About Me

Shiu-Hong Kao is a first-year PhD student in Computer Science in the CVML Group at National University of Singapore (NUS), advised by Prof. Angela Yao. His research focuses on video understanding, reasoning segmentation, and LLM/MLLM reasoning.

News

Recent Updates
Oct. 2026
A new preprint, RLCPR, is released on arXiv.
Sep. 2026
A new preprint, Rita, is released on arXiv.
Mar. 2026
CoT-Seg is accepted to ICLR 2026 Workshop RSI.
Jan. 2026
CoT-RVS is accepted to ICLR 2026.
Jan. 2026
He joined the PhD program at NUS.
Jun. 2025
StreamGS is accepted to ICCV 2025.
Jan. 2025
He received the Stars of Tomorrow Award from Microsoft Research Asia.

Recent Publications

View all...
Latest 3
Posterior Concentration Phenomenon: reward variance decreases as reasoning length increases

Rethinking Probability-Based Reinforcement Learning From Posterior Concentration

Shiu-Hong Kao, Yubo Zhao, Zhenyu Tian, Pengzhan Sun, Yicong Li, Angela Yao

arXiv preprint, 2026

We identify the Posterior Concentration Phenomenon (PCP) in probability-rewarded long-horizon reasoning and propose RLCPR, a verifier-free RL framework that improves optimization stability, accuracy, and token efficiency.

Rita comparison showing improved consistency between reasoning and grounding answers

Aligning Thoughts with Answers: Probability Rewards to Tame Thinking Drift

Pengzhan Sun*, Shiu-Hong Kao*, Shijie Li, Yongyi Su, Junbin Xiao, Arjun Reddy Akula, Angela Yao

arXiv preprint, 2026

*Equal contribution. We propose Rita, a reasoning-label-free RL paradigm that uses probability-based thinking and consistency rewards to reduce thinking drift in visual intention grounding.

CoT-RVS teaser

CoT-RVS: Zero-Shot Chain-of-Thought Reasoning Segmentation for Videos

Shiu-Hong Kao, Yu-Wing Tai, Chi-Keung Tang

International Conference on Learning Representations (ICLR), 2026

We propose CoT-RVS to extract the temporal-semantic correlation in videos with chain of thoughts and achieve the state-of-the-art performance for reasoning video segmentation.

Experience

Research & Service
Research Intern
Media Computing Group, Microsoft Research Asia
Jun. 2024 - Dec. 2024

Conducted research in 3D computer vision and contributed to research publications in the community.

Software Engineer Intern
Hong Kong Applied Science and Technology Research Institute (ASTRI)
Jun. 2021 - Aug. 2021

Designed and developed algorithms across image processing, OCR, data parsing, and deep learning. Report

Reviewing Services

  • Conference Reviewer
    ICLR 2025, NeurIPS 2026, WACV 2027, ICLR 2027
  • Sub-reviewer
    BMVC 2023, ICLR 2024, CVPR 2024
  • Journal Reviewer
    TOMM

Teaching Assistant

  • COMP4471/ELEC4240 (HKUST)
    Deep Learning in Computer Vision, Spring 2025
  • COMP4411 (HKUST)
    Computer Graphics, Spring 2024
  • COMP2611 (HKUST)
    Computer Organization, Fall 2022 and Spring 2023

Awards & Honors

Recognition
  • NUS Research Scholarship, 2026
  • Stars of Tomorrow Internship Award of Excellence, Microsoft Research, 2025
  • Postgraduate Scholarship, HKUST, 2023-2025
  • First Class Honors, HKUST, 2023
  • University Scholarship for Continuing Undergraduate Students, HKUST, 2022 and 2023
  • Dean's List, HKUST, Fall 2019, Fall 2020, Spring 2021, Fall 2022, Spring 2023
  • Dean's List (High Honors), Northwestern University, Spring 2022
  • S.S. Chern Class Scholarship, HKUST, 2021
  • Silver Medal, Yau's Award, National Taiwan University, 2018