| Popis: |
High-quality spectral reference libraries are important for algorithm development and identification of diagnostic optical features of target objects in environmental remote sensing applications. We present additional measurements conducted using hyperspectral sensor technologies in a laboratory and outdoor setting to further extend high-quality data as well as diversity in available open-access spectral reference libraries. These observations involved gathering hyperspectral single-pixel point and multi-pixel optical properties of a diverse set of plastic materials (e.g., ropes, nets, packaging, and personal protective equipment). Measurements of COVID-19 personal protective equipment were conducted to also further expand reference datasets that could be useful in monitoring mismanaged waste related to the pandemic. The sample set consisted of virgin polymers and ocean-weathered and artificially biofouled objects of varying apparent colors, shapes, forms, thicknesses, and opacity. A Spectral Evolution spectroradiometer was used to collect hyperspectral reflectance single pixel point information from 280 – 2500 nm. Imaging was also performed using a Specim IQ hyperspectral camera from 400 – 1000 nm. Sampling underwater was completed in intervals of 0.005 m to 0.215 m within a 0.005 – 0.715 m depth range. All optical measurements are available in open-access for the laboratory experiment through https://doi.org/10.4121/769cc482-b104-4927-a94b-b16f6618c3b3 (de Vries and Garaba, 2023) and outdoors campaign involving the biofouling samples via https://doi.org/10.4121/7c53b72a-be97-478b-9288-ff9c850de64b (de Vries et al., 2023). |
