Research Seminar: A Crowdsourcing Approach to Generate 3D Building Models

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Date

03 May 2024
Organiser

Department of Land Surveying and Geo-Informatics
Time

16:30 - 17:30
Venue

Z414 Map

Speaker

Prof. Dr. Hongchao FAN

Enquiry

Ms Stephanie Cheung (852) 3400 3662 stephanie.sy.cheung@polyu.edu.hk

Summary

LoD3 building models are important elements in digital twins of cities. They include complicated roof structures and detailed façade geometries with rich semantic information. In this talk, Prof. Fan will present the recent research findings in generating 3D building models at LoD3 using a VGI3D platform. He will elaborate the concept and philosophy of designing this interactive platform based on the study of contribution behaviors of internet users. The talk will also include algorithms and implementations of how to make building models at Lod2 and other city objects available in the platform in order to encourage volunteers to contribute LoD3 building models through the platform. The research group at NTNU has developed automated process to detect façade elements from street-level images and integrated them into the VGI3D platform aiming to reducing the interaction works of volunteers. Prof. Fan will also share his experiences about using deep learning-based methods and conventional rule-based methods for 3D modelling and discuss the recent tendency of using deep-learning technology in Geomatics.

Poster

Keynote Speaker

Prof. Dr. Hongchao FAN

Professor Dr. -ING
Department of Civil and Environmental Engineering
Norwegian University of Science and Technology, Norway

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Hongchao Fan is professor for 3D Geoinformatics at the Department of Civil and Environmental Engineering at the Norwegian University of Science and Technology (NTNU). He obtained his master degree at University of Stuttgart in 2006 and his PhD degree at the Technical University of Munich in 2010. Then he worked as Group Leader for 3D Data Infrastructure at the Heidelberg University in Germany. He was professor at Wuhan University and has been professor at NTNU since 2018. His research interests include 3D city modelling, Photogrammetery, and laser scanning.