Christina Grönwall, Ove Steinvall, Benjamin Göhler, and Dominique Hamoir, "Active and passive imaging of clothes in the NIR and SWIR regions for reflectivity analysis," Appl. Opt. 55, 5292-5303 (2016)
We perform statistical analysis of data from active and passive imaging sensors in the near infrared (NIR) and short wavelength infrared (SWIR) wavelength bands. The data were obtained from measurements performed on clothing in a field campaign and in the laboratory. We show that reflectivity data from active imaging can be fitted to Gaussian functions, although earlier theory proposes gamma–gamma functions. We analyze the reflectivity data collected during the field campaign and compare that data with data obtained in the laboratory. We focus on the added value of active imaging when combined with passive imaging to distinguish different clothes for friend/foe identification.
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