About me

Welcome! I am Jiaxin Zhang(张佳鑫, Jason), a master student in Computer Science at Harbin Institute of Technology (HIT), supervised by Prof. Junjun Jiang. I recently completed a long-term research internship at the Multimodal Large Model Lab of Huawei 2012 Laboratories, where I was mentored by Dave Zhenyu Chen. I also earned my Bachelor’s degree in Computer Science and Technology from HIT.

My research focuses on 3D Vision and Spatial Multimodal Understanding and Generation, with the long-term goal of building spatially intelligent systems for physical-world interaction.

Beyond research, I am a backpacker—either my body or my mind is always on the road.

🪐 News

• 2026.06 Two papers were accepted by ECCV 2026.
• 2025.09 One paper was accepted by NeurIPS 2025.
• 2025.03 One paper was accepted by CVPR 2025.

Internships

• 2025.05 - 2026.09: Research Intern
  • Huawei 2012 Laboratories, Huawei
  • Department: Multimodal Large Model Lab
  • Supervisor: Dave Zhenyu Chen

Selected Award

• China National Scholarship, 2025
• Special-Class Scholarship for Postgraduate Students, 2024, 2025(Top 0.3%)
• Outstanding Graduate of Heilongjiang Province, China, 2024
• The First-class Scholarship at Harbin Institute of Technology, 2022, 2023
• Tencent Scholarship, 2023

Publications

SpatialSpeak: QA-Native Reconstruction with Local and Global Context for Spatial Chain-of-Thought Reasoning
Yang Cao, Jiaxin Zhang, Dave Zhenyu Chen, Yingji Zhong, Ruiyuan Gao, Lanqing Hong, Dan Xu
arXiv 2026

[Paper] [Code] [Project]

CoordRefer: Coordinate-Aware 3D Visual Grounding from Multiview Images
Haijie Li, Jiaxin Zhang, Dave Zhenyu Chen, Youyu Chen, Yanmin Wu, Jian Zhang
arXiv 2026

[Paper] [Project]

GAP-MLLM: Geometry-Aligned Pre-training for Activating 3D Spatial Perception in Multimodal Large Language Models
Jiaxin Zhang, Junjun Jiang, Haijie Li, Youyu Chen, Kui Jiang, Dave Zhenyu Chen
ECCV 2026

[Paper] [Code] [Project]

RegVGGT: Sustainable Visual Geometry Grounding for Streaming via Regulated Memory
Hongbo Mao, Junjun Jiang, Youyu Chen, Jiaxin Zhang, Zhemeng Dong, Xianming Liu
ECCV 2026

[Code]

Reframing Gaussian Splatting Densification with Complexity-Density Consistency of Primitives
Zhemeng Dong, Junjun Jiang, Youyu Chen, Jiaxin Zhang, Kui Jiang, Xianming Liu
NeurIPS 2025

[Paper] [Code] [Project]

COB-GS: Clear Object Boundaries in 3DGS Segmentation Based on Boundary-Adaptive Gaussian Splitting
Jiaxin Zhang, Junjun Jiang, Youyu Chen, Kui Jiang, Xianming Liu
CVPR 2025

[Paper] [Code] [Project]