Curtin Spatial Sciences Colloquium March 2019
Date & Time
Monday, 25 Mar 2019
- 6:00 pm
The Spatial Sciences Colloquium series is a series of seminars organised by Curtin University since 2014. The aim is to provide a forum for spatial sciences professionals, practitioners and researchers to hear and discuss the latest developments and vision for future directions. The colloquium presentations are conducted by academics and researchers who work at the forefront of spatial sciences technology and research including GNSS, Geodesy, GIScience, Remote Sensing, Photogrammetry and Laser Scanning. The Colloquia bring together industry, government and academic partners and are excellent opportunities to emphasise and promote the significance of spatial sciences within WA, Australia, and globally.
This event features:
Prof. Derek Lichti
Department of Geomatics Engineering, The University of Calgary, Canada
Recent advances in terrestrial laser scanning – optimal viewpoint placement and object recognition
Terrestrial laser scanners (TLSs) are precision measurement devices that can be used for a variety of applications requiring three‐dimensional data. They can capture very dense spatial data of large, complex environments in a matter of minutes. The raw point cloud data can be further processed to produce detailed 3D models of cultural heritage sites, industrial installations and construction sites.
This presentation will focus on two pertinent issues in the processing chain of terrestrial laser scanner data capture.
The first is optimal first order network design, which is the problem of determining the number and location of TLS instrument locations or viewpoints needed for complete site recording. Although this problem has been well treated in the context of geodetic and photogrammetric networks, it has not been sufficiently addressed for TLS networks that might comprise hundreds or even thousands of viewpoints. A hierarchical approach to TLS viewpoint planning based on a new weighted greedy algorithm will be described and demonstrated.
The second is the recognition of objects from TLS point cloud data for the specific application of construction progress monitoring. Robust statistical methods are used to identify geometric primitives comprising objects of interests. Results from construction sites and pre‐fabricated pipe modules will be presented.
About the presenter
Dr Derek Lichti is a Professor with the Department of Geomatics Engineering at the University of Calgary, Canada. He earned his bachelor’s degree from Ryerson University in 1993 and MSc and PhD from the University of Calgary in 1996 and 1999, respectively. From 1999 to 2007, he was a faculty member in the Department of Spatial Sciences at Curtin University. He has been at Calgary since 2008 and was Head of Department from 2013 to 2018. Since 2013, he has been the Editor‐in‐Chief of the ISPRS Journal of Photogrammetry and Remote Sensing and he served two terms (2004‐8, 2008‐12) as the Chair of the ISPRS Working Group on terrestrial laser scanning.
Building 207, Room 201
Sten Claessens - Curtin University, S.Claessens@curtin.edu.au
Johanna Gastevich - email@example.com