Eliminating the interference of water for direct sensing of submerged plastics using hyperspectral near-infrared imager.

ABSTRACT: Interference from water in the reflectance spectra of plastics is a major obstacle to optical sensing of plastics in aquatic environments. Here we present evidence of the feasibility of sensing plastics in water using hyperspectral near-infrared to shortwave-infrared imaging techniques. We captured hyperspectral images of nine polymers submerged to four depths (2.5-15 mm) in water using a hyperspectral imaging system that utilizes near-infrared to shortwave-infrared light sources. We also developed algorithms to predict the reflectance spectra of each polymer in water using the spectra of the dry plastics and water as independent variables in a multiple linear regression model after a logarithmic transformation. A narrow 1100-1300 nm wavelength range was advantageous for detection of polye

SUBMITTER: Zhu C 

PROVIDER: S-EPMC10558484 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature