Improved Extended Multiplicative Scatter Correction Algorithm Applied in Blood Glucose Noninvasive Measurement with FT-IR Spectroscopy

Table 1

Prediction results of the test set with different preprocessing methods.

Preprocessing method	Principal components; number	Root mean square error of prediction; (RMSEP mg/dL)	Correlation coefficient; (R)
Original	9	9.3	0.86
Im-EMSC	8	8.8	0.95
EMSC	11	15.1	0.85
MSC	5	26.8	0.34