International Scholarly Research Notices / 2013 / Article / Fig 2

Research Article

Near-Infrared Spectroscopy for Anticounterfeiting Innovative Fibers

Figure 2

(a) Selected NIR spectra region between 7100 and 9100 cm−1 for PCA analysis and (b) score plot from PCA analysis of PLA, Kevlar (KA), Spandex (SP), and Sorona (SO) fibers after transformation, SNV, and 2nd Savitzky-Golay derivative.