Segmentation of planar surfaces in LiDAR point clouds of an electrical substation by exploring the structure of points neighbourhood
According to the Department of Energy of the USA, today’s electrical distribution system is 97.97% reliable. However, power outages and interruptions still impact many people. Many power outages are caused by animals coming into contact with the conductive elements of the electrical substations. T...
Main Authors: | , |
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Format: | Article |
Language: | English |
Published: |
Copernicus Publications
2014-06-01
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Series: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences |
Online Access: | https://www.int-arch-photogramm-remote-sens-spatial-inf-sci.net/XL-5/55/2014/isprsarchives-XL-5-55-2014.pdf |
Summary: | According to the Department of Energy of the USA, today’s electrical distribution system is 97.97% reliable. However, power
outages and interruptions still impact many people. Many power outages are caused by animals coming into contact with the
conductive elements of the electrical substations. This can be prevented by covering the conductive electrical objects with insulating
materials. The design of these custom-built insulating covers requires a 3D as-built plan of the substation. This research aims to
develop automated methods to create such a 3D as-built plan using terrestrial LiDAR data for which objects first need to be
recognized in the LiDAR point clouds. This paper reports on the application of a new algorithm for the segmentation of planar
surfaces found at electrical substations. The proposed approach is a region growing method that aggregates points based on their
proximity to each other and their neighbourhood dispersion direction. PCA (principal components analysis) is also employed to
segment planar surfaces in the electrical substation. In this research two different laser scanners, Leica HDS 6100 and Faro Focus3D,
were utilized to scan an electrical substation in Airdrie, a city located in north of Calgary, Canada. In this research, three subsets
incorporating one subset of Leica dataset with approximately 1.7 million points and two subsets of the Faro dataset with 587 and 79
thousand points were utilized. The performance of our proposed method is compared with the performance of PCA by performing
check point analysis and investigation of computational speed. Both methods managed to detect a great proportion of planar points
(about 70%). However, the proposed method slightly outperformed PCA. 95% of the points that were segmented by both methods as
planar points did actually lie on a planar surface. This exhibits the high ability of both methods to identify planar points. The results
also indicate that the computational speed of our method is superior to that of PCA by 50%. It is concluded that our proposed
method achieves better results with higher computational speed than PCA in the segmentation of planar surfaces. |
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ISSN: | 1682-1750 2194-9034 |