research-article

AuraRing: Precise Electromagnetic Finger Tracking

Authors:

Farshid Salemi Parizi,

Shwetak PatelAuthors Info & Claims

Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies, Volume 3, Issue 4

Article No.: 150, Pages 1 - 28

https://doi.org/10.1145/3369831

Published: 14 September 2020 Publication History

Abstract

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 0.1 mm and a dynamic accuracy of 4.4 mm, as measured through a user evaluation with optical ground truth. The ring is completely self-contained and consumes just 2.3 mW of power.

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Cited By

Quan PMao ZChen NZhang YZhang KPan Z(2025)Attentive Fusion for Efficient Wrist-Worn Gesture Recognition Based on Dual-View CamerasIEEE Sensors Journal10.1109/JSEN.2024.350057625:1(2008-2018)Online publication date: 1-Jan-2025
https://doi.org/10.1109/JSEN.2024.3500576
Qian BGuo XBoateng GAn RLiu HLai ZChen C(2025)Magnetoquasistatic Positioning: Recent Advances, Applications, Potential Solutions, and Future ProspectsIEEE Internet of Things Journal10.1109/JIOT.2024.352108412:6(6250-6274)Online publication date: 15-Mar-2025
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Huang KIravantchi YChen DSample A(2024)MagDesk: Interactive Tabletop Workspace Based on Passive Magnetic TrackingProceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies10.1145/36997568:4(1-31)Online publication date: 21-Nov-2024
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Index Terms

AuraRing: Precise Electromagnetic Finger Tracking
1. Human-centered computing
  1. Human computer interaction (HCI)
    1. Interaction devices
  2. Ubiquitous and mobile computing

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cover image Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies

Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies Volume 3, Issue 4

December 2019

873 pages

EISSN:2474-9567

DOI:10.1145/3375704

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Copyright © 2019 ACM.

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Published: 14 September 2020

Published in IMWUT Volume 3, Issue 4

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Cited By

Quan PMao ZChen NZhang YZhang KPan Z(2025)Attentive Fusion for Efficient Wrist-Worn Gesture Recognition Based on Dual-View CamerasIEEE Sensors Journal10.1109/JSEN.2024.350057625:1(2008-2018)Online publication date: 1-Jan-2025
https://doi.org/10.1109/JSEN.2024.3500576
Qian BGuo XBoateng GAn RLiu HLai ZChen C(2025)Magnetoquasistatic Positioning: Recent Advances, Applications, Potential Solutions, and Future ProspectsIEEE Internet of Things Journal10.1109/JIOT.2024.352108412:6(6250-6274)Online publication date: 15-Mar-2025
https://doi.org/10.1109/JIOT.2024.3521084
Huang KIravantchi YChen DSample A(2024)MagDesk: Interactive Tabletop Workspace Based on Passive Magnetic TrackingProceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies10.1145/36997568:4(1-31)Online publication date: 21-Nov-2024
https://dl.acm.org/doi/10.1145/3699756
Yu THu GZhang RLim HMahmud SLee CLi KAgarwal DNie SOh JGuimbretière FZhang C(2024)Ring-a-Pose: A Ring for Continuous Hand Pose TrackingProceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies10.1145/36997418:4(1-30)Online publication date: 21-Nov-2024
https://dl.acm.org/doi/10.1145/3699741
Narayanan Balaji AKimber CDu RKim D(2024)RetroSphere: Enabling Low-power and Affordable 3D Input for Lightweight Augmented Reality DevicesGetMobile: Mobile Computing and Communications10.1145/3686138.368614828:2(31-37)Online publication date: 31-Jul-2024
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Kim DWhitmire EBoldu RKienzle WBenko HKostakos VKay JHoang T(2024)SoundScroll: Robust Finger Slide Detection Using Friction Sound and Wrist-Worn MicrophonesProceedings of the 2024 ACM International Symposium on Wearable Computers10.1145/3675095.3676614(63-70)Online publication date: 5-Oct-2024
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Takahashi RWhitmire EBoldu RNg SKienzle WBenko H(2024)picoRing: battery-free rings for subtle thumb-to-index inputProceedings of the 37th Annual ACM Symposium on User Interface Software and Technology10.1145/3654777.3676365(1-11)Online publication date: 13-Oct-2024
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Zhao JPreechayasomboon PChristensen TMemar AShen ZColonnese NKhbeis MZhu M(2024)TouchpadAnyWear: Textile-Integrated Tactile Sensors for Multimodal High Spatial-Resolution Touch Inputs with Motion Artifacts ToleranceProceedings of the 37th Annual ACM Symposium on User Interface Software and Technology10.1145/3654777.3676344(1-14)Online publication date: 13-Oct-2024
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Chen DLuo QChen XWang XZhou C(2024)MagDotProceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies10.1145/36314237:4(1-25)Online publication date: 12-Jan-2024
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Wang XZhang Y(2024)TextureSightProceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies10.1145/36314137:4(1-27)Online publication date: 12-Jan-2024
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