Rapid and Nondestructive On-Site Classification Method for Consumer-Grade Plastics Based on Portable NIR Spectrometer and Machine Learning

Figure 4

Confusion matrix for the prediction of transparent samples with the SVM model: (a) SNV-PCA, (b) MSC-PCA, (c) D1-PCA, and (d) SG-PCA (label0: PC; label1: PET; label2: PS; label3: PVC).

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