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