The application of computer-generated imagery in live-video streams as a way to enhance the perception of the real world.
Ronald Azuma offered a definition in 1997.
Azuma's definition says: Augmented Reality combines real and virtual and is interactive in real time and is registered in 3D.
Augmented Reality is found in modern smartphones that use a Camera, GPS, Accelerometer or a Solid State Compass.

One of the first commercial applications of Augmented Reality was the first down line indicated in yellow in televised football games.
