Paper Info
Title
BackSwipe: Back-of-device Word-Gesture Interaction on Smartphones
Abstract
ABSTRACT Back-of-device interaction is a promising approach to interacting on smartphones. In this paper, we create a back-of-device command and text input technique called BackSwipe, which allows a user to hold a smartphone with one hand, and use the index finger of the same hand to draw a word-gesture anywhere at the back of the smartphone to enter commands and text. To support BackSwipe, we propose a back-of-device word-gesture decoding algorithm which infers the keyboard location from back-of-device gestures, and adjusts the keyboard size to suit the gesture scales; the inferred keyboard is then fed back into the system for decoding. Our user study shows BackSwipe is feasible and a promising input method, especially for command input in the one-hand holding posture: users can enter commands at an average accuracy of 92% with a speed of 5.32 seconds/command. The text entry performance varies across users. The average speed is 9.58 WPM with some users at 18.83 WPM; the average word error rate is 11.04% with some users at 2.85%. Overall, BackSwipe complements the extant smartphone interaction by leveraging the back of the device as a gestural input surface.
Year
DOI
Venue
2021
10.1145/3411764.3445081
Conference on Human Factors in Computing Systems
Keywords
DocType
Volume
Text entry, command input, word-gesture shortcuts, touchscreen, smartphones
Conference
2021
Citations 
PageRank 
References 
0
0.34
0
Authors
7
Name
Order
Citations
PageRank
Wenzhe Cui102.37
Suwen Zhu2243.76
Zhi Li331418.82
Zheer Xu4102.11
Xing-Dong Yang59410.07
I. V. Ramakrishnan61969214.75
Xiaojun Bi749032.68