After drying, samples were taken out of the desiccator for hyperspectral images scanning. Two line-scan reflectance hyperspectral imaging systems were employed in the study. One was performed in visible-near infrared (Vis–NIR) spectral range (400–1000 nm with a spectral resolution of 5 nm), and the other was performed in near infrared (NIR) spectral range (880–1720 nm with a spectral