Zexiang Xu (徐泽祥)

I am a research scientist at Adobe Research. I obtained my Ph.D. at University of California, San Diego, working with Prof. Ravi Ramamoorthi. During my PhD, my research has been recognized by Adobe Research Fellowship (2019) and UCSD Chancellor’s Dissertation Medal (2021).

My research interests lie at the intersection of computer vision, computer graphics, and machine learning. My research focus is to enable efficient and realistic 3D scene reconstruction and rendering, especially by reinventing 3D neural modules in classic 3D pipelines. My work has broadly covered 3D reconstruction, 3D generation, neural representations, view synthesis, relighting, rendering, appearance modeling, and appearance acquisition.

Adobe internship: If you are interested in interning at Adobe with me, feel free to send me an email with your research interests.

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Selected Publications

MeshLRM: Large Reconstruction Model for High-Quality Meshes

Xinyue Wei*, Kai Zhang*, Sai Bi, Hao Tan, Fujun Luan, Valentin Deschaintre, Kalyan Sunkavalli, Hao Su, Zexiang Xu

arXiv 2024

[Paper] [Project]

GS-LRM: Large Reconstruction Model for 3D Gaussian Splatting

Kai Zhang*, Sai Bi*, Hao Tan*, Yuanbo Xiangli, Nanxuan Zhao, Kalyan Sunkavalli, Zexiang Xu

ECCV 2024

[Paper] [Project]

SuperGaussian: Repurposing Video Models for 3D Super Resolution

Yuan Shen, Duygu Ceylan, Paul Guerrero, Zexiang Xu, Niloy J. Mitra, Shenlong Wang, Anna Früshtück

ECCV 2024

[Paper] [Project]

Neural Directional Encoding for Efficient and Accurate View-Dependent Appearance Modeling

Liwen Wu, Sai Bi, Zexiang Xu, Fujun Luan, Kai Zhang, Iliyan Georgiev, Kalyan Sunkavalli, Ravi Ramamoorthi

CVPR 2024 (Highlight)

[Paper] [Project]

DMV3D:Denoising Multi-View Diffusion using 3D Large Reconstruction Model

Yinghao Xu, Hao Tan, Fujun Luan, Sai Bi, Peng Wang, Jiahao Li, Zifan Shi, Kalyan Sunkavalli, Gordon Wetzstein, Zexiang Xu†, Kai Zhang†

ICLR 2024 (Spotlight)

[Paper] [Project]

PF-LRM: Pose-Free Large Reconstruction Model for Joint Pose and Shape Prediction

Peng Wang, Hao Tan, Sai Bi, Yinghao Xu, Fujun Luan, Kalyan Sunkavalli, Wenping Wang, Zexiang Xu, Kai Zhang

ICLR 2024 (Spotlight)

[Paper] [Project]

Instant3D: Fast Text-to-3D with Sparse-View Generation and Large Reconstruction Model

Jiahao Li, Hao Tan, Kai Zhang, Zexiang Xu, Fujun Luan, Yinghao Xu, Yicong Hong, Kalyan Sunkavalli, Greg Shakhnarovich, Sai Bi

ICLR 2024

[Paper] [Project]

MovingParts: Motion-based Part Discovery in Dynamic Radiance Field

Kaizhi Yang, Xiaoshuai Zhang, Zhiao Huang, Xuejin Chen, Zexiang Xu†, Hao Su†

ICLR 2024 (Spotlight)

[Paper] [Project]

MCNeRF: Monte Carlo Rendering and Denoising for Real-Time NeRFs

Kunal Gupta, Miloš Hašan, Zexiang Xu, Fujun Luan, Kalyan Sunkavalli, Xin Sun, Manmohan Chandraker, Sai Bi

SIGGRAPH Asia 2023

[Paper] [Project]

Strivec: Sparse Tri-Vector Radiance Fields

Quankai Gao*, Qiangeng Xu*, Hao Su, Ulrich Neumann, Zexiang Xu

ICCV 2023

[Paper] [Code]

One-2-3-45: Any Single Image to 3D Mesh in 45 Seconds without Per-Shape Optimization

Minghua Liu*, Chao Xu*, Haian Jin*, Linghao Chen*, Mukund Varma T, Zexiang Xu, Hao Su

NeurIPS 2023

[Project] [Code]

Dictionary Fields: Learning a Neural Basis Decomposition

Anpei Chen, Zexiang Xu, Xinyue Wei, Siyu Tang, Hao Su, Andreas Geiger

SIGGRAPH 2023 (Journal Track)

[Project]

Factor Fields: A Unified Framework for Neural Fields and Beyond

Anpei Chen, Zexiang Xu, Xinyue Wei, Siyu Tang, Hao Su, Andreas Geiger

arXiv 2023

[Project] [Paper]

TensoIR: Tensorial Inverse Rendering

Haian Jin*, Isabella Liu*, Peijia Xu, Xiaoshuai Zhang, Songfang Han, Sai Bi, Xiaowei Zhou, Zexiang Xu†, Hao Su†

CVPR 2023

[Project] [Paper]

RenderDiffusion: Image Diffusion for 3D Reconstruction, Inpainting and Generation

Titas Anciukevicius, Zexiang Xu, Matthew Fisher, Paul Henderson, Hakan Bilen, Niloy J. Mitra, Paul Guerrero

CVPR 2023

[Project] [Paper]

TensoRF: Tensorial Radiance fields

Anpei Chen*, Zexiang Xu*, Andreas Geiger, Jingyi Yu , Hao Su

ECCV 2022

[Project] [Paper]

ARF: Artistic Radiance Fields

Kai Zhang, Nick Kolkin, Sai Bi, Fujun Luan, Zexiang Xu, Eli Shechtman, Noah Snavely

ECCV 2022

[Project] [Paper]

Physically-based Editing of Indoor Scene Lighting from a Single Image

Zhengqin Li, Jia Shi, Sai Bi, Rui Zhu, Kalyan Sunkavalli, Miloš Hašan, Zexiang Xu, Ravi Ramamoorthi, Manmohan Chandraker

ECCV 2022 (Oral)

[Project] [Paper]

Rendering Neural Materials on Curved Surfaces

Alexandr Kuznetsov, Xuezheng Wang, Krishna Mullia, Fujun Luan, Zexiang Xu, Miloš Hašan, Ravi Ramamoorthi

SIGGRAPH 2022

[Project]

NeRFusion: Fusing Radiance Fields for Large-Scale Scene Reconstruction

Xiaoshuai Zhang, Sai Bi, Kalyan Sunkavalli, Hao Su, Zexiang Xu

CVPR 2022 (Oral)

[Project] [Paper]

Point-NeRF: Point-based Neural Radiance Fields

Qiangeng Xu, Zexiang Xu, Julien Philip, Sai Bi, Zhixin Shu Kalyan Sunkavalli , Ulrich Neumann

CVPR 2022 (Oral)

[Project] [Paper]

RigNeRF: Fully Controllable Neural 3D Portraits

ShahRukh Athar, Zexiang Xu, Kalyan Sunkavalli, Eli Shechtman, Zhixin Shu

CVPR 2022

[Paper]

PhotoScene: Photorealistic Material and Lighting Transfer for Indoor Scenes

Yu-Ying Yeh, Zhengqin Li, Yannick Hold-Geoffroy, Rui Zhu, Zexiang Xu, Miloš Hašan, Kalyan Sunkavalli, Manmohan Chandraker

CVPR 2022

[Paper]

MVSNeRF: Fast Generalizable Radiance Field Reconstruction from Multi-View Stereo

Anpei Chen*, Zexiang Xu*, Fuqiang Zhao, Xiaoshuai Zhang, Fanbo Xiang, Jingyi Yu, Hao Su

ICCV 2021

[arXiv] [Project]

NeLF: Neural Light-transport Field for Portrait View Synthesis and Relighting

Tiancheng Sun*, Kai-En Lin*,Sai Bi, Zexiang Xu, Ravi Ramamoorthi

EGSR 2021

[Project]

Path Graphs: Iterative Path Space Filtering

Xi Deng, Miloš Hašan, Nathan Carr, Zexiang Xu, Steve Marschner

SIGGRAPH Asia 2021 (TOG)

[Paper]

NeuMIP: Multi-Resolution Neural Materials

Alexandr Kuznetsov, Krishna Mullia, Zexiang Xu, Miloš Hašan, Ravi Ramamoorthi

SIGGRAPH 2021 (TOG)

[Project]

Hierarchical Neural Reconstruction for Path Guiding Using Hybrid Path and Photon Samples

Shilin Zhu, Zexiang Xu,Tiancheng Sun, Alexandr Kuznetsov, Mark Meyer, Henrik Wann Jensen, Hao Su, Ravi Ramamoorthi

SIGGRAPH 2021 (TOG)

[Paper]

Photon-Driven Neural Path Guiding

Shilin Zhu, Zexiang Xu,Tiancheng Sun, Alexandr Kuznetsov, Mark Meyer, Henrik Wann Jensen, Hao Su, Ravi Ramamoorthi

TOG 2022

[arXiv]

NeuTex: Neural Texture Mapping for Volumetric Neural Rendering

Fanbo Xiang, Zexiang Xu,Miloš Hašan, Yannick Hold-Geoffroy, Kalyan Sunkavalli, Hao Su

CVPR 2021 (Oral)

[arXiv] [Project]

OpenRooms: An Open Framework for Photorealistic Indoor Scene Datasets

Zhengqin Li, Ting-Wei Yu, Shen Sang, Sarah Wang, Meng Song, Yuhan Liu, Yu-Ying Yeh, Rui Zhu, Nitesh Gundavarapu, Jia Shi, Sai Bi, Zexiang Xu, Hong-Xing Yu, Kalyan Sunkavalli, Miloš Hašan, Ravi Ramamoorthi, Manmohan Chandraker

CVPR 2021 (Oral)

[Project]

Light stage super-resolution: continuous high-frequency relighting

Tiancheng Sun, Zexiang Xu, Xiuming Zhang, Sean Fanello, Christoph Rhemann, Paul Debevec, Yun-Ta Tsai, Jonathan T. Barron, Ravi Ramamoorthi

SIGGRAPH Asia 2020 (TOG)

[Project]

Neural Reflectance Fields for Appearance Acquisition

Sai Bi*, Zexiang Xu*, Pratul P. Srinivasan, Ben Mildenhall, Kalyan Sunkavalli, Miloš Hašan, Yannick Hold-Geoffroy, David Kriegman, Ravi Ramamoorthi

arXiv 2020

[arXiv]

Deep Reflectance Volumes: Relightable Reconstructions from Multi-View Photometric Images

Sai Bi, Zexiang Xu, Kalyan Sunkavalli, Miloš Hašan, Yannick Hold-Geoffroy, David Kriegman, Ravi Ramamoorthi

ECCV 2020 (Spotlight)

[arXiv] [video]

Deep Multi Depth Panoramas for View Synthesis

Kai-En Lin, Zexiang Xu, Ben Mildenhall, Pratul P. Srinivasan, Yannick Hold-Geoffroy, Stephen DiVerdi, Qi Sun, Kalyan Sunkavalli, Ravi Ramamoorthi

ECCV 2020

[arXiv] [video]

Deep Kernel Density Estimation for Photon Mapping

Shilin Zhu*, Zexiang Xu*, Henrik Wann Jensen, Hao Su, Ravi Ramamoorthi

EGSR 2020 (CGF journal track)

[paper]

Deep Stereo using Adaptive Thin Volume Representation with Uncertainty Awareness

Shuo Cheng*, Zexiang Xu*, Shilin Zhu, Zhuwen Li, Li Erran Li, Ravi Ramamoorthi, Hao Su

CVPR 2020 (Oral)

[arXiv]

Deep 3D Capture: Geometry and Reflectance from Sparse Multi-View Images

Sai Bi, Zexiang Xu, Kalyan Sunkavalli, David Kriegman, Ravi Ramamoorthi

CVPR 2020

[arXiv] [video]

Learning Generative Models for Rendering Specular Microgeometry

Alexandr Kuznetsov, Miloš Hašan,Zexiang Xu, Lingqi Yan, Bruce Walter, Nima Khademi Kalantari, Steve Marschner, Ravi Ramamoorthi

SIGGRAPH Asia 2019 (TOG)

[arXiv] [video]

Deep View Synthesis from Sparse Photometric Images

Zexiang Xu, Sai Bi, Kalyan Sunkavalli, Sunil Hadap, Hao Su, Ravi Ramamoorthi

SIGGRAPH 2019 (TOG)

[paper] [video]

Single Image Portrait Relighting

Tiancheng Sun, Jonathan T. Barron, Yun-Ta Tsai, Zexiang Xu, Xueming Yu, Graham Fyffe, Christoph Rhemann, Jay Busch, Paul Debevec, Ravi Ramamoorthi

SIGGRAPH 2019 (TOG)

[paper] [video]

Learning to Reconstruct Shape and Spatially-Varying Reflectance from a Single Image

Zhengqin Li, Zexiang Xu, Ravi Ramamoorthi, Kalyan Sunkavalli, Manmohan Chandraker

SIGGRAPH Asia 2018 (TOG)

[paper] [video]

Deep Image-based Relighting from Optimal Sparse Samples

Zexiang Xu, Kalyan Sunkavalli, Sunil Hadap, Ravi Ramamoorthi

SIGGRAPH 2018 (TOG)

[paper] [project]

Robust Energy Minimization for BRDF-Invariant Shape from Light Fields

Zhengqin Li, Zexiang Xu, Ravi Ramamoorthi, Manmohan Chandraker

CVPR 2017

[paper]

Minimal BRDF Sampling for Two-Shot Near-Field Reflectance Acquisition

Zexiang Xu, Jannik Boll Nielsen, Jiyang Yu, Henrik Wann Jensen, Ravi Ramamoorthi

SIGGRAPH Asia 2016

[paper]

Dynamic Hair Capture using Spacetime Optimization

Zexiang Xu, Hsiang-Tao Wu, Lvdi Wang, Changxi Zheng, Xin Tong, Yue Qi

SIGGRAPH Asia 2014

[paper] [video]