🎓 Second-year PhD Student at HKUST (Guangzhou), Robotics and Autonomous Systems (ROAS)
🔬 Research Interests: Generative Models, Reward Modeling, Vision Agents, Visual Perception
🧠 Current Focus: High-quality post-training, human-aligned reward modeling, multimodal agentic RL, and unified reasoning for visual understanding and generation
🌐 Website: ephemeral182.github.io
📧 Email: ephemeral182@gmail.com

I’m Sixiang Chen (陈思翔), advised by Prof. Lei Zhu and Prof. Fugee Tsung.
My work explores how generative and unified models can unlock new potential in image understanding and creation.

I believe research should matter to real users.
Some projects I lead — especially the PosterX series such as PosterCraft, PosterOmni, and PosterReward — aim to build dependable tools for designers and broader creative communities, while also pushing forward general post-training and alignment for image-text foundation models.

• 🧠 High-Quality Post-Training for Generative Models
  Building post-training and alignment methods for high-quality image-text generation and editing, with a focus on reward modeling, preference learning.

• 📏 Reward Modeling and Preference Alignment
  Designing reward models that align AI outputs with human standards in aesthetics, structure, typography, and usability.

• 🤖 Vision Agents & Unified Reasoning
  Exploring multimodal agentic RL and unified models for open-world visual understanding, generation, and reasoning.

A unified framework for generalized multi-task poster creation and editing, covering both local refinement and global design.

A reward model for accurate evaluation and alignment of high-quality graphic design generation.

Rethinking high-quality aesthetic poster generation in a unified framework.

• Feb 2026 — PosterOmni accepted by CVPR 2026
• Feb 2026 — PosterReward accepted by CVPR 2026
• Jan 2026 — PosterCraft accepted by ICLR 2026
• Jun 2025 — GenHaze accepted by ICCV 2025
• Apr 2025 — Released the GPT-4o Image Generation Capabilities evaluation report
• 2025 — Multiple papers accepted by CVPR / ICCV / AAAI
• 2024 — Papers accepted by NeurIPS / ECCV / CVPR, including CVPR 2024 Highlight

High-Quality Post-Training · Unified Model · Reward Modeling · Vision Agents · Image-Text Generation

Type	Tools
Writing / Academic
AI Research Assistants
Development / Coding
Training / Infra
Design / Prototyping