SPECTRAL CHARACTERISTICS OF DIFFERENT BUILDING MATERIALS BY THE EYES OF LASER SCANNING
DOI:
https://doi.org/10.51704/cjce.2017.vol3.iss2.pp111-117Klíčová slova:
Material reflectivity, spectrometer, full-waveform terrestrial laser scanner, amplitude, wetnessAbstrakt
During the last few years, terrestrial laser scanning has become a standard method of data acquisition in close range domain. Full-waveform terrestrial laser scanning is a recent technology which is able to digitize and record the complete waveform of the backscattered echo. It gives additional information about the structure and physical backscattering properties of the illuminated surface (reflectance and geometry). In this paper, the influence of different materials on the reflectivity was studied. The factors influencing material reflectivity were: laser wavelength, surface material type, surface colour and wetness. The measurements were focused on the materials used at buildings facades (wood, concrete and plaster). The measurements were performed by full-waveform terrestrial laser scanner (FW - TLS) VZ-400 and spectrometer ASD FieldSpec 4. The aim of this work was to find out what the differences in reflectance spectrum of used material were and whether the materials could be distinguished by their reflectance at 1550 nm (the laser wavelength of VZ-400).
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Reference
CARREA, D., ABELLAN, A., HUMAIR, F., MTASCI, B., DERRON, M.-H., JABIYEDOFF, M., 2016. Correction of terrestrial LiDAR intensity channel using Oren–Nayar reflectance model: An application to lithological differentiation. ISPRS Journal of Photogrammetry and Remote Sensing, 113, pp. 17-29.
KUČEROVÁ, E. Influences of range and incidence angle on measurements of a full - waveform terrestrial laser scanner VZ - 400. Czech Journal of Civil EngineerinG [online]. 2017, 2017(1), 78-83 [cit. 2017-11-10]. ISSN 2336 - 7148.
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ASD Inc., a PANalytical Company: FieldSpec 4 Hi-Res: High Resolution Spectroradiometer [online]. [cit. 2017-11-10]. Accessible from: https://www.asdi.com/products-andservices/fieldspec-spectroradiometers/fieldspec-4-hi-res
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Copyright (c) 2023 Eva Kučerová, Jan Novotný
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