Dr. Huidong Bai is a Research Fellow at the Empathic Computing Laboratory (ECL) established within the Auckland Bioengineering Institute (ABI, University of Auckland). His areas of research include exploring remote collaborative Mixed Reality (MR) interfaces with spatial scene reconstruction and segmentation, as well as integrating empathic sensing and computing into the collaboration system to enhance shared communication cues.
Before joining the ECL, he was a Postdoctoral Fellow at the Human Interface Technology Laboratory New Zealand (HIT Lab NZ, University of Canterbury), and focused on multimodal natural interaction for mobile and wearable Augmented Reality (AR).
Dr. Bai received his Ph.D. from the HIT Lab NZ in 2016, supervised by Prof. Mark Billinghurst and Prof. Ramakrishnan Mukundan. During his Ph.D., he was also a software engineer intern in the Vuforia team at Qualcomm in 2013 for developing a mobile AR teleconferencing system, and has been an engineering director in a start-up, Envisage AR since 2015 for developing industrial MR/AR applications.
Virtual Reality (VR) Head-Mounted Display (HMD) technology immerses a user in a computer generated virtual environment. However, a VR HMD also blocks the users’ view of their physical surroundings, and so prevents them from using their mobile phones in a natural manner. In this project, we present a novel Augmented Virtuality (AV) interface that enables people to naturally interact with a mobile phone in real time in a virtual environment. The system allows the user to wear a VR HMD while seeing his/her 3D hands captured by a depth sensor and rendered in different styles, and enables the user to operate a virtual mobile phone aligned with their real phone.
Gao, L., Bai, H., He, W., Billinghurst, M., & Lindeman, R. W. (2018, December). Real-time visual representations for mobile mixed reality remote collaboration. In SIGGRAPH Asia 2018 Virtual & Augmented Reality (p. 15). ACM.
Nassani, A., Bai, H., Lee, G., Langlotz, T., Billinghurst, M., & Lindeman, R. W. (2018, October). Filtering 3D Shared Surrounding Environments by Social Proximity in AR. In 2018 IEEE International Symposium on Mixed and Augmented Reality Adjunct (ISMAR-Adjunct) (pp. 123-124). IEEE.
Gao, L., Bai, H., Lindeman, R., & Billinghurst, M. (2017, November). Static local environment capturing and sharing for MR remote collaboration. In SIGGRAPH Asia 2017 Mobile Graphics & Interactive Applications (p. 17). ACM.
Huidong Bai, Prasanth Sasikumar, Jing Yang, and Mark Billinghurst. 2020. A User Study on Mixed Reality Remote Collaboration with Eye Gaze and Hand Gesture Sharing. In Proceedings of the 2020 CHI Conference on Human Factors in Computing Systems (CHI ’20). Association for Computing Machinery, New York, NY, USA, 1–13. DOI:https://doi.org/10.1145/3313831.3376550
L. Wang, Z. Zhao, X. Yang, H. Bai, A. Barde and M. Billinghurst, "A Constrained Path Redirection for Passive Haptics," 2020 IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and Workshops (VRW), Atlanta, GA, USA, 2020, pp. 651-652, doi: 10.1109/VRW50115.2020.00176.
Bai, H., Zhang, L., Yang, J., & Billinghurst, M. (2021). Bringing full-featured mobile phone interaction into virtual reality. Computers & Graphics, 97, 42-53.
Virtual Reality (VR) Head-Mounted Display (HMD) technology immerses a user in a computer generated virtual environment. However, a VR HMD also blocks the users’ view of their physical surroundings, and so prevents them from using their mobile phones in a natural manner. In this paper, we present a novel Augmented Virtuality (AV) interface that enables people to naturally interact with a mobile phone in real time in a virtual environment. The system allows the user to wear a VR HMD while seeing his/her 3D hands captured by a depth sensor and rendered in different styles, and enables the user to operate a virtual mobile phone aligned with their real phone. We conducted a formal user study to compare the AV interface with physical touch interaction on user experience in five mobile applications. Participants reported that our system brought the real mobile phone into the virtual world. Unfortunately, the experiment results indicated that using a phone with our AV interfaces in VR was more difficult than the regular smartphone touch interaction, with increased workload and lower system usability, especially for a typing task. We ran a follow-up study to compare different hand visualizations for text typing using the AV interface. Participants felt that a skin-colored hand visualization method provided better usability and immersiveness than other hand rendering styles.
Gunn, M., Billinghurst, M., Bai, H., & Sasikumar, P. (2021). First Contact‐Take 2: Using XR technology as a bridge between Māori, Pākehā and people from other cultures in Aotearoa, New Zealand. Virtual Creativity, 11(1), 67-90.
Nassani, A., Zhang, L., Bai, H., & Billinghurst, M. (2021, May). ShowMeAround: Giving Virtual Tours Using Live 360 Video. In Extended Abstracts of the 2021 CHI Conference on Human Factors in Computing Systems (pp. 1-4).
Sasikumar, P., Collins, M., Bai, H., & Billinghurst, M. (2021, May). XRTB: A Cross Reality Teleconference Bridge to incorporate 3D interactivity to 2D Teleconferencing. In Extended Abstracts of the 2021 CHI Conference on Human Factors in Computing Systems (pp. 1-4).
Zhang, L., He, W., Cao, Z., Wang, S., Bai, H., & Billinghurst, M. (2022). HapticProxy: Providing Positional Vibrotactile Feedback on a Physical Proxy for Virtual-Real Interaction in Augmented Reality. International Journal of Human–Computer Interaction, 1-15.
Zou, Q., Bai, H., Gao, L., Fowler, A., & Billinghurst, M. (2022, March). Asymmetric interfaces with stylus and gesture for VR sketching. In 2022 IEEE Conference on Virtual Reality and 3D User Interfaces Abstracts and Workshops (VRW) (pp. 968-969). IEEE.