skinput: appropriating the body as an input surface
TRANSCRIPT
Skinput: Appropriating the Body as an Input Surface
Chris Harrison, Desney Tan, Dan Morris
Summarized & Presented by:Reem Alattas
Skinput
• A technology that appropriates the human body for acoustic transmission, allowing the skin to be used as an input surface.
Introduction
• Handheld devices– Size vs. Computational Power
• Alternative interaction methods
Related Work
• Always-Available Input– Skin– Computer Vision– Speech Input– Wearable Computing• Glove-based Input• Smart Fabric• SixthSense
• Computationally expensive
• Error prone in mobile scenarios
• Limited precision • Privacy and
scalability issues
Related Work
• Bio-Sensing– Brain sensing technologies• EEG• fNIR
Skinput
• An input technique that allows the skin to be used as a finger input surface.
Bio-Acoustics
• Transverse wave propagation
• Longitudinal wave propagation
Sensing
• An array of highly tuned vibration sensors
Processing
Experiment
• 13 Participants (7 females)• Seattle area• Age range: 20 – 56 (mean 38.3)• BMI range: 20.5 (normal) – 31.9 (obese)• 1 lefty
Experimental Conditions
• Fingers (Five Locations)• Whole Arm (Five Locations)• Forearm (Ten Locations)
Procedure
• Participants practiced tapping approximately one minute with each gesture set.
• Participants were instructed to comfortably tap each location ten times, with a finger of their choosing.– 3 rounds of training data were collected per input
location set (30 examples per location, 150 data points total)
– Forearm Exception: two rounds were collected (20 examples per location, 200 data points total)
Results
• Five Fingers– Average accuracy 87.7%
• Whole Arm– Below elbow average accuracy 95.5%– Above elbow average accuracy 88.3%
• Forearm– Average accuracy 81.5%
Accuracy
BMI Effects
• High BMI is correlated with decreased accuracies.
Supplemental Experiments
• Walking and Jogging• Single-Handed Gestures• Surface and Object Recognition• Identification of Finger Tap Type• Segmenting Finger Input
Conclusion
• The proposed approach appropriates the human body as an input surface.
Questions