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Angular dependance of spectral reflection for different materials

: Kiefer, Pascal M.; Winkelmann, Max


Stein, Karin (Ed.) ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Target and Background Signatures III : 11-14 September 2017, Warsaw, Poland
Bellingham, WA: SPIE, 2017 (Proceedings of SPIE 10432)
Paper 1043203
Conference "Target and Background Signatures" <3, 2017, Warsaw>
Conference Paper
Fraunhofer IOSB ()
background material; vegetation; spectral reflectance; camouflage; NIR; SWIR; BRDF

Parameters like the sun angle as well as the measurement angle mostly are not taken into account when simulating because their influence on the reflectivity is weak. Therefore the impact of a changing measurement and illumination angle on the reflectivity is investigated. Furthermore the impact of humidity and chlorophyll in the scenery is studied by analyzing reflectance spectra of different vegetative background areas. It is shown that the measurement as well as the illumination angle has an important influence on the absolute reflection values which raises the importance of measurements of the bidirectional reflectance distribution function (BRDF).