is a technology
that allows computer-generated virtual
imagery information to be overlaid onto a
live direct or indirect real-world environment in
real time (Azuma, 1997; Zhou, Duh, & Billing
-
hurst, 2008). AR is different from Virtual Reality
(VR) in that in VR people are expected to experi
-
ence a computer-generated virtual environment.
In AR, the environment is real, but extended
with information and imagery from the system.
In other words, AR bridges the gap between the