conditions one can go well beyond these limits. I will make interesting
connections with astronomy and establish a method that will enable us to
determine the GPS latitude and the day of the year were the pictures are
taken using only visual cues. I will also show how the longitude can be
recovered directly from images if additional information is available.
The talk is divided into two parts: it starts with some new ideas and
solutions for auto-calibration, and then extends to establishing
connections with astronomy for geo-temporal localization. We have
performed an initial validation of this intriguing technique using
both synthetic and real data.
Time and Place: Wed., Mar. 28, at noon in 4610 Engr. Hall.
*** NOTE SPECIAL TIME ***
SYSTEMS SEMINAR WEB PAGE:
http://homepages.cae.wisc.edu/~gubner/seminar/schedule.html