Application of Permutation Entropy in Feature Extraction for Near-Infrared Spectroscopy Noninvasive Blood Glucose Detection

Table 1

Extraction of feature wave bands by PE.

Number	Segment number	Overlapping wavenumber (cm^−1)
1	7, 8, 17, 19	6840–7230, 8680–8880
2	4, 9, 14
3	3, 5
4	4