ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., III-1, 41-47, 2016
http://www.isprs-ann-photogramm-remote-sens-spatial-inf-sci.net/III-1/41/2016/
doi:10.5194/isprs-annals-III-1-41-2016
 
01 Jun 2016
QUALITY ANALYSIS AND CORRECTION OF MOBILE BACKPACK LASER SCANNING DATA
P. Rönnholm1,2, X. Liang2, A. Kukko1,2, A. Jaakkola2, and J. Hyyppä2 1Aalto University, Department of Built Environment, P.O. Box 15800, 00076 Aalto, Finland
2Finnish Geospatial Research Institute, FGI, National Land Survey of Finland, Helsinki, Finland
Keywords: backpack laser scanning, UAV laser scanning, registration, quality, data correction Abstract. Backpack laser scanning systems have emerged recently enabling fast data collection and flexibility to make measurements also in areas that cannot be reached with, for example, vehicle-based laser scanners. Backpack laser scanning systems have been developed both for indoor and outdoor use. We have developed a quality analysis process in which the quality of backpack laser scanning data is evaluated in the forest environment. The reference data was collected with an unmanned aerial vehicle (UAV) laser scanning system. The workflow included noise filtering, division of data into smaller patches, ground point extraction, ground data decimation, and ICP registration. As a result, we managed to observe the misalignments of backpack laser scanning data for 97 patches each including data from circa 10 seconds period of time. This evaluation revealed initial average misalignments of 0.227 m, 0.073 and -0.083 in the easting, northing and elevation directions, respectively. Furthermore, backpack data was corrected according to the ICP registration results. Our correction algorithm utilized the time-based linear transformation of backpack laser scanning point clouds. After the correction of data, the ICP registration was run again. This revealed remaining misalignments between the corrected backpack laser scanning data and the original UAV data. We found average misalignments of 0.084, 0.020 and -0.005 meters in the easting, northing and elevation directions, respectively.
Conference paper (PDF, 1682 KB)


Citation: Rönnholm, P., Liang, X., Kukko, A., Jaakkola, A., and Hyyppä, J.: QUALITY ANALYSIS AND CORRECTION OF MOBILE BACKPACK LASER SCANNING DATA, ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci., III-1, 41-47, doi:10.5194/isprs-annals-III-1-41-2016, 2016.

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