profile

Jiaxi Jiang 蒋佳熹

PhD Student in Computer Science
ETH Zurich, Switzerland
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About Me

I am a final-year PhD candidate in Computer Science at the Sensing, Interaction & Perception Lab, ETH Zurich with Prof. Christian Holz. I've also recently completed my internship at Meta Reality Labs Research with Dr. Federica Bogo.

During my research journey, I was fortunate to collaborate with Larissa Laich and Dr. Patrick Snape from Meta Reality Labs, Zurich. Before starting my PhD, I got my Master’s degree in Computational Engineering Science (Specialized in Computer Vision and Robotics) from RWTH Aachen University, Germany. I wrote my Master’s thesis at the Computer Vision Lab, ETH Zurich, with Prof. Kai Zhang and Prof. Radu Timofte, supervised by Prof. Luc Van Gool and Prof. Bastian Leibe. Before that, I did a visiting research with Dr. Shuang Li and Prof. Jianwei Zhang at the University of Hamburg. Besides, I also worked with Dr. Jörg Stückler at Max Planck Institute for Intelligent Systems, and with Dr. Dengxin Dai at Max Planck Institute for Informatics.

I am currently on the job market for faculty, postdoc, or research scientist positions. Please feel free to reach out!

Research

My research focuses on scalable full-body human behavior learning through egocentric perception, to advance human motion modeling, embodied intelligence, and computational interaction. Specifically, I am interested in:

News

Publications (* supervised projects)

  • EgoExoMoCap: Distributed Ego-Exo Human Motion Capture
    Jiaxi Jiang, Bharat Lal Bhatnagar, Nan Yang, Lingni Ma, Sebastian Starke, Robin Kips, Nadine Bertsch, Christian Holz, Federica Bogo
    European Conference on Computer Vision (ECCV), 2026.
    Full-body motion capture in the wild from consumer smart glasses and optional wristbands — the first to jointly fuse egocentric and exocentric signals in a distributed framework. 

    @inproceedings{jiang2026egoexomocap,
  title={EgoExoMoCap: Distributed Human Motion Capture via Ego- and Exocentric Body Tracking from Head-Mounted Devices},
  author={Jiang, Jiaxi and Bhatnagar, Bharat Lal and Yang, Nan and Ma, Lingni and Starke, Sebastian and Kips, Robin and Bertsch, Nadine and Holz, Christian and Bogo, Federica},
  booktitle={European Conference on Computer Vision},
  year={2026},
  organization={Springer}
}

  • Group Inertial Poser: Multi-Person Pose and Global Translation from Sparse Inertial Sensors and Ultra-Wideband Ranging
    Ying Xue, Jiaxi Jiang*, Rayan Armani, Dominik Hollidt, Yi-Chi Liao, Christian Holz
    International Conference on Computer Vision (ICCV), 2025.
    Project Page Paper Poster Code Multi-person mocap from sparse IMUs was thought infeasible. Ultra-wideband ranging between wearers makes it work — anywhere, with no cameras. 

    @inproceedings{jiang2024egoposer,
title={EgoPoser: Robust real-time egocentric pose estimation from sparse and intermittent observations everywhere},
author={Jiang, Jiaxi and Streli, Paul and Meier, Manuel and Holz, Christian},
booktitle={European Conference on Computer Vision},
year={2024},
organization={Springer}
}

  • Garment Inertial Poser: Human Motion Capture from Loose and Sparse Inertial Sensors with Garment-aware Diffusion Models
    Andela Ilic, Jiaxi Jiang*, Paul Streli, Xintong Liu, Christian Holz
    International Joint Conferences on Artificial Intelligence (IJCAI), 2025.
    Project Page Paper Mocap escapes the lab and moves into real clothing: a diffusion model that knows how IMUs slide and swing with loose fabric. 

    @article{ilic2025human,
  title={Human Motion Capture from Loose and Sparse Inertial Sensors with Garment-aware Diffusion Models},
  author={Ilic, Andela and Jiang, Jiaxi and Streli, Paul and Liu, Xintong and Holz, Christian},
  journal={arXiv preprint arXiv:2506.15290},
  year={2025}
}

  • MANIKIN: Biomechanically Accurate Neural Inverse Kinematics for Human Motion Estimation
    Jiaxi Jiang, Paul Streli, Xuejing Luo, Christoph Gebhardt, Christian Holz
    European Conference on Computer Vision (ECCV), 2024.
    Project Page Paper Poster Biomechanics baked straight into a neural IK solver — anatomically plausible full-body pose from sparse sensors, with none of the bent-elbow contortions. 

    @inproceedings{jiang2024manikin,
  title={Manikin: Biomechanically accurate neural inverse kinematics for human motion estimation},
  author={Jiang, Jiaxi and Streli, Paul and Luo, Xuejing and Gebhardt, Christoph and Holz, Christian},
  booktitle={European Conference on Computer Vision},
  year={2024},
  organization={Springer}
}

  • EgoPoser: Robust Real-Time Egocentric Pose Estimation from Sparse and Intermittent Observations Everywhere
    Jiaxi Jiang, Paul Streli, Manuel Meier, Christian Holz
    European Conference on Computer Vision (ECCV), 2024.
    Project Page Paper Poster Code Real-time full-body pose from a head-mounted device — holding up when the hands leave its field of view, and working anywhere you walk. 

    @inproceedings{jiang2024egoposer,
title={EgoPoser: Robust real-time egocentric pose estimation from sparse and intermittent observations everywhere},
author={Jiang, Jiaxi and Streli, Paul and Meier, Manuel and Holz, Christian},
booktitle={European Conference on Computer Vision},
year={2024},
organization={Springer}
}

  • EgoSim: An Egocentric Multi-view Simulator and Real Dataset for Body-worn Cameras during Motion and Activity
    Dominik Hollidt, Paul Streli, Jiaxi Jiang*, Yasaman Haghighi, Changlin Qian, Xintong Liu, Christian Holz
    Neural Information Processing Systems (NeurIPS), 2024
    Project Page Paper Video Dataset Code A simulator and paired real-world dataset that finally expose egocentric vision to the blur, occlusion, and swing body-worn cameras actually endure. 

            @inproceedings{hollidtegosim,
          title={EgoSim: An Egocentric Multi-view Simulator and Real Dataset for Body-worn Cameras during Motion and Activity},
          author={Hollidt, Dominik and Streli, Paul and Jiang, Jiaxi and Haghighi, Yasaman and Qian, Changlin and Liu, Xintong and Holz, Christian},
          booktitle={The Thirty-eight Conference on Neural Information Processing Systems Datasets and Benchmarks Track}
        }

  • Ultra Inertial Poser: Scalable Motion Capture and Tracking from Sparse Inertial Sensors and Ultra-Wideband Ranging
    Rayan Armani, Changlin Qian, Jiaxi Jiang*, Christian Holz
    ACM SIGGRAPH 2024
    Project Page Paper Video Code Global drift has haunted sparse-IMU mocap for years. Ultra-wideband ranging between sensors anchors absolute position and limb geometry — camera-free, marker-free. 

    @article{armani2024ultra,
  title={Ultra Inertial Poser: Scalable Motion Capture and Tracking from Sparse Inertial Sensors and Ultra-Wideband Ranging},
  author={Armani, Rayan and Qian, Changlin and Jiang, Jiaxi and Holz, Christian},
  journal={arXiv preprint arXiv:2404.19541},
  year={2024}
}

  • Structured Light Speckle: Joint Ego-Centric Depth Estimation and Low-Latency Contact Detection via Remote Vibrometry
    Paul Streli, Jiaxi Jiang, Juliete Rossie, Christian Holz
    ACM Symposium on User Interface Software and Technology (UIST), 2023.
    Project Page Paper Video Talk A single camera reads dense depth and low-latency touch off any surface — by decoding the faint tremor of laser speckle. 

    @inproceedings{uist2023-structured_light_speckle,
  author = {Streli, Paul and Jiang, Jiaxi and Rossie, Juliete and Holz, Christian},
  title = {Structured Light Speckle: Joint Ego-Centric Depth Estimation and Low-Latency Contact Detection via Remote Vibrometry},
  year = {2023},
  isbn = {9798400701320},
  publisher = {Association for Computing Machinery},
  address = {New York, NY, USA},
  doi = {https://doi.org/10.1145/3586183.3606749},
  booktitle = {Proceedings of the 36th Annual ACM Symposium on User Interface Software and Technology},
  articleno = {26},
  numpages = {12}
                }

  • AvatarPoser: Articulated Full-Body Pose Tracking from Sparse Motion Sensing
    Jiaxi Jiang, Paul Streli, Huajian Qiu, Andreas Fender, Larissa Laich, Patrick Snape, Christian Holz
    European Conference on Computer Vision (ECCV), 2022.
    Project Page Paper Poster Video Code The first to bring legs to VR avatars — full-body motion inferred from headset and hand tracking that contains zero leg observations. 

    @inproceedings{jiang2022avatarposer,
  title={Avatarposer: Articulated full-body pose tracking from sparse motion sensing},
  author={Jiang, Jiaxi and Streli, Paul and Qiu, Huajian and Fender, Andreas and Laich, Larissa and Snape, Patrick and Holz, Christian},
  booktitle={European Conference on Computer Vision},
  pages={443--460},
  year={2022},
  organization={Springer}
}

  • TapType: Ten-Finger Text Entry on Everyday Surfaces via Bayesian Inference
    Paul Streli, Jiaxi Jiang, Manuel Meier, Hugo Romat, Andreas Fender, Christian Holz
    ACM CHI Conference on Human Factors in Computing Systems (CHI), 2022.
    Project Page Paper Video Demo Ten-finger typing on any flat surface — a table, a desk, a wall — wearing nothing but two wristbands. 

    @inproceedings{chi2022-taptype,
author = {Streli, Paul and Jiang, Jiaxi and Fender, Andreas and Meier, Manuel and Romat, Hugo and Holz, Christian},
title = {TapType: Ten-finger text entry on everyday surfaces via Bayesian inference},
year = {2022},
isbn = {9781450391573},
publisher = {Association for Computing Machinery},
address = {New York, NY, USA},
doi = {https://doi.org/10.1145/3491102.3501878},
booktitle = {Proceedings of the 2022 CHI Conference on Human Factors in Computing Systems},
numpages = {16}
}

  • Towards Flexible Blind JPEG Artifacts Removal
    Jiaxi Jiang, Kai Zhang, Radu Timofte
    International Conference on Computer Vision (ICCV), 2021.
    Paper Poster Code Master Thesis Blind JPEG artifact removal with a dial: trade detail against smoothness at inference time, with no retraining and no per-quality model. 

    @inproceedings{jiang2021towards,
title={Towards Flexible Blind JPEG Artifacts Removal},
author={Jiang, Jiaxi and Zhang, Kai and Timofte, Radu},
booktitle={Proceedings of the IEEE/CVF International Conference on Computer Vision},
pages={4997--5006},
year={2021}
}

  • A Mobile Robot Hand-Arm Teleoperation System by Vision and IMU
    Shuang Li, Jiaxi Jiang, Philipp Ruppel, Hongzhuo Liang, Xiaojian Ma, Norman Hendrich, Fuchun Sun, Jianwei Zhang
    International Conference on Intelligent Robots and Systems (IROS), 2020.
    Project Page Paper Video Code Drive a dexterous mobile manipulator in real time with only a low-cost depth camera (hand pose) and a wearable IMU device (arm pose) — no optical mocap rig. 

    @inproceedings{li2020mobile,
title={A mobile robot hand-arm teleoperation system by vision and imu},
author={Li, Shuang and Jiang, Jiaxi and Ruppel, Philipp and Liang, Hongzhuo and Ma, Xiaojian and Hendrich, Norman and Sun, Fuchun and Zhang, Jianwei},
booktitle={2020 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS)},
pages={10900--10906},
year={2020},
organization={IEEE}
}

    • Academic Services

    Reviewers

    Computer Vision: CVPR, ICCV, ECCV, TIP
    Computer Graphics: SIGGRAPH, SIGGRAPH Asia, ToG
    Machine Learning: NeurIPS, ICLR, ICML, AAAI
    Human-Computer Interaction: CHI, UIST, IEEE VR

    Teaching

    Egocentric Computer Vision: Perception and Understanding from the First-Person View, ETH Zurich, Spring 2026
    Artificial Intelligence for Digital Characters, ETH Zurich, Spring 2025, Spring 2026
    Egocentric Perception for Human-World Understanding, ETH Zurich, Spring 2025
    Computer Science I, ETH Zurich, Autumn 2024
    Stochastics and Machine Learning, ETH Zurich, Spring 2024
    Mixed Reality, ETH Zurich, Autumn 2023
    Big Data For Engineers, ETH Zurich, Spring 2023

    Supervised Students

    Qi Ma, Master Thesis, MSc in CS, ETH Zurich, 11.2025 - Present
    Liuxin Qing, Semester & Master Thesis, MSc in EE, ETH Zurich, 10.2024 - 02.2026, now Software Engineer at Neura Robotics
    Nicola Witzig, Bachelor Thesis, BSc in CS, ETH Zurich, 03.2025 - 09.2025
    Shuyue Wang, Master Thesis, MSc in CS, ETH Zurich, 04.2024 - 03.2025
    Chang-Jin Lee, Bachelor Thesis, BSc in CS, ETH Zurich, 04.2024 - 10.2024
    Andela Ilic, Master Thesis, MSc in EE, ETH Zurich, 04.2024 - 10.2024, now PhD Student at ETH Zurich
    Ying Xue, Master Thesis, Research Intern, MSc in CS, ETH Zurich, 01.2024 - 05.2025, now PhD Student at ETH Zurich
    Changlin Qian, Research Intern, MSc in Robotics, ETH Zurich, 09.2023 - 07.2024, now Software Engineer at Meta
    Rayan Armani, Research Assistant, MSc in Robotics, ETH Zurich, 2023.09 - 03.2024, now Software Engineer at Apple
    Yasaman Haghighi, Research Intern, MSc in EE, EPFL, 2023.07 - 2024.01, now PhD Student at EPFL
    Xuejing Luo, Master Thesis, MSc in Robotics, ETH Zurich, 05.2023 - 02.2024, now PhD Student at Aalto University
    Xintong Liu, Master Thesis, MSc in Robotics, ETH Zurich, 03.2023 - 03.2024
    Filip Stanisic, Semester Thesis, MSc in EE, ETH Zurich, 03.2023 - 07.2023
    Huajian Qiu, Master Thesis, MSc in CSE, EPFL, 2021.10-2022.01, now PhD Student at Unviersity of Stuttgart

               
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