Congrong Xu

MS Student in ECE

University of Michigan, Ann Arbor

I work on 3D reconstruction, diffusion models, and 3D/4D perception — currently focused on the representations underneath, latent or explicit. I work closely with Prof. Jun Gao.

Before UMich, I was a visiting student at Westlake University, where I was fortunate to be advised by Anpei Chen and Yuliang Xiu. I received my bachelor's degree from ShanghaiTech University, with a year as a visiting student at UC Berkeley, where I joined the nerfstudio team, built Splatfacto-W, and was fortunate to be guided by Angjoo Kanazawa.

Besides research, I enjoy photography, playing the guitar, composing, traveling, and cooking.

Portrait of Congrong (Kevin) Xu A fluffy white cat lying on a round mat

one of the images is me

News

Publications

* denotes equal contribution. See Google Scholar for the full list.

arXiv 2026

R³: 3D Reconstruction via Relative Regression

Congrong Xu, Huachen Gao, Xingyu Chen, Yuliang Xiu, Jun Gao, Anpei Chen

Confidence-weighted relative poses assembled into trajectories — robust, low-memory streaming and offline 3D reconstruction, matching 1B baselines with a 0.3B model.

Paper Project
arXiv 2026

Modeling Depth Ambiguity: A Mixture-Density Representation for Flying-Point-Free Depth Estimation

Siyuan Bian*, Congrong Xu*, Jun Gao

Pixel-perfect multiview depth estimation that works across different backbones, largely eliminates flying points, and adds negligible overhead.

Paper Project
CVPR 2025

GenFusion: Closing the Loop between Reconstruction and Generation via Videos

Sibo Wu, Congrong Xu, Binbin Huang, Andreas Geiger, Anpei Chen

Bridges the conditioning gap between 3D reconstruction and generation with a video diffusion model that recurrently repairs and densifies reconstructed scenes.

Paper Project
arXiv 2024

Splatfacto-W: A Nerfstudio Implementation of Gaussian Splatting for Unconstrained Photo Collections

Congrong Xu, Justin Kerr, Angjoo Kanazawa

Real-time Gaussian splatting for in-the-wild photo collections, handling appearance variation and transient occluders — shipped in nerfstudio.

Paper Project Code

Open Source

Team member and maintainer of the modular framework for NeRF and Gaussian splatting research — bug fixes, PR reviews, and features including bilateral-grid appearance modeling and Splatfacto-W.

Code →

-webui

A web UI I built for nerfstudio — configure, train, and monitor NeRF / Gaussian splatting models from the browser, no command line required.

Code →
ControlledDreamGaussian 3D character generation process

ControlledDreamGaussian

Pose-controllable text-to-3D character generation — integrates ControlNet and LoRA into the DreamGaussian pipeline for multi-view-consistent 3D characters.

Report Code Project

Contact

The best way to reach me is by email: xucr@umich.edu. I'm always happy to chat about 3D vision, generative models, or open-source tooling.