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Remote Sens. 2015, 7(5), 6336-6357; doi:10.3390/rs70506336

Empirical Radiometric Normalization of Road Points from Terrestrial Mobile Lidar System

Department of Civil Engineering, National Chiao Tung University, Hsinchu 30010, Taiwan
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Author to whom correspondence should be addressed.
Academic Editors: Juha Hyyppä and Prasad S. Thenkabail
Received: 12 February 2015 / Revised: 1 May 2015 / Accepted: 18 May 2015 / Published: 21 May 2015
(This article belongs to the Special Issue Lidar/Laser Scanning in Urban Environments)
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Abstract

Lidar data provide both geometric and radiometric information. Radiometric information is influenced by sensor and target factors and should be calibrated to obtain consistent energy responses. The radiometric correction of airborne lidar system (ALS) converts the amplitude into a backscatter cross-section with physical meaning value by applying a model-driven approach. The radiometric correction of terrestrial mobile lidar system (MLS) is a challenging task because it does not completely follow the inverse square range function at near-range. This study proposed a radiometric normalization workflow for MLS using a data-driven approach. The scope of this study is to normalize amplitude of road points for road surface classification, assuming that road points from different scanners or strips should have similar responses in overlapped areas. The normalization parameters for range effect were obtained from crossroads. The experiment showed that the amplitude difference between scanners and strips decreased after radiometric normalization and improved the accuracy of road surface classification. View Full-Text
Keywords: MLS; radiometric normalization; data driven; amplitude; road surface classification MLS; radiometric normalization; data driven; amplitude; road surface classification
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Teo, T.-A.; Yu, H.-L. Empirical Radiometric Normalization of Road Points from Terrestrial Mobile Lidar System. Remote Sens. 2015, 7, 6336-6357.

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