Introduction
Augmented (or enhanced or supplemented) reality (AR) is a technology that adds an extra
layer of virtual information on top of the perception of the real world, in real-time. AR
technically can be used to enhance all five senses, but its most common present-day use is
visual. Usually the virtual layer consists of 3D objects or 3D scenes, with or without sound.
Sometimes only textual info is added. Everyone from tourists, to soldiers, to someone
looking for the closest subway stop can now benefit from the ability to place computergenerated graphics in their field of vision.
layer of virtual information on top of the perception of the real world, in real-time. AR
technically can be used to enhance all five senses, but its most common present-day use is
visual. Usually the virtual layer consists of 3D objects or 3D scenes, with or without sound.
Sometimes only textual info is added. Everyone from tourists, to soldiers, to someone
looking for the closest subway stop can now benefit from the ability to place computergenerated graphics in their field of vision.
The Dutch company Layar developed an application for smartphones (also called Layar)
which uses the phone’s camera and GPS capabilities to gather information about the
surrounding area. Layar then shows information about restaurants or other sites in the
area, overlaying this information on the phone’s screen. You can even point the phone at a
building, and Layar will tell you if any companies in that building are hiring, or it might be
able to find photos of the building on Flickr or to locate its history on Wikipedia.
Requirements for AR:
In terms of Hardware:
▶ a computer, either a PC or a mobile device;
▶ a monitor or display screen;
▶ a camera;
▶ tracking and sensing systems (GPS, compass, accelerometer);
▶ a network infrastructure;
▶ a marker: markers are physical objects or places where the real and virtual environment
are fused together. This is what the computer identifies as the place where digital
information is to be presented.
In terms of Software:
▶ an app or program running locally;
▶ web services;
▶ a content server
Conclusion
Augmented reality (AR) is a technology in which computer-generated images (sometimes
sound and textual info is also added) are imposed on reality. Thus, AR does not replace the
real world but coexists with it in a particular place and time, enriching it with, among other
things, additional information or objects . Reality enriched in this way is
available only to people using appropriate devices equipped with specific software. In view
of the fact that sight is the principal human sense, the vast majority of the information
processed by AR is presented in graphical form; less frequently in the form of sound or tactile
stimuli. In other words, AR can be defined as a technology with the following characteristics:
▶ it combines the real world with virtual reality (VR);
▶ it is interactive in real time;
▶ it allows freedom of movement in three dimensions.
sound and textual info is also added) are imposed on reality. Thus, AR does not replace the
real world but coexists with it in a particular place and time, enriching it with, among other
things, additional information or objects . Reality enriched in this way is
available only to people using appropriate devices equipped with specific software. In view
of the fact that sight is the principal human sense, the vast majority of the information
processed by AR is presented in graphical form; less frequently in the form of sound or tactile
stimuli. In other words, AR can be defined as a technology with the following characteristics:
▶ it combines the real world with virtual reality (VR);
▶ it is interactive in real time;
▶ it allows freedom of movement in three dimensions.
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