I am a third-year Ph.D. student in Computer Science at the University of Maryland, College Park, working with Prof. Heng Huang. Previously, I obtained my B.S. degree at Peking University in Intelligence Science and Technology, School of Electronics Engineering and Computer Science. I was fortunate to work with Prof. Xu Sun during my undergraduate study. I am interested in building stronger large language models and vision-language models, alongside efforts to enhance their reliability and ensure safe use.

I’m always happy to connect! Feel free to email me if you’re interested in my research or possible collaborations!

Preprints

$^*$denotes equal contribution.

POET: Preference Optimization for Enhanced Text-to-Image Generation
Ruibo Chen*, Jiacheng Pan*, Heng Huang, Zhenheng Yang
arXiv, 2025 [Paper]

ImAgent: A Unified Multimodal Agent Framework for Test-Time Scalable Image Generation.
Kaishen Wang*, Ruibo Chen*, Tong Zheng, Heng Huang
arXiv, 2025 [Paper]

Selected Publications

$^*$denotes equal contribution.

An Ensemble Framework for Unbiased Language Model Watermarking
Ruibo Chen*, Yihan Wu*, Georgios Milis, Heng Huang
ICLR, 2026 [Paper]

Robust Distortion-Free Watermark for Autoregressive Audio Generation Models
Yihan Wu*, Georgios Milis*, Ruibo Chen*, Heng Huang
NeurIPS, 2025 [Paper, Code]

Improved Unbiased Watermark for Large Language Models
Ruibo Chen*, Yihan Wu*, Junfeng Guo, Heng Huang
ACL, 2025 [Paper, Code]

De-mark: Watermark Removal in Large Language Models
Ruibo Chen*, Yihan Wu*, Junfeng Guo, Heng Huang
ICML, 2025 [Paper, Code]

A Watermark for Order-Agnostic Language Models
Ruibo Chen*, Yihan Wu*, Yanshuo Chen, Chenxi Liu, Junfeng Guo, Heng Huang
ICLR, 2025 [Paper, Code]

A Watermark for Auto-Regressive Speech Generation Models
Yihan Wu*, Ruibo Chen*, Georgios Milis*, Junfeng Guo, Heng Huang
Interspeech, 2025 (Oral). [Paper, Code]

Your Vision-Language Model Itself Is a Strong Filter: Towards High-Quality Instruction Tuning with Data Selection
Ruibo Chen, Yihan Wu, Lichang Chen, Guodong Liu, Qi He, Tianyi Xiong, Chenxi Liu, Junfeng Guo, Heng Huang
ACL Findings, 2024 [Paper, Code, Models&Datasets]

Experiences

Research Scientist Intern at TikTok, 2025

Selected Honors and Awards

Dean’s Fellowship, University of Maryland, College Park, 2023-2025
Outstanding Graduates of Beijing, 2023
Outstanding Graduates of Peking University, 2023
National Scholarship, Ministry of Education, China 2022