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The projector projects 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. Google Glass created in 2013 is an example of a 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 at any time.

                  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                       Star Walk app
                  app then shows information about the nearby restaurants, stores and places of interest.

                                                     Disney  Research developed  a  coloring  book with  AR. After
                                                     the user colorus 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 coloured. The app also uses AR to recreate
                                                     the character in a 3D form on the screen.
                            Coloring book
                  VIRTUAL REALITY

                  In Virtual Reality, we create a virtual world that users can interact with. In this world, the user
                  cannot easily distinguish between what is real and what is virtual.

                  In both VR/AR, people must wear HMD (Head Mounted Displays)
                  or a VR  Headset  like  Oculus Rift or the Google  Cardboard.  The
                  headset has two small video display screens one for each eye. This
                  creates a sense of three-dimension. You can also wear headphones
                  and gloves to experience  VR  and AR.  The  headphones  play a
                  stereophonic sound or even 3-D sound so that feel that you are
                  hearing sounds not only near the ears but also in various places all             Virtual Reality
                  around you. The gloves have sensors to collect data about your hand movements. This equipment
                  and the software give you interactive sensory feelings similar to real-world experiences.

                  Both AR and VR provide an immersive experience to the user. These technologies find the greatest
                  use  in entertainment,  sports/gaming,  close  interactive  eye-to-eye  communication  and aided
                  shopping experiences.

                  Imagine sitting at home and browsing through a store in London where you can see and feel the
                  merchandise you wish to buy. This technology is also used in education. Imagine being a live
                  participant in a historical battle or a student of anatomy in medical school. You can really feel the
                  battle or touch the organs.




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