Yuancheng Xu

Netflix
Email: xuyuancheng0 [at] gmail [dot] com
About me

My name is Yuancheng Xu (徐源诚) and I am a Senior Research Scientist at Netflix. My research focuses on advancing the capabilities of frontier AI systems while making them safer and better aligned with human intentions. My work spans LLM safety and alignment, as well as multimodal understanding, reasoning, interaction, and controllable video generation. I earned my Ph.D. in 2025 from the University of Maryland, College Park, under the supervision of Furong Huang.

Selected Research

Video Generation

[ID-V2V: Identity-preserving Video Restylization]
ID-V2V: Identity-preserving Video Restylization
Yuancheng Xu, Mingming He, Pablo Salamanca, Li Ma, Yash Kant, Emmett Steven, Paul Debevec, Ning Yu
SIGGRAPH Asia, 2026
[Paper] [Project Page] [Code]
[Vista4D: Video Reshooting with 4D Point Clouds]
Vista4D: Video Reshooting with 4D Point Clouds
Kuan Heng Lin, Zhizheng Liu, Pablo Salamanca, Yash Kant, Ryan Burgert, Yuancheng Xu, Koichi Namekata, Yiwei Zhao, Bolei Zhou, Micah Goldblum, Paul Debevec, Ning Yu
The IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR, Splotlight), 2026
[Paper] [Project Page] [Code]
[Virtually Being: Customizing Camera-Controllable Video Diffusion Models with Volumetric Performance Captures]
Virtually Being: Customizing Camera-Controllable Video Diffusion Models with Volumetric Performance Captures
Yuancheng Xu, Wenqi Xian, Li Ma, Julien Philip, Ahmet Taşel, Yiwei Zhao, Ryan Burgert, Mingming He, Oliver Hermann, Oliver Pilarski, Rahul Garg, Paul Debevec, Ning Yu
SIGGRAPH Asia, 2025
[Paper] [ACM] [Project Page]
[Go-with-the-Flow: Motion-Controllable Video Diffusion Models Using Real-Time Warped Noise]
Go-with-the-Flow: Motion-Controllable Video Diffusion Models Using Real-Time Warped Noise
Ryan D Burgert, Yuancheng Xu, Wenqi Xian, Oliver Pilarski, Pascal Clausen, Mingming He, Li Ma, Yitong Deng, Lingxiao Li, Mohsen Mousavi, Michael S Ryoo, Paul Debevec, Ning Yu
The IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR, Oral presentation), 2025
[Paper] [Code] [Project Page]

Safety and Alignment

[PropensityBench: Evaluating Latent Safety Risks in Large Language Models via an Agentic Approach]
PropensityBench: Evaluating Latent Safety Risks in Large Language Models via an Agentic Approach
Udari Madhushani Sehwag, Shayan Shabihi, Alex McAvoy, Vikash Sehwag, Yuancheng Xu, Dalton Towers, Furong Huang
International Conference on Learning Representations (ICLR), 2026
[Paper] [Code]
[Parm: Multi-objective Test-time Alignment via Preference-aware Autoregressive Reward Model]
Parm: Multi-objective Test-time Alignment via Preference-aware Autoregressive Reward Model
Baijiong Lin, Weisen Jiang, Yuancheng Xu, Hao Chen, Ying-Cong Chen
International Conference on Machine Learning (ICML), 2025
[Paper] [Code]
[GenARM: Reward Guided Generation with Autoregressive Reward Model for Test-Time Alignment]
GenARM: Reward Guided Generation with Autoregressive Reward Model for Test-Time Alignment
Yuancheng Xu, Udari Madhushani Sehwag, Alec Koppel, Sicheng Zhu, Bang An, Furong Huang, Sumitra Ganesh
International Conference on Learning Representations (ICLR), 2025
  • Propose the Autoregressive Reward Model to efficiently guide next-token generation.
[Paper] [Code] [Project Page]
[Can Watermarking Large Language Models Prevent Copyrighted Text Generation and Hide Training Data?]
Can Watermarking Large Language Models Prevent Copyrighted Text Generation and Hide Training Data?
Michael-Andrei Panaitescu-Liess, Zora Che, Bang An, Yuancheng Xu, Pankayaraj Pathmanathan, Souradip Chakraborty, Sicheng Zhu, Tom Goldstein, Furong Huang
AAAI Conference on Artificial Intelligence (AAAI), 2025
New Frontiers in Adversarial Machine Learning Workshop at Neurips (Best Paper), 2024
[Paper]
[Shadowcast: Stealthy Data Poisoning Attacks Against Vision-Language Models]
Shadowcast: Stealthy Data Poisoning Attacks Against Vision-Language Models
Yuancheng Xu, Jiarui Yao, Manli Shu, Yanchao Sun, Zichu Wu, Ning Yu, Tom Goldstein, Furong Huang
Neural Information Processing Systems (Neurips), 2024
  • First stealthy data poisoning attack against vision-language models.
[Paper] [Code] [Project Page] [Poster]
[Automatic Pseudo-Harmful Prompt Generation for Evaluating False Refusals in Large Language Models]
Automatic Pseudo-Harmful Prompt Generation for Evaluating False Refusals in Large Language Models
Bang An, Sicheng Zhu, Ruiyi Zhang, Michael-Andrei Panaitescu-Liess, Yuancheng Xu, Furong Huang
Conference on Language Modeling (COLM), 2024
[Paper] [Code] [Project Page]
[Equal Long-term Benefit Rate: Adapting Static Fairness Notions to Sequential Decision Making]
Adapting Static Fairness to Sequential Decision-Making: Bias Mitigation Strategies towards Equal Long-term Benefit Rate
Yuancheng Xu, Chenghao Deng, Yanchao Sun, Ruijie Zheng, Xiyao Wang, Jieyu Zhao, Furong Huang
International Conference on Machine Learning (ICML), 2024
[Paper] [Code]
[Benchmarking the Robustness of Image Watermarks]
Benchmarking the Robustness of Image Watermarks
Bang An, Mucong Ding, Tahseen Rabbani, Aakriti Agrawal, Yuancheng Xu, Chenghao Deng, Sicheng Zhu, Abdirisak Mohamed, Yuxin Wen, Tom Goldstein, Furong Huang
International Conference on Machine Learning (ICML), 2024
[Paper] [Code] [Project Page]
[Exploring and Exploiting Decision Boundary Dynamics for Adversarial Robustness]
Exploring and Exploiting Decision Boundary Dynamics for Adversarial Robustness
Yuancheng Xu, Yanchao Sun, Micah Goldblum, Tom Goldstein, Furong Huang
International Conference on Learning Representations (ICLR), 2023
  • Mathematical characterization of how decison boundary moves.
  • Analytic expression for the margin's gradient. Directly applicable to robust training.
[Paper] [Code]

Multimodal Reasoning

[Scaling Inference-time Search with Vision Value Model for Improved Visual Comprehension]
Scaling Inference-time Search with Vision Value Model for Improved Visual Comprehension
Xiyao Wang, Zhengyuan Yang, Linjie Li, Hongjin Lu, Yuancheng Xu, Chung-Ching Lin, Kevin Lin, Furong Huang, Lijuan Wang
International Conference on Computer Vision (ICCV), 2025
[Paper] [Code]
[Mementos: A Comprehensive Benchmark for Multimodal Large Language Model Reasoning over Image Sequences]
Mementos: A Comprehensive Benchmark for Multimodal Large Language Model Reasoning over Image Sequences
Xiyao Wang, Yuhang Zhou, Xiaoyu Liu, Hongjin Lu, Yuancheng Xu, Feihong He, Jaehong Yoon, Taixi Lu, Gedas Bertasius, Mohit Bansal, Huaxiu Yao, Furong Huang
Association for Computational Linguistics (ACL), 2024
[Paper] [Code] [Project Page]