Skinput is a technology that uses bio-acoustic sensing and pico projectors to turn the human body into an input surface. It allows users to control devices by simply tapping on their skin. Sensors detect vibrations and acoustic waves produced within the body when a finger taps the skin. These signals are sensed by an arm band containing wave sensors connected via Bluetooth. Skinput provides an always available mobile input without requiring the user to directly interact with or carry a device. However, it can be sensitive to environmental noise and accuracy depends on body type. Potential applications include use with mobile devices, gaming, assistive technology for paralyzed individuals, and more.

1. Appropriating the Body
as an Input Surface
Presented By:-
Patnam Shruthi

2. CONTENTS
 What is Skinput
 Why Skinput?
 Principle of skinput
 How it works
 Advantages
 Dis-advantages
 Applications
 Future Implications
 Conclusion

3. What is Skinput
 Giving input through skin.
 Was developed by Chris Harrison,Desne
Tan and Dan morris.
 Skinput turns the body into a touch screen
surface.

4. Cont…
 Skinput allows the user to simply tap their
skin in order to control audio devices, play
games, make phone calls.
 It uses the sensors to determine where
the user taps on their skin.

5. Why Skinput?
 Devices with small sized have some limitations.
 Since can’t make buttons and screens larger
without loosing benefit of small sized.
 The main reason for appropriating the Human
body as an input device are:
 Easily accessible by hands.

6. Principle of Skinput
 It listens to vibrations in your body.
 Skinput also responds to the various hand
gestures.
 The arm is an instrument.

7. Technology Used
 Skinput, is an input technology that uses
bio-acoustic sensing and pico projectors.
 Pico projector applies the use of projector
in a hand held device.
 An acoustic detector detects the ultra low
frequency.

8. Bio-Acoustics
 Study of sound waves inside living body.
 When a finger taps the skin, several
distinct forms of acoustic energy are
produced.
 Longitudinal Waves
 Transverse Waves

10. Pico Projector
 It is also known as pocket projector or
mobile projector.
Bluetooth
 Bio acoustic sensors are connected to
the mobile Bluetooth.
 A software to match sound frequencies
to specific skin location is used.
 Corresponding action is implemented in
the device.

11. Bio-Acoustics: Sensing
 These signals need to be sensed and
worked upon.
 This is done by wearing the wave sensor
arm band.

15. Percent Accuracy

16. Advantages
 No need to interact with the gadget
directly.
 Don’t have to worry about keypad.
 People with larger fingers get trouble in
navigating tiny buttons and keypads on
mobile phones. With skinput this problem
disappears.

17. Disadvantages:
 Acoustically driven input techniques are often
Sensitive to environmental noise.
 Accuracy depends on Body Mass Index(BMI).

18. Applications
 Mobile
 Gaming
 I-pods
 An aid to paralyzed
persons.

19. Conclusion
 It provides an always available mobile
input system that does not require a user
to carry or pick up a device.
 Results from experiments have shown that
it performs very well for a series of
gestures, even when the body is in
motion.

20. Future Implications
 With small sized Pico-projectors, Skinput
oriented systems, are an emerging trend.
 Research is carrying on for smaller wrist
watch sized sensor arm band.

22. THANK YOU