Augmented Reality, abbreviated as AR, can be defined as a
type of virtual reality where digitally rendered 2D/3D objects
that are generated by the computer are superimposed onto the
real word. Indeed, the final result is the combination of real
scene enriched with the virtual one. The main goal of these
techniques is to give users the illusion of perceive both scenes
as a single one, without notice where ends the real scene and
starts the virtual one.