RotoWrist: Continuous Infrared Wrist Angle Tracking using a Wristband
summary
Wristband with 8 time-of-flight IR sensors measures distances and a simple model maps weighted sensor deltas to two wrist angles, solved with Levenberg-Marquardt optimization learned from data. System claims no calibration across users and reports cross-user median error of 5.9° flexion/extension and 6.8° radial/ulnar, validated with OptiTrack on 15 participants. Prototype includes controller armband, drives a drawing app and a pointing demo fused with a Rift-S controller and shows practical, low-latency tracking.
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