MagShield: Towards Better Robustness in Sparse Inertial Motion Capture Under Magnetic Disturbances
This addresses a practical limitation for users of inertial motion capture in real-world scenarios, but it is incremental as it builds on existing systems.
The paper tackled the problem of magnetic interference causing orientation errors in sparse inertial motion capture systems, and the result was that MagShield significantly enhanced accuracy under such disturbances with good compatibility across systems.
This paper proposes a novel method called MagShield, designed to address the issue of magnetic interference in sparse inertial motion capture (MoCap) systems. Existing Inertial Measurement Unit (IMU) systems are prone to orientation estimation errors in magnetically disturbed environments, limiting their practical application in real-world scenarios. To address this problem, MagShield employs a "detect-then-correct" strategy, first detecting magnetic disturbances through multi-IMU joint analysis, and then correcting orientation errors using human motion priors. MagShield can be integrated with most existing sparse inertial MoCap systems, improving their performance in magnetically disturbed environments. Experimental results demonstrate that MagShield significantly enhances the accuracy of motion capture under magnetic interference and exhibits good compatibility across different sparse inertial MoCap systems.