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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 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  colouring  book app with AR.
                                                    After the user colours 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.
                           Colouring 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 you can feel that
                 you are hearing sounds not only near the ears but also in various               Virtual Reality
                 places all 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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