Table 3.

Overall accuracy of each method with optimal parameters.

Method	Overall accuracy	Optimal parameter
SR1	96.1%	Patch size: 4 × 4 × 4, number of atoms: 2000, sparsity: 8, C: 0.5
SR2	95.6%	Patch size: 5 × 5 × 5, number of atoms: 2000, sparsity: 2, C: 0.25
SR3	96.4%	Patch size: 3 × 3 × 3, number of atoms: 3000, sparsity: 2, C: 16
SDF	75.8%	Number of hidden units: 10
CSE	65.1%	Number of clusters: 25
BOW	85.5%	Patch size: 3 × 3 × 3, number of atoms: 300, g: 1.0, C: 4.0