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Automated extraction of manhole covers using mobile LiDAR data
- Guan, Haiyan, Yu, Yongtao, Li, Jonathan, Liu, Pengfei, Zhao, Haohao, Wang, Cheng
- Remote sensing letters 2014 v.5 no.12 pp. 1042-1050
- data analysis, lidar, remote sensing, roads
- Our work addresses the problem of accurately extracting manhole covers, one specific type of road fixture, from a large volume of mobile light detection and ranging (LiDAR) data. We propose an efficient, step-wise manhole cover extraction method. First, road surface points are extracted and interpolated to generate two-dimensional geo-referenced feature (GRF) images. Next, the method segments manhole cover candidates by applying distance-dependent thresholding and multi-scale tensor voting to the GRF images. Finally, distance-based clustering and a morphological operation are used to extract manhole covers. Experiments were carried out to qualitatively and quantitatively demonstrate the performance of our manhole cover extraction method.