Integrating the Symmetry Image and Improved Sparse Representation for Railway Fastener Classification and Defect Recognition

Table 4

Comparison of recall rate and mean CPU time with different number of candidate samples.

Method	SRC	SRC-KNS
		CPU time (s)	1.606	0.314	0.336	0.387	0.462	0.605	0.839
Recall rate (%)	87.3	97.8	98.8	95.3	91.8	88.3	87.8