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The Microsoft company have developed Skinput, a technology that appropriates the human body for acoustic transmission, allowing the skin to be used as an input surface. In particular, we resolve the location of finger taps on the arm and hand by analyzing mechanical vibrations that propagate through the body. We collect these signals using a novel array of sensors worn as an armband. This approach provides an always available, naturally portable, and on-body finger input system. We assess the capabilities, accuracy and limitations of our technique through a two-part, twenty-participant user study. To further illustrate the utility of our approach, we conclude with several proof-of-concept applications we developed.
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SEMINAR ON
SKINPUT
Presented By:PATEL PRANAV H.
Contents Introduction What is Skinput ? Difference between touchscreen and Skinput What Skinput Does What make it works How it works Input location Accuracy BMI Effect Applications Advantages Disadvantages Future Implications Conclusion Reference
IntroductionDeveloped by Chris Harrison, Desney Tan, And
Dan Morris of the Microsoft Research’s.Microsoft’s Techfest 2010.Technology that appropriates the Human Body for
Acoustic Transmission.Project is Under Active Development. Not Available Commercially.
What is “Skinput”?
Skinput is a technology that appropriates the human body for acoustic transmission.
Skin used as an input surface.Developed by Chris Harrison(Carnegie Mellon
University), Microsoft Research.
Difference B/W TouchScreen and Skinput
Touch Screen
(Physical Interface Needed)
SKINPUT
(No Physical Interface required)
WHAT SKINPUT DOES ?Allows User to Tap their Skin.Uses Series of Sensor to determine Tap location.Detect Waves.Body Creates different types of variations
Depending on the features of Bones and Muscles.Skinput listens to these Variation to determine
Tapped location.
WHAT MAKES IT WORKS ?
Pico – projector Bluetooth Bio – Acoustic
HOW SKINPUT WORKS ?
Pico – Projector :
Small Size ProjectorUsed for display purpose in skinput system.
(Contd..)
Bio – acoustics:
Study of sound wave inside human body.When finger taps following waves are produced.
1) Transverse Waves
2) Longitundinal WavesThese waves serve input for a system.
Finger impacts displace the skin, creating transverse waves. The sensor is activated as the wave passes underneath it.
Bio-Acoustics
Transverse wave propagation
(Contd..)
Longitudinal wave propagation
• Finger impacts create longitudinal (compressive) waves that cause internal skeletal structures to vibrate.
ARMBAND
Consists of Two Array of Five Sensing Elements.Armband containing piezoelectric cantilevers
– sensors.The upper sensor array is more sensitive to Lower
frequency signal.The Lower sensor array is sensitive to higher
ferquencies.
Processing
Input Location
Place the Sensor above the Elbow. video
Accuracy
Figure. Higher accuracies can be achieved by collapsing the ten input locations into groups.
BMI Effect
BMI is referred as Body Mass Index.High BMI tends to decrease of Accuracy.The Participants with the 3 Highest BMIs(29.2,
29.6 and 31.9 – Representing Borderline obese to obese) Produce the Three lowest average Accuracies.
Applications
MobileGamingI-podsSimpler Browsing Systems.
Advantages
No Need to Interact with the Gadgets directly.A new way of operating a mobile phone.People with larger fingers get trouble in
Navigating tiny buttons on Mobile Phones. With Skinput that problems disappear.
DisadvantagesAccuracy can degrade.High cost.Band seems easy enough to Slip on.
Future Implications
With Small sized Pico Projectors, skinput oriented systems are an Emerging trend.
Research is carried out for Smaller Wrist Watch sized sensor armband.
Conclusion
System performs very well for a series of Gestures even if the body is in motion.
This Approach provides an always available, Naturally portable and on body finger input system.
Skinput is very interesting technology.
References
http://www.chrisharrison.net/index.php/Research/Skinputhttp://www.research.microsoft.com/en-us/um/.../harrisons
kinputchi2010.pdfhttp://www.youtube.com/watch?v=g3XPUdW9Ryg