Di (Kilian) Chang 常迪 CS Ph.D. @ University of Southern California 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 Email3: di dot chang at bytedance dot com     [News] [Education] [Publications] [Experience]

About Me

I am a first-year second-year Ph.D. student in the Department of Computer Science at University of Southern California (USC) with Prof. Mohammad Soleymani of IHP-Lab. I also collaborate with Prof. Yue Wang and his PhD students for some research projects. I was a Research Scientist Intern at TikTok-ByteDance AI Lab US, Intelligent Creation Team, working with Dr. Yichun Shi and Dr. Xiao Yang during 2023 summer.

• 3D Vision, especially Multi-View Geometry and Scene Reconstruction with Deep Learning approaches.
• Video Generation and View Synthesis with Generative Models(DDPM).
• Multimodal Machine Learning.
• 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

[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.

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

Preprints

	DIM: Dyadic Interaction Modeling for Social Behavior Generation Di Chang*, Minh Tran*, Maksim Siniukov, Mohammad Soleymani (*equal contribution) Arxiv Preprint [paper]
	MagicDance: Realistic Human Dance Video Generation with Motions & Facial Expressions Transfer Di Chang, Yichun Shi, Quankai Gao, Jessica Fu, Hongyi Xu, Guoxian Song, Qing Yan, Xiao Yang, Mohammad Soleymani Arxiv Preprint [project page] [paper] [code] [video]

Selected Publications [Google Scholar]

	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]
	FG-Net: Facial Action Unit Detection with Generalizable Pyramidal Features Yufeng Yin, Di Chang, Guoxian Song, Shen Sang, Tiancheng Zhi, Jing Liu, Linjie Luo, and Mohammad Soleymani IEEE/CVF Winter Conference on Applications of Computer Vision (WACV), 2024. (Algorithms 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]
	Generalized Binary Search Network for Highly-Efficient Multi-View Stereo Zhenxing Mi, Di Chang and Dan Xu IEEE/ CVF International Conference on Computer Vision and Pattern Recognition (CVPR), 2022. [project page] [paper] [code]

Intern & Work Experience

TikTok, Los Angeles, CA, USA (Aug. 2023 - Nov. 2023) Position: Research Scientist Intern (Part-time) at ByteDance AI Lab US Supervisor: Dr. Yichun Shi , Dr. Guoxian Song , Dr. Hongyi Xu , and Dr. Xiao Yang Project: Half-body Motion Transfer with Diffusion Models

TikTok, San Jose, CA, USA (May. 2023 - Aug. 2023) Position: Research Scientist Intern at ByteDance AI Lab US Supervisor: Dr. Yichun Shi , Dr. Guoxian Song , Dr. Hongyi Xu , and Dr. Xiao Yang Project: Text-guided Half-body Image Editing 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 (Mar. 2022 - Aug. 2022) Position: Guided Research in 3D AI Group Supervisor: Prof. Angela Dai Project: Single-View Reconstruction and Category-level NeRF

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 --> ECCV 2022

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 --> CVPR 2022

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

• (10 yrs +) 🎷Clarinet, professional player, once level 9 certification of The Central Conservatory of Music.
• (8 yrs +) 🏸Badminton, I was a member of DUT EE Department badminton team.
• (5 yrs +) 🎮Video Games, I am a lover of League of Legends, highest rank: Platinum II of EU server S12.
• (6 months) 🏁Car Racing, I love racing with my Chevy Camaro SS. Find me at Angeles Crest Highway or Azusa on weekends!

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Last update: Jan. 15, 2024