Texture Feature Extraction and Classification of SEM Images of Wheat Straw/Polypropylene Composites in Accelerated Aging Test

Table 2

Sensitivity and 1 − specificity values of classification model using ELM.

Image sample	Sensitivity		1 − specificity
	Calibration	Cross validation	Calibration	Cross validation
Class 1	1.000	1.000	0	0
Class 2	0.938	0.688	0	0.016
Class 3	0.938	0.813	0.016	0.031
Class 4	0.938	0.875	0.016	0.109
Class 5	1.000	0.938	0	0