Table 1.

Statistical parameters of the calibration models for cell density prediction

Model	Data preprocessing (wavelength region)	No. of samples	R 2	RMSECV (cells)	RPD	RMSEP (cells)
1	None	118	93.99	12 700	4.1	19 000
	(1100–1600 nm)
2	None	118	93.76	12 900	4.0	20 900
	(1000–1700 nm)
3	Kennard–Stone algorithm	59	94.02	13 500	4.1	19 800
	(950–1400 nm)
4	Kennard–Stone algorithm	59	94.19	13 300	4.2	14 900
	(950–1350 nm)

Calibration/validation range (total cells): 6 × 10³–2.1 × 10⁵ for all models.