Finexus: Tracking Precise Motions of Multiple Fingertips Using Magnetic Sensing

被引:97
作者
Chen, Ke-Yu [1 ]
Patel, Shwetak [1 ]
Keller, Sean [2 ]
机构
[1] Univ Washington, DUB, UbiComp Lab, Seattle, WA 98195 USA
[2] Oculus Res, Redmond, WA USA
来源
34TH ANNUAL CHI CONFERENCE ON HUMAN FACTORS IN COMPUTING SYSTEMS, CHI 2016 | 2016年
关键词
Magnetic field; fingertips; tracking; 3D space; wearable; localization; electromagnet; real-time;
D O I
10.1145/2858036.2858125
中图分类号
TP18 [人工智能理论];
学科分类号
081104 ; 0812 ; 0835 ; 1405 ;
摘要
With the resurgence of head-mounted displays for virtual reality, users need new input devices that can accurately track their hands and fingers in motion. We introduce Finexus a multipoint tracking system using magnetic field sensing. By instrumenting the fingertips with electromagnets, the system can track fine fingertip movements in real time using only four magnetic sensors. To keep the system robust to noise, we operate each electromagnet at a different frequency and leverage bandpass filters to distinguish signals attributed to individual sensing points. We develop a novel algorithm to efficiently calculate the 3D positions of multiple electromagnets from corresponding field strengths. In our evaluation, we report an average accuracy of 1.33 mm, as compared to results from an optical tracker. Our real-time implementation shows Finexus is applicable to a wide variety of human input tasks, such as writing in the air.
引用
收藏
页码:1504 / 1514
页数:11
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