Prof. Dr. Siyu Tang

Assistant Professor of Computer Science, CNB G 104
+41 44 633 38 94

Basic Information

I’m a tenure-track assistant professor in the Department of Computer Science at ETH Zürich. I lead the Computer Vision and Learning Group (VLG) at the Institute of Visual Computing. Before joining ETH, I received an early career research grant to start my research group at the Max Planck Institute for Intelligent Systems in November 2017. I was a postdoctoral researcher in the same institute, advised by Dr. Michael Black. I obtained my PhD at the Max Planck Institute for Informatics in 2017, under the supervision of Professor Bernt Schiele. Before that, I received my Master’s degree in Media Informatics at RWTH Aachen University and my Bachelor’s degree in Computer Science at Zhejiang University, China. 

My research focuses on computer vision and machine learning, specializing in perceiving and modeling humans. In my group, we study computational models that enable machines to perceive and analyze human pose, motion, and activities from visual input. We leverage machine learning and optimization techniques to build statistical models of humans and their behaviors. Our goal is to advance algorithmic foundations of scalable and reliable human digitalization, enabling a broad class of real-world applications.


Professional Activities

  • Technical Papers Committee, SIGGRAPH 2022

  • Area Chairs: CVPR 2020, 2021, 2022. ECCV 2022. ICCV 2021

  • Tutorial Chairs: CVPR 2023. ACCV 2020

  • Workshop Organization: ECCV 2022 EgoBody Benchmark


Honors and Awards

  • Best Paper Award Finalist, CVPR 2022

  • Best Paper Award Finalist, CVPR 2021

  • Best Paper Award, 3DV 2020

  • ELLIS Ph.D. Award 2019

  • DAGM MVTec Dissertation Award 2018

  • Best Paper Award, BMVC 2012



  • Innosuisse Flagship Project. 

    The Data-​driven Transformation of Surgical Training for Proficiency-​based Performance

  • SNSF Grant.

    Learning to Create Realistic Human Avatars

  • Microsoft Research Grant.

    First-​Person-View Social Interaction Capture for Mixed Reality 

  • ETH Post-​doctoral Fellowship (Sergey Prokudin)

    Robust and Controllable Neural Avatars

  • FIFA Sponsored Research Agreement

  • Facebook Research Gift



  • Installation “Flight Assembled Architecture Revisited-Inhabiting the Virtual" at the Guggenheim Bilbao Museum.

    In collaboration with Gramazio Kohler Research, ETH Zurich. 08.04.2022 - 18.09.2022.


Keynote Talks

  • CVMP 2021  

    Learning to capture and synthesize 3D humans in 3D scenes.

  • Amazon’s Computer Vision Conference 2021

    Animatable Neural Bodies and Hands


Invited Talks

  • CVPR 2022 workshop: Computer Vision in the Built Environment
    Inhabiting a Virtual City

  • 19th Conference on Robots and Vision 2022
    Inhabiting a Virtual City

  • ETH Robotics Innovation Day 2022
    Human Motion Capture and Synthesis

  • ETH AI+Art Conversation 2022
    Human Motion Capture and Synthesis

  • Baidu  2022
    Inhabiting the Virtual

  • AI4AEC Colloquium  2021
    Learning to Capture and Synthesize 3D Humans in 3D Scenes

  • SoMoF ICCV Workshop  2021
    Animatable Neural Bodies and Hands

  • Digital Festival Zurich  2021

  • Google  2021
    Capture and Synthesis of 3D Humans in 3D Scenes

  • ETH Zurich Design++ Opening Event 2021
    Capture and Synthesis of 3D Humans in 3D Scenes

  • Disney Research, Zurich 2021
    Animatable Neural Bodies and Hands

  • Facebook, Zurich 2021
    Animatable Neural Bodies and Hands

  • ELLIS Computer Vision and Pattern Recognition Workshop 2021 

  • 3DGV 2021
    Generating People Interacting with 3D Scenes and Objects

  • ETH AI+X Series Future of Retail 2021

  • ETH Zurich Industrial Day 2020
    Learning to See and Generate People

  • GCPR 2020
    Generating People Interacting with 3D Scenes and Objects



Authors:Shaofei Wang,  Katja Schwarz,  Andreas Geiger,  Siyu Tang

Given sparse multi-view videos, ARAH learns animatable clothed human avatars that have detailed pose-dependent geometry/appearance and generalize to out-of-distribution poses.

Authors:Kaifeng Zhao,  Shaofei Wang,  Yan Zhang,  Thabo Beeler,  Siyu Tang

Synthesizing natural interactions between virtual humans and their 3D environments is critical for numerous applications, such as computer games and AR/VR experiences. We propose COINS, for COmpositional INteraction Synthesis with Semantic Control.

Authors:Siwei ZhangQianli MaYan ZhangZhiyin QianTaein KwonMarc PollefeysFederica Bogo and Siyu Tang

A large-scale dataset of accurate 3D human body shape, pose and motion of humans interacting in 3D scenes, with multi-modal streams from third-person and egocentric views, captured by Azure Kinects and a HoloLens2.

Authors:Yan Wu*Jiahao Wang*Yan ZhangSiwei ZhangOtmar HilligesFisher Yu and Siyu Tang
(* denotes equal contribution)

Our goal is to synthesize whole-body grasping motion. Given a 3D object, we aim to generate diverse and natural whole-body human motions that approach and grasp the object.

Authors:Marko Mihajlovic , Shunsuke Saito , Aayush Bansal , Michael Zollhoefer  and Siyu Tang

COAP is a novel neural implicit representation for articulated human bodies that provides an efficient mechanism for modeling self-contacts and interactions with 3D environments.

Authors:Yan Zhang, and Siyu Tang

We propose GAMMA, an automatic and scalable solution, to populate the 3D scene with diverse digital humans. The digital humans have 1) varied body shapes, 2) realistic and perpetual motions to reach goals, and 3) plausible body-ground contact.

Authors:Hongwei YiChun-Hao Paul HuangDimitrios TzionasMuhammed KocabasMohamed HassanSiyu TangJustus ThiesMichael Black

Humans are in constant contact with the world as they move through it and interact with it. This contact is a vital source of information for understanding 3D humans, 3D scenes, and the interactions between them.

Authors:Taein KwonBugra TekinSiyu TangMarc Pollefeys

Temporal alignment of fine-grained human actions in videos is important for numerous applications in computer vision, robotics, and mixed reality.

Authors:Vassilis Choutas,  Lea Müller,  Chun-Hao Paul Huang,  Siyu Tang,  Dimitrios Tzionas,  Michael Black

We exploit the anthropometric measurements and linguistic shape attributes in several novel ways to train a neural network, called SHAPY, that regresses 3D human pose and shape from an RGB image.

Authors:Shaofei Wang, Marko Mihajlovic, Qianli Ma, Andreas Geiger, Siyu Tang

MetaAvatar is meta-learned model that represents generalizable and controllable neural signed distance fields (SDFs) for clothed humans. It can be fast fine-tuned to represent unseen subjects given as few as 8 monocular depth images.

Authors:Zicong FanAdrian SpurrMuhammed KocabasSiyu TangMichael J. Black and Otmar Hilliges

In this paper we demonstrate that self-similarity, and the resulting ambiguities in assigning pixel observations to the respective hands and their parts, is a major cause of the final 3D pose error. Motivated by this insight, we propose DIGIT, a novel method for estimating the 3D poses of two interacting hands from a single monocular image.

Authors:Miao Liu, Dexin Yang, Yan ZhangZhaopeng CuiJames M. RehgSiyu Tang

We seek to reconstruct 4D second-person human body meshes that are grounded on the 3D scene captured in an egocentric view. Our method exploits 2D observations from the entire video sequence and the 3D scene context to optimize human body models over time, and thereby leads to more accurate human motion capture and more realistic human-scene interaction.

Authors:Korrawe KarunratanakulAdrian SpurrZicong FanOtmar HilligesSiyu Tang

We present HALO, a neural occupancy representation for articulated hands that produce implicit hand surfaces from input skeletons in a differentiable manner.

Authors:Qianli Ma, Jinlong Yang, Siyu Tang and Michael J. Black

We introduce POP — a point-based, unified model for multiple subjects and outfits that can turn a single, static 3D scan into an animatable avatar with natural pose-dependent clothing deformations.

Authors:Siwei Zhang, Yan Zhang, Federica Bogo, Marc Pollefeys and Siyu Tang

LEMO learns motion priors from a larger scale mocap dataset and proposes a multi-​stage optimization pipeline to enable 3D motion reconstruction in complex 3D scenes.

Authors:Lea MüllerAhmed A. A. OsmanSiyu TangChun-Hao P. Huang and Michael J. Black

we develop new datasets and methods that significantly improve human pose estimation with self-contact.

Authors:Yan Zhang, Michael J. Black and Siyu Tang

"We are more than our joints", or MOJO for short, is a solution to stochastic motion prediction of expressive 3D bodies. Given a short motion from the past, MOJO generates diverse plausible motions in the near future.

Authors:Marko Mihajlovic, Yan Zhang, Michael J. Black and Siyu Tang

LEAP is a neural network architecture for representing volumetric animatable human bodies. It follows traditional human body modeling techniques and leverages a statistical human prior to generalize to unseen humans.

Authors:Shaofei Wang, Andreas Geiger and Siyu Tang

Registering point clouds of dressed humans to parametric human models is a challenging task in computer vision. We propose novel piecewise transformation fields (PTF), a set of functions that learn 3D translation vectors which facilitates occupancy learning, joint-​rotation estimation and mesh registration.

Authors:Qianli MaShunsuke SaitoJinlong Yang, Siyu Tang and Michael J. Black

SCALE models 3D clothed humans with hundreds of articulated surface elements, resulting in avatars with realistic clothing that deforms naturally even in the presence of topological change.

Authors:Korrawe Karunratanakul, Jinlong Yang, Yan Zhang, Michael Black, Krikamol Muandet, Siyu Tang

Capturing and synthesizing hand-​object interaction is essential for understanding human behaviours, and is key to a number of applications including VR/AR, robotics and human-​computer interaction.

Authors:Siwei Zhang, Yan Zhang, Qianli MaMichael J. Black, Siyu Tang

Automated synthesis of realistic humans posed naturally in a 3D scene is essential for many applications. In this paper we propose explicit representations for the 3D scene and the person-​scene contact relation in a coherent manner.

Authors:Yan Zhang, Michael J. Black, Siyu Tang

In this work, our goal is to generate significantly longer, or “perpetual”, motion: given a short motion sequence or even a static body pose, the goal is to generate non-​deterministic ever-​changing human motions in the future.

Authors:Miao Liu, Siyu Tang, Yin Li, and James M. Rehg

We address the challenging task of anticipating human-​object interaction in first person videos. We adopt intentional hand movement as a future representation and propose a novel deep network that jointly models and predicts the egocentric hand motion, interaction hotspots and future action.

Authors:Xucong Zhang, Seonwook Park, Thabo Beeler, Derek Bradley, Siyu Tang , Otmar Hilliges

We propose the ETH-​XGaze dataset: a large scale (over 1 million samples) gaze estimation dataset with high-​resolution images under extreme head poses and gaze directions.

Authors:Yan Zhang, Mohamed Hassan, Heiko Neumann, Michael J. Black, Siyu Tang

We present a fully-​automatic system that takes a 3D scene and generates plausible 3D human bodies that are posed naturally in that 3D scene.

Authors:Qianli Ma, Jinlong Yang, Anurag Ranjan, Sergi Pujades, Gerard Pons-​Moll, Siyu Tang, and Michael J. Black

CAPE is a Graph-CNN based generative model for dressing 3D meshes of human body. It is compatible with the popular body model, SMPL, and can generalize to diverse body shapes and body poses. The CAPE Dataset provides SMPL mesh registration of 4D scans of people in clothing, along with registered scans of the ground truth body shapes under clothing.

Authors:Anurag Ranjan, David T. Hoffmann, Dimitrios Tzionas, Siyu Tang, Javier Romero, Michael J. Black

We created an extensive Human Optical Flow dataset containing images of realistic human shapes in motion together with ground truth optical flow. We then train two compact network architectures based on spatial pyramids, namely SpyNet and PWC-​Net.

Authors:Jie SongBjoern AndresMichael J. BlackOtmar Hilliges, Siyu Tang

We propose an end-​to-end trainable framework to learn feature representations globally in a graph decomposition problem.