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Title: | Intensity correction of multispectral airborne laser scanning data | Authors: | Yan, WY | Issue Date: | 2021 | Source: | International Geoscience and Remote Sensing Symposium IGARSS, Brussels, Belgium, 11-16 July 2021, p. 7712-7715 | Abstract: | Correction of the range and angle effects has been proven to be viable to improve the radiometric quality of laser scanning data, regardless of the data collection platform. Existing range normalization (RN) method usually adopts the range to the power of two as a correction factor. Nevertheless, such a setting cannot always guarantee the best improvement of intensity homogeneity, particularly on the recently invented multispectral airborne laser scanner. Therefore, this study aims to propose and intensity correction model for the world's first multispectral airborne laser scanner, Optech Titan. The correction model is built upon the iteratively reweighted least squares, and is able to estimate the correction parameters for the range, scan angle and atmospheric attenuation through using a number of paired closest points from the overlapping data strips. Experimental results show that the correction parameters estimated yielded better than the traditional RN approach with a reduction of coefficient of variation ranging from 2.03-18.35% in channel 1 (1550 nm), 15.56-58.42% in channel 2 (1064 nm), and 2.53-29.8% in channel 3 (532 nm) in six land cover classes. Therefore, intensity correction parameters should be estimated from the overlapping laser scanning data strips, regardless of the laser channel being used. | Keywords: | Intensity correction Land cover Multispectral airborne laser scanning Range Normalization (RN) |
Publisher: | IEEE | ISBN: | 978-1-6654-0369-6 (Electronic) 978-1-6654-0368-9 (USB) 978-1-6654-4762-1 (Print on Demand(PoD)) |
DOI: | 10.1109/IGARSS47720.2021.9553543 | Rights: | © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The following publication W. Y. Yan, "Intensity Correction of Multispectral Airborne Laser Scanning Data," 2021 IEEE International Geoscience and Remote Sensing Symposium IGARSS, 2021, pp. 7712-7715 is available at https://dx.doi.org/10.1109/IGARSS47720.2021.9553543. |
Appears in Collections: | Conference Paper |
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45116 Yan_Multispectral_Airborne_Laser.pdf | Pre-Published version | 5.41 MB | Adobe PDF | View/Open |
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