There are two cases abandoned objects can be recognized
by human: (1) from controllers who sit in the server
room and watch monitors, and (2) from officers who wear
”Spyglass” and patrol in their route. Since the former is
trivial, we pay attention in the latter case. In this case,
the problem is how to locate the same object that appears
in both Spyglass and IP camera data. In another word,
when an officer recognized an abandoned object, he/she
focuses on that object for around 5 seconds, then that
object is automatically marked in IP camera data by the
blue rectangle, namely AbandonedObjectArea, to activate
the second module AOOD. This problem is the image
registration problem categorized to ”different viewpoint” and
”different sensor” groups, as analyzed in [16]. In our case,
we decide to use feature-based method (i.e., SURF-64 [2])
for feature detection and RANSAC [8] as feature matching.
Since the limitation of space, we avoid going deep inside
the detail of this module