It will be possible by mobile phone camera and a library of special gestures in the phone memory (pic.). Photos of the hand gestures could be analyzed and compared with preloaded photos from the library to determine the corresponding command.
Imagine that you hold your hand open in front of your phone with your palm facing the camera’s lens. If you turn your hand around so that the back of your hand could then face the lens, it means a command that would flip any item that is currently on-screen.
May be, the further development of this idea could bring us to the construction of mobile phones with the Braille system.
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