Kaifeng Zhang

I am a second-year Ph.D. student in computer science at Columbia University, advised by Prof. Yunzhu Li. Prior to this, I obtained my Bachelors degree from Tsinghua University (Yao Class). I am fortunate to receive mentorship from Prof. Kris Hauser during my Ph.D. study, and Prof. Xiaolong Wang, Prof. Yang Gao, Prof. Li Yi during my undergrad.

I am interested in robotics, 3D vision, physics simulation, and machine learning.

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We optimize a spring-mass physics model of deformable objects and integrate the model with 3D Gaussian Splatting for real-time re-simulation with rendering.

We learn particle-based object dynamics model from real-world sparse-view RGB-D recordings, enabling high-quality action-conditioned object motion prediction and rendering.

We learn neural dynamics models of objects from real perception data and combine the learned model with 3D Gaussian Splatting for action-conditioned predictive rendering.

We learn a material-conditioned neural dynamics model using graph neural network to enable predictive modeling of diverse real-world objects and achieve efficient manipulation via model-based planning.

We achieve 4D neural implicit reconstruction from only a single-view scan using deformation and topology regularizations.

We propose a fully self-supervised method for category-level 6D object pose estimation by learning dense 2D-3D geometric correspondences. Our method can train on image collections without any 3D annotations.

We show that fusing fine-grained features learned with low-level contrastive objectives and semantic features from image-level objectives can improve SSL pretraining.

If you are interested in my work and would like to discuss research opportunity, collaboration, Ph.D. application, or anything else, feel free to contact me via email: kaifeng dot z at columbia dot edu.

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