Di (Kilian) Chang 常迪 CS Ph.D. @ University of Southern California Student Researcher @ TikTok - Seed Vision Research Department of Computer Science Viterbi School of Engineering University of Southern California Email1: dichang at usc dot edu (primary) Email2: dchang at ict dot usc dot edu     [News] [Education] [Publications] [Experience]

About Me

I am a first-year second-year third-year Ph.D. student in the Department of Computer Science at University of Southern California (USC) with Prof. Mohammad Soleymani of IHP-Lab. I'm also a student researcher at TikTok-ByteDance Seed Vision Research, working with Dr. Yichun Shi and Dr. Peng Wang. During my PhD at USC, I'm fortunate to have collaborated with Prof. Gordon Wetzstein from Stanford University, Prof. Narendra Ahuja from University of Illinois Urbana-Champaign, and their students. I was a Research Scientist Intern at TikTok-ByteDance Intelligent Creation Lab, working with Dr. Hongyi Xu and Dr. Linjie Luo during 2024 summer, and with Dr. Yichun Shi and Dr. Xiao Yang during 2023 summer.

• Multi-View Geometry and Dynamic 3D Generation.
• Image and Video Generation with Diffusion Models.
• Facial Expression Analysis and Affective Computing.

Research opportunities:
For USC undergraduate students: We have openings for interns through CURVE program. Usually we recruit students (first-time researchers and continuing researchers) during Fall and Spring semesters, please apply early.

For USC master students: Please directly email Prof. Mohammad Soleymani for such inquiries. It would be better if you've attended CSCI 535 and obtained a good grade.

For all other students outside USC: we usually don't have openings during Fall and Spring semesters, but Prof. Mohammad Soleymani sometimes recruits good candidates (Undergrad/Ms/visiting PhD) during the Summer. Email him for further details.

I am happy to collaborate and/or answer questions about my research and my previous study at TUM and current PhD program at USC. If you are interested in research collaboration or have any inquiries about my experience, please send me an email.

News

[2025/02/26] Our X-Dyna has been accepted by CVPR 2025! See you in Nashville!

[2024/12/02] I will join Meta Reality Lab in San Francisco, CA as a Research Scientist Intern during 2025 Summer.

[2024/11/27] Joined Seed Vision Research at TikTok as a student researcher. Excited to work with my previous mentor Dr. Yichun Shi.

[2024/07/01] Our Dyadic-Interaction-Modeling has been accepted by ECCV 2024! See you in Milan, Italy!

[2024/05/20] Start my Summer Internship at TikTok (San Jose Office in CA). Excited to return to my previous team and work with Dr. Hongyi Xu.

[2024/05/01] Our MagicPose has been accepted by ICML 2024! See you in Vienna, Austria!

[2024/02/26] Our DiffPortrait3D has been accepted by CVPR 2024! See you in Seattle!

[2023/08/14] Our FG-Net and LibreFace has been accepted by WACV 2024! Find me at Waikoloa, Hawaii.

[2023/05/22] Start my Summer Internship at TikTok (San Jose Office in CA). Looking forward to building connections with talents in the Bay Area!

[2022/08/19] Today I start my Ph.D. at USC Viterbi Computer Science! Fight on, Trojans!

[2022/07/04] My first single-first-author paper RC-MVSNet has been accepted by ECCV 2022! See you in Tel Aviv!

[2022/04/08] I'm joining IHP-Lab at USC as a PhD student, see you in Los Angeles!

[2022/03/15] Our GBi-Net has been accepted by CVPR 2022!

[2022/03/07] I will join 3D AI Lab at Technische Universität München as a guided research student with Professor Angela Dai.

[2022/01/15] I will join Image and Visual Representation Lab at École Polytechnique Fédérale de Lausanne as a research intern/visiting researcher.

[2021/10/15] I will join Visual Computing & Artificial Intelligence Lab at Technische Universität München with Professor Matthias Niessner.

[2021/03/04] I will join Prof.Xu’s vision group at HKUST as a research intern during summer 2021.

Talks

EPFL School of Computer and Communication Sciences - 09/26/2024 Title: Human-Centric Generative Vision Models.       Slides: Here. Hosted by: Image and Visual Representation Lab and Computer Vision Lab.

Preprints

	DiTaiListener: Controllable High Fidelity Listener Video Generation with Diffusion Masksim Siniukov*, Di Chang*, Minh Tran, Hongkun Gong, Ashutosh Chaubey, Mohammad Soleymani (*equal contribution) Arxiv Preprint [paper]
	X-Dancer: Expressive Music to Human Dance Video Generation Zeyuan Chen, Hongyi Xu, Guoxian Song, You Xie, Chenxu Zhang, Xin Chen, Chao Wang, Di Chang, Linjie Luo Arxiv Preprint [paper]
	MagicPose4D: Crafting Articulated Models with Appearance and Motion Control Hao Zhang*, Di Chang*, Fang Li, Mohammad Soleymani†, Narendra Ahuja† (*equal contribution   † equal advise) Arxiv Preprint [project page] [paper] [code]
	Learning-based Multi-View Stereo: A Survey Fangjihua Wang*†, Qingtian Zhu*, Di Chang*, Quankai Gao, Junlin Han, Tong Zhang, Richard Hartley, Marc Pollefeys (*equal contribution   †project lead) Arxiv Preprint [paper]

Selected Publications [Google Scholar]

	X-Dyna: Expressive Dynamic Human Image Animation Di Chang, Hongyi Xu*, You Xie*, Yipeng Gao*, Zhengfei Kuang*, Shengqu Cai*, Chenxu Zhang*, Guoxian Song, Chao Wang, Yichun Shi, Zeyuan Chen, Shijie Zhou, Linjie Luo, Gordon Wetzstein, Mohammad Soleymani, (*equal contribution as second authors) IEEE/CVF Computer Vision and Pattern Recognition Conference (CVPR), 2025. [project page] [paper] [code]
	DIM: Dyadic Interaction Modeling for Social Behavior Generation Minh Tran*, Di Chang*, Maksim Siniukov, Mohammad Soleymani (*equal contribution) European Conference on Computer Vision (ECCV), 2024. [project page] [paper] [code]
	MagicPose: Realistic Human Poses and Facial Expressions Retargeting with Identity-aware Diffusion. Di Chang, Yichun Shi, Quankai Gao, Jessica Fu, Hongyi Xu, Guoxian Song, Qing Yan, Yizhe Zhu, Xiao Yang, Mohammad Soleymani International Conference on Machine Learning (ICML), 2024. [project page] [paper] [code] [video]
	DiffPortrait3D: Controllable Diffusion for Zero-Shot Portrait View Synthesis Yuming Gu, Xie You, Hongyi Xu, Guoxian Song, Yichun Shi, Di Chang, Jing Yang, Linjie Luo IEEE/ CVF International Conference on Computer Vision and Pattern Recognition (CVPR), 2024. (Highlight) [project page] [paper] [code] [video]
	LibreFace: An Open-Source Toolkit for Deep Facial Expression Analysis Di Chang, Yufeng Yin, Zongjian Li, Minh Tran, and Mohammad Soleymani IEEE/CVF Winter Conference on Applications of Computer Vision (WACV), 2024. (Application Track) [project page] [paper] [code] [video]
	RC-MVSNet: Unsupervised Multi-View Stereo with Neural Rendering Di Chang, Aljaž Božic, Tong Zhang, Qingsong Yan, Yingcong Chen, Sabine Süsstrunk and Matthias Nießner European Conference on Computer Vision (ECCV), 2022. [project page] [paper] [code] [video]

Education

University of Southern California, Los Angeles, USA (Aug. 2022 - Present) Doctor of Philosophy in Computer Science Major Orientation: Deep Learning for 3D Vision and Affective Computing

Technical University of Munich, Munich, Germany (Aug. 2021 - Jul. 2022) Bachelor of Science in Informatics Major Orientation: Deep Learning for 3D Perception, 3D Scanning and Spatial Learning Overall GPA: 1.2/1.0 Bachelor thesis: "Supervised and Unsupervised Multi View Stereo for Depth Inference"

Dalian University of Technology, Dalian, China (Sep. 2018 - Jul. 2021) Bachelor of Engineering in Eletronic Information Engineering Major Orientation: Object Detection and Tracking Overall GPA: 91.5/100 | 3.93/4.0

Intern & Work Experience

TikTok, Los Angeles, CA, USA (Dec. 2024 - Current) Position: Student Researcher at Seed Vision Research Supervisor: Dr. Yichun Shi , and Dr. Peng Wang Project: Foundation Models for Text-guided Image Editing and Stylization

TikTok, San Jose, CA, USA (May. 2024 - Nov. 2024) Position: Research Scientist Intern at ByteDance Intelligent Creation Lab Supervisor: Dr. Hongyi Xu , Dr. Yichun Shi , Dr. Guoxian Song , and Dr. Linjie Luo Project: Dynamic Human Video Generation with Diffusion Models

TikTok, San Jose, CA, USA (May. 2023 - Nov. 2023) Position: Research Scientist Intern at ByteDance Intelligent Creation Lab Supervisor: Dr. Yichun Shi , Dr. Guoxian Song , Dr. Hongyi Xu , and Dr. Xiao Yang Project: Human Video Animation with Diffusion Models

EPFL, Lausanne, Switzerland (Jul. 2022 - Oct. 2022) Position: Summer@EPFL (Top 2% from the candidates in the world) hired by IVRL Supervisor: Dr. Tong Zhang and Prof. Sabine Süsstrunk Project: Video Synthesis with Diffusion Models

TUM, Munich, Bayern, Germany (Aug. 2021 - Mar. 2022) Position: Research Praktikum in Visual Computing Group Supervisor: Prof. Matthias Niessner and M.Sc Aljaž Božič Project: Unsupervised Multi-View Stereo

HKUST, Hong Kong, China (Mar. 2021 - Sep. 2021) Position: Research Intern in HKUST Vision Group (MM-Lab at HKUST) Supervisor: Prof. Dan Xu and M.Sc Zhenxing Mi Project: Multi View Stereo Depth Estimation

Students

• Jessica Fu. (Undergraduate student at USC, recruited through CURVE Fellowship. 2023 Fall, 2024 Spring)
• Kevin Hopkins. (Master student at USC. 2023 Fall, 2024 Spring)
• Ellie Xing. (Undergraduate student at USC, recruited through CURVE Fellowship. 2024 Spring)
• Hongkun Gong. (Undergraduate student at USC. 2024 Spring)

Academic Service

Teaching

• Graduate Teaching Assistant, CSCI 103 Introduction to Programming - 2022 Fall
• Graduate Teaching Assistant, CSCI 535 Multimodal Probabilistic Learning of Human Communication - 2024 Spring

Miscellaneous

• (8 yrs +) 🎮Video Games, I am a lover of League of Legends, highest rank: Platinum II of EU server S12.
• (2 yr +) 🏁Car Racing, I love racing with my Chevy Camaro SS (It's an aftermarket upgraded V8!). I've been to Sonoma Raceway, Laguna Seca Raceway, Buttton Willow Raceway in California, USA and Nürburgring Nordschleife Track in Rhineland-Palatinate, Germany.    My Camaro 👇 :D

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Last update: Mar. 10, 2025