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AR is not a new technology. It was used in the display panels of fighter aircraft in the 1990s. The
                 panel displayed information about the altitude, direction and speed of the aircraft. A few years
                 later the panels displayed the target objects.
                 In  2009, Massachusetts Institute of Technology’s
                 developed  SixthSense. It  is a  small device  that  is

                 worn  like a pendant  and combines  the use of a
                 camera,  small projector, smartphone  and  mirror.
                 The projector and the camera are connected to the
                 mobile  device in the user’s pocket. The projector
                 projects the visual information on physical surfaces
                 such as walls  and other objects. The camera
                 recognizes and tracks the user’s hand gestures with
                 the help of computer-vision techniques.
                                                                                         SixthSense device

                                                        Google Glass created in 2013 is an example of wearable AR
                                                        interface. It helps the user to remain focussed on the work.

                                                        It displays on the  user’s glass screen  through a  small
                                                        projector. It responds to voice commands to activate an
                                                        application any time.
                             Google Glass

                 AR enters the lives of most people through phones
                 and tablets. Vito Technology’s Star Walk app lets a
                 user point their phone or tablet camera at the sky and
                 see the names of stars and planets superimposed on

                 the image. One more app called Layar uses the GPS
                 location of the smartphone and the camera to collect
                 information about the user’s surroundings. The app
                                                                                           Star Walk app
                 then shows information about the nearby restaurants,
                 stores and places of interest.


                                                             Disney Research  developed a  coloring  book with
                                                             AR.  After the user colors in a character in the book,
                                                             he/she launches the app on the device. The app uses
                                                             the camera to detect the character that was colored.

                                                             The app also uses AR to recreate the character in a 3D
                                                             form on the screen.



                               Coloring book


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