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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 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.
                      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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