Appropriating the Body as an Input Surface
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Transcript Appropriating the Body as an Input Surface
SKIN PUT:
APPROPRIATING THE BODY AS
AN INPUT SURFACE
P.PRANNOY CHAKRAVARTHI
&
K.B.S.MANIKANTA
BHIMAVARAM INSTITUTE OF ENGINEERING & TECHNOLOGY
EVOLUTION OF TOUCHSCREEN
Motion
tracking
is the principle
used in touchscreen
WHAT’S NEXT?
WHAT IT IS?
A novel input technique that allows
the skin to be used as a finger input
surface.
To capture this acoustic information ,
they developed a wearable armband that
is non-invasive and easily removable
http://walyou.com/touch
screen-interface-on-yourarm-with-skinput/
ENERGY THROUGH ARM
Transverse Wave Propagation
Longitudinal
Wave Propagation
A VIDEO ON SKINPUT
ARM BAND
Two arrays of five sensing elements.
Bone conduction microphones.
Microphones Placed near:
Humerus
Radius
Ulna
http://www.robaid.com/gadgets/
skinput-.htm
HOW SKINPUT WORKS
Data was then sent from the client over a
local socket to our primary application,
written in Java.
Key function of application are:
Live visualization.
Segmentation of data stream.
http://www.bestnweb.com/sk
input-touch.html
Classification of Input instances.
EXPERIMENT
Participants
13-> 7 female, 6 male.
Ages ranged from 20 to 56.
Body mass indexes (BMIs) ranged
From 20.5 (normal) to 31.9 (obese).
Each participant was made to memorize the
locations for a minute .
LOCATIONS
RESULTS
Five Fingers
When classification was incorrect, the system
believed the input to be an adjacent finger 60.5%
of the time.
Ring finger constituted 63.3% percent of the
misclassifications.
RESULTS
Whole Arm
Below elbow placed the sensors
closer to the input targets than
the other conditions.
The margin of error got double
or tripled when eyes were closed.
RESULTS
Fore Arm
Classification accuracy for the
ten-location forearm condition
stood at 81.5%.
BMI EFFECTS
High BMI is correlated with
decreased accuracies.
No direct relation with gender of the
participant.
ADVANTAGES
UI will appear much larger than on
screen
Can be used without a visual screen
Ideal for anyone with little to or no
eyesight
CONCLUSION
Since we cannot simply make buttons and
screens larger it will be an alternative
approach
Skin put's are not available yet, but
could be in the next few years.
REFERENCES
1. Ahmad, F., and Musilek, P. A Keystroke and Pointer Control
Input Interface for Wearable Computers. In Proc. IEEE
PERCOM ’06, 2-11.
2. Amento, B., Hill, W., and Terveen, L. The Sound of One
Hand: A Wrist-mounted Bio-acoustic Fingertip Gesture Interface.
In CHI ‘02 Ext. Abstracts, 724-725.
3. Argyros, A.A., and Lourakis, M.I.A. Vision-based Interpretation
of Hand Gestures for Remote Control of a Computer
Mouse . In Proc. ECCV 2006 Workshop on Computer Vision in
HCI, LNCS 3979, 40-51.
4.Images from www.google.com