Uninformative Biological Variability Elimination in Apple Soluble Solids Content Inspection by Using Fourier Transform Near-Infrared Spectroscopy Combined with Multivariate Analysis and Wavelength Selection Algorithm

Figure 5

The preprocessed spectra by S-G smoothing (a), MSC (b), SNV (c), MeanN (d), combination of S-G smoothing and MSC (e), combination of S-G smoothing and MeanN (f), combination of MSC and MeanN (g), and combination of MSC and SNV (h).

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