Editing Augmented reality (section)

===Projection mapping===
[[Projection mapping]] augments real-world objects and scenes without the use of special displays such as monitors, head-mounted displays or hand-held devices. Projection mapping makes use of digital projectors to display graphical information onto physical objects. The key difference in projection mapping is that the display is separated from the users of the system. Since the displays are not associated with each user, projection mapping scales naturally up to groups of users, allowing for collocated collaboration between users.

Examples include [[shader lamps]], mobile projectors, virtual tables, and smart projectors. Shader lamps mimic and augment reality by projecting imagery onto neutral objects. This provides the opportunity to enhance the object's appearance with materials of a simple unit—a projector, camera, and sensor.

Other applications include table and wall projections. Virtual showcases, which employ beam splitter mirrors together with multiple graphics displays, provide an interactive means of simultaneously engaging with the virtual and the real.

A projection mapping system can display on any number of surfaces in an indoor setting at once. Projection mapping supports both a graphical visualization and passive [[Haptic perception|haptic]] sensation for the end users. Users are able to touch physical objects in a process that provides passive haptic sensation.<ref name="Azuma_survey" /><ref name="raskarSAR">Ramesh Raskar, Greg Welch, Henry Fuchs [https://web.archive.org/web/19981205111134/http://www.cs.unc.edu/~raskar/Office/ Spatially Augmented Reality], First International Workshop on Augmented Reality, Sept 1998.</ref><ref>Knight, Will. [https://www.newscientist.com/article/dn7695 Augmented reality brings maps to life] 19 July 2005.</ref><ref>Sung, Dan. [http://www.pocket-lint.com/news/38802/augmented-reality-maintenance-and-repair Augmented reality in action – maintenance and repair]. ''Pocket-lint'', 1 March 2011.</ref>