Skinput: Overview Touchscreen and skinput devices Need of skinput Functioning of skinput Working of Skinput Bio-Acoustics Processing Armband Software Specifications Other technologies
Skinput is a collaboration between Chris Harrison at Cambridge Mellon university and Dan Morris at Microsoft’s research lab Touch screen gadgets have become popular due to the advantage they come with Skinput turns body into touch screen interface
Device with touch available. Certain drawbacks of these devices present. Some drawbacks are: Small contact area Less accurate interactions Cannot make button larger without using primary benefit of small size.
Primary functions are: Control audio devices Play games Make phone calls Navigate browsing systems Uses series of sensors to determine where user tapped on skin
Pico-Projector A very small projector Used in compact gadgets E.g.. Spice Popcorn (mobile cum projector)
Bio-Acoustics: Study of sound waves inside body When finger taps the skin, several distinct forms of acoustics energy are produced Longitudinal Waves Transverse Wave The waveforms form the integral part of skinput
Finger touch displaces skin Creates transverse wave (ripple) Sensor activated as wave passes under it.
Each body part creates different type of vibrations depending on: Bones Muscles Tendons These signal need to be sensed and worked upon. This is done by wearing wave sensor armbands Sensing elements detect vibrations transmitted through the body.
Sensing elements detect vibrations transmitted through the body. Contain five, specially weighted piezo films Responsive to a particular frequency range.
Primary application, written in Java Three key functions Provides a live visualization of the data It segments inputs from the data stream into independent instances (taps). Classified these input instances.
Speech input Wearable computing Glove based input systems Smart fabric Sixth Sense
Bulky armband cannot be carried everywhere. Research needs to be done to integrate it in more devices
Single handed gestures Taps with different parts of the finger Differentiating between materials and objects. Reduction in size of armband.
Skin as input Wearable bio-acoustic sensors Skinput V/S Other technologies Improvements for skinput