AuraRing: Precise electromagnetic finger tracking

被引：51

作者：

Parizi F.S. ^{[1
]}

Whitmire E. ^{[1
]}

Patel S. ^{[1
]}

机构：

[1] University of Washington, Seattle, WA

来源：

Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies | 2019年 / 3卷 / 04期

关键词：

Electromagnetic tracking; Finger tracking; Input; Mixed reality; Wearable;

D O I：

10.1145/3369831

中图分类号：

学科分类号：

摘要：

Wearable computing platforms, such as smartwatches and head-mounted mixed reality displays, demand new input devices for high-fidelity interaction. We present AuraRing, a wearable magnetic tracking system designed for tracking fine-grained finger movement. The hardware consists of a ring with an embedded electromagnetic transmitter coil and a wristband with multiple sensor coils. By measuring the magnetic fields at different points around the wrist, AuraRing estimates the five degree-of-freedom pose of the ring. We develop two different approaches to pose reconstruction-a first-principles iterative approach and a closed-form neural network approach. Notably, AuraRing requires no runtime supervised training, ensuring user and session independence. AuraRing has a resolution of 0.1mm and a dynamic accuracy of 4.4mm, as measured through a user evaluation with optical ground truth. The ring is completely self-contained and consumes just 2.3mW of power. Copyright © 2019 held by the owner/author(s).

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