"As the size of portable terminals continues to shrink, the user interface becomes more and more inconvenient to use. We hope to solve this dilemma" (Chris Harrison, a graduate student at Carnegie Mellon University, USA).
Researchers from Harrison and Microsoft Research have developed the "Skinput" technology that uses hand and arm surfaces as touch panels. "We have trial-produced a system that actually works" (Harrison). You can operate game consoles, music players, mobile phones, etc. by tapping lightly with your fingers on the palm, arms, etc.
The system consists of a cuff with an acoustic wave sensor installed inside and a computer. Put the cuff on the arm and gently tap the arm and palm with the fingers of the other hand, its vibration will be converted into sound pulses, and then transmitted through the skin surface. The sound wave sensor installed on the cuff detects the pulse and transmits it to the computer that analyzes the information.
Harrison and others have developed software that notifies which part of the arm is struck based on the waveform information, etc., by paying attention to the fact that the waveform and intensity of the sonic pulse change depending on the part where the arm and palm are struck. "If it is a fixed part of the arm and palm, there are less than 1 error in 20 operations. The error rate is comparable to the iPhone touch panel" (Harrison).
Skinput also separates the display function separately. The specific implementation method is to use a small projector and use the palm and arm as a display.
Skinput uses a projector to replace the mobile phone interface with a palm, etc. This is similar to the "Sixth Sense" developed by the Massachusetts Institute of Technology (MIT). The difference is that "there is no need to use a camera when using Skinput, and there is no need for image recognition and color identification, which is easier to handle" (Harrison).
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