Classification and Change Detection in Mobile Mapping LiDAR Point Clouds

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Voelsen, M.; Schachtschneider, J.; Brenner, C.: Classification and Change Detection in Mobile Mapping LiDAR Point Clouds. In: Journal of photogrammetry, remote sensing and geoinformation science : PFG : Photogrammetrie, Fernerkundung, Geoinformation 89 (2021), Nr. 3, S. 195-207. DOI: https://doi.org/10.1007/s41064-021-00148-x

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To cite the version in the repository, please use this identifier: https://doi.org/10.15488/13828

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Sum total of downloads: 33




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Abstract: 
Creating 3D models of the static environment is an important task for the advancement of driver assistance systems and autonomous driving. In this work, a static reference map is created from a Mobile Mapping “light detection and ranging” (LiDAR) dataset. The data was obtained in 14 measurement runs from March to October 2017 in Hannover and consists in total of about 15 billion points. The point cloud data are first segmented by region growing and then processed by a random forest classification, which divides the segments into the five static classes (“facade”, “pole”, “fence”, “traffic sign”, and “vegetation”) and three dynamic classes (“vehicle”, “bicycle”, “person”) with an overall accuracy of 94%. All static objects are entered into a voxel grid, to compare different measurement epochs directly. In the next step, the classified voxels are combined with the result of a visibility analysis. Therefore, we use a ray tracing algorithm to detect traversed voxels and differentiate between empty space and occlusion. Each voxel is classified as suitable for the static reference map or not by its object class and its occupation state during different epochs. Thereby, we avoid to eliminate static voxels which were occluded in some of the measurement runs (e.g. parts of a building occluded by a tree). However, segments that are only temporarily present and connected to static objects, such as scaffolds or awnings on buildings, are not included in the reference map. Overall, the combination of the classification with the subsequent entry of the classes into a voxel grid provides good and useful results that can be updated by including new measurement data.
License of this version: CC BY 4.0 Unported
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2021
Appears in Collections:Fakultät für Bauingenieurwesen und Geodäsie

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pos. country downloads
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1 image of flag of Russian Federation Russian Federation 12 36.36%
2 image of flag of Germany Germany 10 30.30%
3 image of flag of United States United States 8 24.24%
4 image of flag of Netherlands Netherlands 1 3.03%
5 image of flag of Japan Japan 1 3.03%
6 image of flag of Belgium Belgium 1 3.03%

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