In recent years, smart devices in the form of smartphones and
smart pads have become widely available with the development of
networks, the miniaturization of the Central Processing Unit (CPU),
and the advancement of mobile technology [1]. Smart devices are
equipped with several built-in sensors, including cameras, and
allow intuitive inputs via a capacitive touch screen. In addition,
wireless networks are available through various paths, such as WiFi, 3G, Long-Term Evolution (LTE) and Bluetooth. The lightweight
and portable design makes smart devices ideal for use on the
move [2].