This is the best talk I have attended in this semester! See the amazing publications for details:


3D modeling of urban environments starts to play an increasingly important role in the emerging technologies from self-driving car to augmented reality. Beyond helping a human or a vehicle navigate, 3D urban models provide a base for spatially registering otherwise chaotic urban data, both sensor sensed and user generated, for better ‘mapping’ of urban big data. In this talk, I will introduce our decade long effort on acquiring and modeling large urban environments as well as analyzing and visualizing urban activities. I will also discuss future developments in this direction.


Baoquan Chen is a Professor and Dean (CS & Software) of Shandong University. Prior to the current post, he was the founding director of the Visual Computer Research Center, Shenzhen Institutes of Advanced Technology (SIAT), Chinese Academy of Sciences, and a faculty member at CS&E at the University of Minnesota at Twin Cities. His research interests generally lie in computer graphics, visualization, and human-computer interaction. Chen received PhD in CS from SUNY@Stony Brook, and MS in EE from Tsinghua. He received NSF CAREER award in 2003 and IEEE Visualization Best Paper Award in 2005. Chen served as conference chair of IEEE Visualization 2005, and more recently SIGGRAPH Asia 2014. More at:

Some works I especially liked:

Painterly Rendering of Points Abstraction and Rendering of Sparsely Scanned Outdoor Environments[pdf (8.3MB)], [animation (26.7MB)] , Hui Xu, Nathan Gossett, and Baoquan Chen, Proceedings of the 2004 Eurographics Symposium on Rendering (EGSR’04), Jun 21-23, 2004, Norrköping, Sweden.
Proactive 3D Scanning of Inaccessible Parts Proactive 3D Scanning of Inaccessible PartsFeilong Yan, Andrei Sharf, Wenzhen Lin, Hui Huang, Baoquan Chen
Conditionally accepted to SIGGRAPH 2014
Quality-driven Poisson-guided Autoscanning newQuality-driven Poisson-guided AutoscanningShihao Wu, Wei Sun, Pinxin Long, Hui Huang, Daniel Cohen-Or, Minglun Gong, Oliver Deussen, Baoquan Chen
Conditionally accepted to SIGGRAPH Asia 2014
Sketch-to-Design: Context-based Part Assembly Analyzing Growing Plants from 4D Point Cloud DataYangyan Li, Xiaochen Fan, Niloy J. Mitra, Daniel Chamovitz, Daniel Cohen-Or, Baoquan Chen
ACM Transactions on Graphics (Proceedings of SIGGRAPH Asia 2013)


Incomplete Notes:

    • 3D Acquisition Techniques
      • Satellite images
      • Aero-photos
      • Camera / Video
      • 3D Digital Cities
    • 3D from Laser Scanning
    • Object -> scene
    • Static -> dynamic
  • Terrestrial Scanner (2002)
    • Color Image
    • Intensity Image
    • Range Image
  • Scanning sites
    • 6 Scans, 10M points
  • Point-based Artistic Rendering
    • Sketch / Watercolor / Carton / Intermingle
  • Vehicle Mounting
    • Summer 2006
    • CBS/WCCO Evening News
  • Data Challenge – Sparse and Incomplete
    • Oblique scanning angle