Variable Selection from Image Texture Feature for Automatic Classification of Concrete Surface Voids

Table 1

Prediction result comparison on the independent testing sets.

Method	Proposed method on 20 selected variables		Proposed method on 108 variables		L-SHADE-SVM-SVD on 108 variables
	Mean	Std.	Mean	Std.	Mean	Std.
Acc	0.919	0.026	0.929	0.025	0.926	0.018
Precision	0.904	0.044	0.922	0.042	0.922	0.025
Recall	0.938	0.034	0.937	0.029	0.932	0.037
F1 measure	0.920	0.027	0.929	0.027	0.926	0.018