BackSwipe: Back-of-device Word-Gesture Interaction on Smartphones
BackSwipe: Back-of-device Word-Gesture Interaction on Smartphones
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DOI：
10.1145/3411764.3445081
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发表时间：
2021-05
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影响因子：
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通讯作者：
Wenzhe Cui;Suwen Zhu;Zhi Li;Zheer Xu;Xing-Dong Yang;I. Ramakrishnan;Xiaojun Bi
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文献类型：
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作者：
Wenzhe Cui;Suwen Zhu;Zhi Li;Zheer Xu;Xing-Dong Yang;I. Ramakrishnan;Xiaojun Bi
设备互动是在智能手机上进行互动的一种有前途的方法。在本文中，我们创建了一个称为Backwipe的回头命令和文本输入技术，该技术允许用户用一只手握住智能手机，并使用同一只手的食指在任何地方绘制单词范围智能手机的背面输入命令和文本。为了支持BackSwipe，我们提出了一种启动的单词手势解码算法，该算法从设备的背面手势中渗透了键盘位置，并调整键盘大小以适合手势尺度；然后将推断的键盘送回系统以进行解码。我们的用户研究表明，背面是可行的，并且是一种有希望的输入方法，尤其是对于单手持有姿势的命令输入：用户可以以5.32秒/命令的速度以92％的平均精度输入命令。文本输入性能因用户而异。平均速度为9.58 wpm，一些用户为18.83 wpm；平均单词错误率为11.04％，某些用户为2.85％。总体而言，Backswipe通过利用设备的背面作为手势输入表面来补充现有的智能手机交互。
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.