Pantœnna: Mouth Pose Estimation for VR/AR Headsets Using Low-Profile Antenna and Impedance Characteristic Sensing
Methods for faithfully capturing a user's holistic pose have immediate uses in AR/VR, ranging from multimodal input to expressive avatars. Although body-tracking has received the most attention, the mouth is also of particular importance, given that it is the channel for both speech and facial expression. In this work, we describe a new RF-based approach for capturing mouth pose using an antenna integrated into the underside of a VR/AR headset. Our approach side-steps privacy issues inherent in camera-based methods, while simultaneously supporting silent facial expressions that audio-based methods cannot. Further, compared to bio-sensing methods such as EMG and EIT, our method requires no contact with the wearer's body and can be fully self-contained in the headset, offering a high degree of physical robustness and user practicality. We detail our implementation along with results from two user studies, which show a mean 3D error of 2.6 mm for 11 mouth keypoints across worn sessions without re-calibration.
Research Team: Daehwa Kim, Chris Harrison
Daehwa Kim and Chris Harrison. 2023. Pantœnna: Mouth pose estimation for AR/VR headsets using low-profile antenna and impedance characteristic sensing. In Proceedings of the 36th Annual ACM Symposium on User Interface Software and Technology (UIST '23). Association for Computing Machinery, New York, NY, USA, Article 83, 1–12. https://doi.org/10.1145/3586183.3606805