Blind source separation in diffuse reflectance NIR spectroscopy using independent component analysis

Near‐infrared (NIR) spectroscopy permits non‐contact analysis of solid samples in the diffuse reflectance (DR) measurement mode. However, uncontrolled physical variations between solid samples, such as changes in packing density and particle size distribution, have a complex nonlinearizing effect on the NIR spectra which complicates the extraction of chemical information from data.

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