Table 4. The classification results of the polynomial SVM with different degrees in the optimal parameters (C = 2.828, γ = 0.088).

Samples	Sample Numbers	Identification rate of polynomial classifiers in different degree
		3	4	5	6	7	8	9	10
Sect. Furfuracea	5	100%	100%	100%	100%	100%	100%	100%	100%
Sect. Paracamellia	8	100%	87.50%	87.50%	87.50%	75.00%	75.00%	87.50%	87.50%
Sect. Tuberculata	6	83.33%	83.33%	83.33%	83.33%	83.33%	83.33%	66.67%	66.67%
Sect. Camellia	16	93.75%	93.75%	93.75%	93.75%	87.50%	81.25%	75.00%	68.75%
Sect. Theopsis	10	100%	100%	100%	100%	100%	100%	100%	100%
Total accuracy (%)		95.56%	93.33%	93.33%	93.33%	88.89%	86.67%	84.44%	82.22%