Changjian Li (李昌健)

Assistant Professor

Institute of Perception, Action and Behaviour (IPAB)
School of Informatics
University of Edinburgh

Address:
Room 1.10, Informatics Forum,
10 Crichton Street, Edinburgh,
EH8 9AB, United Kingdom

Email: Changjian.li@ed.ac.uk

[CV]    [Google Scholar]    [Edinburgh PURE]

Biography

I am an Assistant Professor in the School of Informatics at the University of Edinburgh. I have a board range of research interests in 3D Shape Creation and Analysis with applications in Sketch-based Modeling, Shape Reconstruction and Analysis from Point Clouds, and Medical Image Processing and Modeling. For sketch-based modeling (my representative line of research), we have recently developed two systems for easier CAD modeling by combining the advanced neural network and traditional optimization, where we translate intuitive sketches into CAD programs that greatly facilitate the downstream applications.

Before joining University of Edinburgh, I worked at Inria as a Starting Researcher working with Dr. Adrien Bousseau and did my postdoc in the Smart Geometry Processing Group at University College London (UCL) working with Prof. Niloy Mitra. I got my Ph.D. degree from the University of Hong Kong in 2019 supervised by Prof. Wenping Wang and got my Bachelor degree from Shandong University in 2014.

Accepting Students: I am looking for highly motivated students, feel free to drop me an email with your CV.

News

10/11, 2023: We have one paper accepted to TVCG for point cloud upsampling, congratulation to Guangshun!
10/01, 2023: Welcome Miaowei to join the School of Informatics.
09/10, 2023: Welcome Haocheng, Yue, Mingjun, and Jing to join our group.
05/10, 2023: Welcome Ankan to join the School of Informatics.
10/20, 2022: I have joined the University of Edinburgh as an Assistant Professor.

Publications

# Corresponding author; * Equal contribution

iPUNet: Iterative Cross Field Guided Point Cloud Upsampling
Guangshun Wei, Hao Pan, Shaojie Zhuang, Yuanfeng Zhou, Changjian Li.   IEEE Visualization and Computer Graphics (TVCG), 2023.
[Project page]  [Paper]  [Code,Data]  [DOI]

SNAF: Sparse-view CBCT Reconstruction with Neural Attenuation Fields
Yu Fang, Lanzhuju Mei, Changjian Li, Yuan Liu, Wenping Wang, Zhiming Cui, Dinggang Shen.
[arXiv]

ToothInpaintor: Tooth Inpainting from Partial 3D Dental Model and 2D Panoramic Image
Yuezhi Yang, Zhiming Cui, Changjian Li, Wenping Wang.
[arXiv]

CAD2Sketch: Generating Concept Sketches from CAD Sequences
Felix Hähnlein, Changjian Li, Niloy Mitra, Adrien Bousseau.  ACM Transaction on Graphics, 41(6), 2022, proceedings of SIGGRAPH Asia 2022.
[Project page]  [Paper]  [Code]  [DOI]

Free2CAD: Parsing Freehand Drawings into CAD Commands
Changjian Li, Hao Pan, Adrien Bousseau, Niloy Mitra.  ACM Transaction on Graphics, 41(4), 2022, proceedings of SIGGRAPH 2022.
[Project page]  [Paper]  [Code,Data]  [Supl]  [DOI]

Best Paper Honorable Mention Award


VertNet: Accurate Vertebra Localization and Identification Network from CT Images
Zhiming Cui, Changjian Li, Lei Yang, Chunfeng Lian, Feng Shi, Wenping Wang, Dijia Wu, Dinggang Shen. International Conference on Medical Image Computing and Computer Assisted Intervention (MICCAI), 2021.
[Project Page]  [Paper

Structure-Driven Unsupervised Domain Adaptation for Cross-Modality Cardiac Segmentation
Zhiming Cui, Changjian Li, Zhixu Du, Nenglun Chen, Guodong Wei, Runnan Chen, Lei Yang, Wenping Wang. IEEE Transactions on Medical Imaging (TMI), 2021.
[Project Page]  [Paper]  [Code

ScaffoldGAN: Synthesis of Scaffold Materials based on Generative Adversarial Networks
Hui Zhang, Lei Yang, Changjian Li, Bojian Wu, Wenping Wang. Computer-Aided Design (CAD), 2021.
[Paper

Hierarchical Morphology-Guided Tooth Instance Segmentation from CBCT Images
Zhiming Cui*, Bojun Zhang*, Chunfeng Lian, Changjian Li#, Lei Yang, Min Zhu#, Wenping Wang, Dinggang Shen#. Information Processing in Medical Imaging (IPMI), 2021.
[Project Page]  [Paper

Oral Presentation


Point2Skeleton: Learning Skeletal Representations from Point Clouds
Cheng Lin, Changjian Li#, Yuan Liu, Nenglun Chen, Yi-King Choi, Wenping Wang#. IEEE Conference on Computer Vision and Pattern Recognition (CVPR), 2021.
[Project Page]  [Paper]  [Code

Oral Presentation, Best Paper Candidate


TSegNet: an Efficient and Accurate Tooth Segmentation Network on 3D Dental Model
Zhiming Cui, Changjian Li, Nenglun Chen, Guodong Wei, Runnan Chen, Yuanfeng Zhou, Dinggang Shen, Wenping Wang.  Medical Image Analysis (MIA) , 2021
[Project Page] [Paper]  [Code]

RigidFusion: RGB-D Scene Reconstruction with Rigidly-moving Objects
Yushiang Wong, Changjian Li, Matthias Niessner, Niloy Mitra.     Eurographics (EG) , 2021.
[Project Page]  [Paper

SEG-MAT: 3D Shape Segmentation Using Medial Axis Transform
Cheng Lin, Lingjie Liu, Changjian Li, Leif Kobbelt, Bin Wang, Shiqing Xin, Wenping Wang.   IEEE Visualization and Computer Graphics (TVCG), 2020
[Project Page]  [arXiv Preprint]

Sketch2CAD: Sequential CAD Modeling by Sketching in Context
Changjian Li, Hao Pan, Adrien Bousseau, Niloy Mitra.  ACM Trans. Graph., 39(6), 2020, proceedings of SIGGRAPH Asia 2020
[Project page]  [Paper]  [Code,Data]  [Supl]  [DOI]

Floorplan-Jigsaw: Jointly Estimating Scene Layout and Aligning Partial Scans
Cheng Lin, Changjian Li, Wenping Wang.   International Conference on Computer Vision (ICCV), 2019
[Project Page]  [arXiv] [Paper]  [Supl

Our poster session is highlighted in the 'Computer Vision News, The magazine of the algorithm community': ICCV Daily 2019, Friday


ToothNet: Automatic Tooth Instance Segmentation and Identification from Cone Beam CT Images
Zhiming Cui, Changjian Li, Wenping Wang.   IEEE Conference on Computer Vision and Pattern Recognition (CVPR), 2019.
[Project page]  [Paper

Our poster session is highlighted in the technical news of IEEE Computer Society: Poster Sessions Provoke Deep Discussions at the 2019 Conference on CVPR.


Robust Flow-Guided Neural Prediction for Sketch-Based Freeform Surface Modeling
Changjian Li, Hao Pan, Yang Liu, Xin Tong, Alla Sheffer, Wenping Wang.  ACM Trans. Graph., 37(6), 2018, proceedings of SIGGRAPH Asia 2018
[Project page]  [Paper]  [Code,Data]  [Supl]  [DOI]

Our Teaser image was selected as the cover image of Transaction on Graphics of year 2018. And it also was selected by ACM SIGGRAPH Asia for technical paper press release as research highlights.


BendSketch: Modeling Freeform Surfaces Through 2D Sketching
Changjian Li, Hao Pan, Yang Liu, Xin Tong, Alla Sheffer, Wenping Wang.  ACM Trans. Graph., 36(4), 2017, proceedings of SIGGRAPH 2017
[Project page]  [Paper]  [Data]

Flow Aligned Surfacing of Curve Networks
Hao Pan, Yang Liu, Alla Sheffer, Nicholas Vining, Changjian Li, Wenping Wang.  ACM Trans. Graph., 36(4), 2015, proceedings of SIGGRAPH 2015
[Project page]  [Paper]  [Data]

Team

Current Students and Postdocs


Haocheng Yuan (PhD)
(with Hakan, Primary)

Yue Ruan (PhD)
(with Kartic, primary)

Mingjun Yang (MScR)

Ankan Bhunia (PhD)
(with Hakan, secondary)

Miaowei Wang (PhD)
(with Amir, secondary)

Salvatore Esposito (PhD)
(with Arno, Oisin, secondary)

Visiting and Intern Students


Guangshun Wei (Postdoc)
(Visiting Researcher - remote)

Jing Xu (UG)
(Intern Student)

Shuyuan Zhang (UG)
(Intern Student)

Jiawei Wang (UG)
(Intern Student - remote)

Kuankuan Cheng (UG)
(Intern Student - remote)

Teaching

2023-2024(S2) INFR11140 - Image and Vision Computing UoE Informatics
2023-2024(S1) INFR09051 - Informatics Large Practical UoE Informatics
2020-2021(S2) COMP0119 - Acquisition and Processig of 3D Geometry UCL CS
2017-2018(S2) COMP2396 - Object Oriented Programming and Java HKU CS
2016-2017(S1) ENGG1111 - Computer Programming and Applications HKU CS
2015-2016(S1) COMP7507 - Visualization and Visual Analytics HKU CS
2014-2015(S1) ENGG1111 - Computer Programming and Applications HKU CS

Invited Talks

Keynote Speaker at DIRA Workshop, ECCV2022, Tel Aviv
    High-quality CAD modeling via Rough Sketching.
Oct. 2022

Invited workshop speaker at GDC, Qingdao, China
    Free2CAD: Parsing Freehand Drawings into CAD Commands.
Aug. 2022

School of Software, Tsinghua University, China
    Creating, Analyzing and Processing 3D Data: Applications to interactive 3D modeling and to medical imaging.
Dec. 2021

School of Informatics, University of Edinburgh, UK
    Creating, Analyzing and Processing 3D Data: Applications to interactive 3D modeling and to medical imaging.
Oct. 2021

Stanford Human-Computer Interaction group, Stanford
    Sketch2CAD: Sequential CAD Modeling by Sketching in Context.
Jan. 2021

AI Lab Sharing Session, Autodesk
    Sketch2CAD: Sequential CAD Modeling by Sketching in Context.
Jan. 2021

Software College, Shandong University, Jinan
    Sketch-based Freeform Surface Modeling.
Oct. 2019

iDDA, The Chinese University of Hong Kong, Shenzhen
    SketchAShape: Sketch-based Freeform Surface Modeling.
Jul. 2019

IRC Lab, Shandong University
    Robust Flow-Guided Neural Prediction for Sketch-Based Freeform Surface Modeling.
    Automatic Tooth Instance Segmentation and Identification from CBCT Images.
Mar. 2019

DGP Lab, University of Toronto
    BendSketch: Modeling Freeform Surfaces Through 2D Sketching.
Sept. 2018

GAMES: Graphics And Mixed Environment Seminar, China
    Robust Flow-Guided Neural Prediction for Sketch-Based Freeform Surface Modeling.
Nov. 2018

Recent Community Services

Committee Service

  • SIGGRAPH Asia: Technical Program Committee 2023
  • SIGGRAPH
  • Poster Jury Committee, 2023
  • Geometry Design and Computing (GDC): Technical Program Committee 2022, 2023

Reviewer Service

  ACM Transaction on Graphics (TOG) 2022
  ACM SIGGRAPH 2021-2023
  ACM SIGGRAPH Asia 2015, 2019-2023
  Conference on Computer Vision and Pattern Recognition (CVPR) 2021
  International Conference on Computer Vision (ICCV) 2021
  IEEE Transactions on Visualization & Computer Graphics (TVCG) 2020-2023
  Eurographics (EG) 2019-2023
  ACM SIGCHI 2020, 2023
  ACM Symposium on User Interface Software and Technology (UIST) 2020
  Computer-Aided Design (CAD) 2019, 2022-2023
  Computer Graphics Forum (CGF) 2019
  Journal of Computer Science and Technology (JCST) 2019
  Pacific Graphics (PG) 2018, 2023
  Eurographics Symposium on Geometry Processing (SGP) 2018
  International Conference on Computer-Aided Design and Computer Graphics (CAD&CG) 2015, 2019
  Geometry Design and Computing (GDC) 2022, 2023
  IEEE Transactions on Image Processing (TIP) 2023
  Journal of Computer Science and Technology (JCST) 2023
  The Visual Computer (TVCJ) 2023
  Sensors 2020


©Changjian Li.  Last update: November, 2023.