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Geometric Calibration and Radiometric Correction of LiDAR Data and Their Impact on the Quality of Derived Products
Department of Geomatics Engineering, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
Department of Civil Engineering, Ryerson University, 350 Victoria Street, Toronto, Ontario M5B 2K3, Canada
* Author to whom correspondence should be addressed.
Received: 22 June 2011; in revised form: 1 September 2011 / Accepted: 3 September 2011 / Published: 21 September 2011
Abstract: LiDAR (Light Detection And Ranging) systems are capable of providing 3D positional and spectral information (in the utilized spectrum range) of the mapped surface. Due to systematic errors in the system parameters and measurements, LiDAR systems require geometric calibration and radiometric correction of the intensity data in order to maximize the benefit from the collected positional and spectral information. This paper presents a practical approach for the geometric calibration of LiDAR systems and radiometric correction of collected intensity data while investigating their impact on the quality of the derived products. The proposed approach includes the use of a quasi-rigorous geometric calibration and the radar equation for the radiometric correction of intensity data. The proposed quasi-rigorous calibration procedure requires time-tagged point cloud and trajectory position data, which are available to most of the data users. The paper presents a methodology for evaluating the impact of the geometric calibration on the relative and absolute accuracy of the LiDAR point cloud. Furthermore, the impact of the geometric calibration and radiometric correction on land cover classification accuracy is investigated. The feasibility of the proposed methods and their impact on the derived products are demonstrated through experimental results using real data.
Keywords: LiDAR; geometric calibration; radiometric correction
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Habib, A.F.; Kersting, A.P.; Shaker, A.; Yan, W.-Y. Geometric Calibration and Radiometric Correction of LiDAR Data and Their Impact on the Quality of Derived Products. Sensors 2011, 11, 9069-9097.
Habib AF, Kersting AP, Shaker A, Yan W-Y. Geometric Calibration and Radiometric Correction of LiDAR Data and Their Impact on the Quality of Derived Products. Sensors. 2011; 11(9):9069-9097.
Habib, Ayman F.; Kersting, Ana P.; Shaker, Ahmed; Yan, Wai-Yeung. 2011. "Geometric Calibration and Radiometric Correction of LiDAR Data and Their Impact on the Quality of Derived Products." Sensors 11, no. 9: 9069-9097.