P.PRANNOY CHAKRAVARTHI & K.B.S.MANIKANTA BHIMAVARAM INSTITUTE OF ENGINEERING & TECHNOLOGY SKIN PUT: APPROPRIATING THE BODY AS AN INPUT SURFACE

EVOLUTION OF TOUCHSCREEN WHAT’S NEXT?  Motion tracking is the principle used in touch- screen

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 screen-interface-on-your- arm-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 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.  Classification of Input instances. input-touch.html

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 (o bese).  Each participant was made to memorize the locations for a minute.

LOCATIONS

 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%. RESULTS

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  Skin put's are not available yet, but could be in the next few years.  Since we cannot simply make buttons and screens larger it will be an alternative approach

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