Tilting operations for small screen interfaces
Proceedings of the 9th annual ACM symposium on User interface software and technology
EdgeWrite: a stylus-based text entry method designed for high accuracy and stability of motion
Proceedings of the 16th annual ACM symposium on User interface software and technology
HybridTouch: an intuitive manipulation technique for PDAs using their front and rear surfaces
Proceedings of the 8th conference on Human-computer interaction with mobile devices and services
Camera phone based motion sensing: interaction techniques, applications and performance study
UIST '06 Proceedings of the 19th annual ACM symposium on User interface software and technology
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Lucid touch: a see-through mobile device
Proceedings of the 20th annual ACM symposium on User interface software and technology
Barrier pointing: using physical edges to assist target acquisition on mobile device touch screens
Proceedings of the 9th international ACM SIGACCESS conference on Computers and accessibility
Escape: a target selection technique using visually-cued gestures
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
The performance of hand postures in front- and back-of-device interaction for mobile computing
International Journal of Human-Computer Studies
Back-of-device interaction allows creating very small touch devices
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Proceedings of the 22nd annual ACM symposium on User interface software and technology
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Usable gestures for mobile interfaces: evaluating social acceptability
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
RearType: text entry using keys on the back of a device
Proceedings of the 12th international conference on Human computer interaction with mobile devices and services
Gesture avatar: a technique for operating mobile user interfaces using gestures
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Sensor synaesthesia: touch in motion, and motion in touch
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
DoubleFlip: a motion gesture delimiter for mobile interaction
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
PalmSpace: continuous around-device gestures vs. multitouch for 3D rotation tasks on mobile devices
Proceedings of the International Working Conference on Advanced Visual Interfaces
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We present LensGesture, a pure software approach for augmenting mobile interactions with back-of-device finger gestures. LensGesture detects full and partial occlusion as well as the dynamic swiping of fingers on the camera lens by analyzing image sequences captured by the built-in camera in real time. We report the feasibility and implementation of LensGesture as well as newly supported interactions. Through offline benchmarking and a 16-subject user study, we found that 1) LensGesture is easy to learn, intuitive to use, and can serve as an effective supplemental input channel for today's smartphones; 2) LensGesture can be detected reliably in real time; 3) LensGesture based target acquisition conforms to Fitts' Law and the information transmission rate is 0.53 bits/sec; and 4) LensGesture applications can improve the usability and the performance of existing mobile interfaces.