Stone Tong ZHANG
I am currently a research intern at vivo AI Research, working on controllable image generation, latent world models, and multimodal reasoning. Previously, I received my M.S. in Computer Engineering from the University of California, Irvine and my B.Eng. in Computer Science and Engineering from Southern University of Science and Technology. My research focuses on bridging vision and language through structured representation, world simulation, and step-by-step visual reasoning. Feel free to get in touch!
- Sep. 2019–Jun. 2023, Southern University of Science and Technology, BEng, Computer Science and Engineering
- Sep. 2022–Jun. 2024, University of California, Irvine, M.S., Computer Engineering
Academic Projects
Unintended Side Effects of Defense Mechanisms in Large Language Models
Prof.
Haizhou Li, CUHK-Shenzhen
PyTorch, LaTeX
- Conducted a comprehensive analysis of 11 defense mechanisms applied to 6 LLMs, evaluating their impact on model performance, over-refusal, and token overhead
- Proposed 9 meta-defenders to systematically analyze trade-offs between safety and utility in model responses
- Provided actionable insights on designing robust LLMs for safety-critical applications
Human-Readable SVG Generation with Vision Language Models
Assistant Prof. Haohan Wang,
UIUC
PyTorch
- Developed S²VG², an innovative method integrating vision language models for scalable vector graphics (SVG) generation
- Curated the SVG-SHAPE dataset to benchmark SVG generation and model reasoning capabilities
- Demonstrated state-of-the-art performance in SVG reasoning of LLMs and vision metrics
One-shot Controllable Head Avatar Creation
Prof. Xiaohui Xie, UCI
PyTorch
- Pioneered CVTHead, a framework for point-based neural rendering from monocular images
- Conducted comprehensive benchmarks against leading methods for cross-identity reenactment
- Demonstrated state-of-the-art approaches on VoxCeleb1 and VoxCeleb2, with improved efficiency (Accepted by WACV 2024)
Trajectory Prediction and Driving Video Caption
Assistant Prof.
Hao Zhao, THU
NumPy, PyTorch
- Predicted trajectory on a new interactive motion dataset using AgentFormer and Trajectron++
- Trained a novel end-to-end transformer generating description and explanation of the video
- Demonstrated state-of-the-art performance (co-authored paper accepted to ICRA 2023)
Professional Experience
Image Editing via Reasoning
vivo AI Research
PyTorch, Python
- Developed an energy-based heatmap refinement algorithm for high- fidelity image editing
- Explored VLM + CoT paradigms for multi-round editing via “generate–reflect–revise” visual reasoning
Lightweight OCR Models for OpenCV
OpenCV @
Google Summer of Code
PyTorch, ONNX, C++
- Implemented the detection part of PP-OCRv2 model in OpenCV Zoo via ONNX
- Developed a high-level C++ API for PP-OCRv2 in OpenCV
- Built evaluation metrics for text detection (AP, Recall, Precision, Hmean) in OpenCV Zoo
Publications
- Tong Zhang, Yiming Chen, Simin Chen, Zexin Li, Xianghu Yue, Cong Liu, Chenyu You, Wei Yang, Haizhou Li, and Tao Xie, “Unintended Side Effects of Defense Mechanisms in Large Language Models: A Comprehensive Study”, Under Review, 2025.
- Tong Zhang, Haoyang Liu, Peiyan Zhang, Yuxuan Cheng, and Haohan Wang, “Beyond Pixels: Exploring Human-Readable SVG Generation for Simple Images with Vision Language Models”, Preprint, 2024.
- Haoyu Ma, Tong Zhang, Shanlin Sun, Xiangyi Yan, Kun Han, and Xiaohui Xie, “CVTHead: One-shot Controllable Head Avatar with Vertex-feature Transformer”, IEEE/CVF Winter Conference on Applications of Computer Vision (WACV), 2024.
- Bu Jin, Xinyu Liu, Yupeng Zheng, Pengfei Li, Hao Zhao, Tong Zhang, Yuhang Zheng, Guyue Zhou and Jingjing Liu, “ADAPT: Action-aware Driving Caption Transformer”, IEEE International Conference on Robotics and Automation (ICRA), 2023.
Facts about Me
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