DR

l = 10

l = 20

l = 40

l = 80

Original

63.64 ± 4.35 (0.5496)

67.32 ± 3.04 (0.5924)

71.81 ± 1.34 (0.6439)

74.75 ± 0.96 (0.6780)

PCA

62.79 ± 3.98 (0.5428)

67.06 ± 2.25 (0.5907)

71.42 ± 1.11 (0.6395)

74.74 ± 0.99 (0.6780)

LDA

30.18 ± 4.39 (0.1737)

58.85 ± 1.72 (0.4885)

70.67 ± 2.04 (0.6284)

77.51 ± 1.46 (0.7101)

LPP

63.95 ± 3.97 (0.5569)

69.04 ± 2.62 (0.6129)

74.03 ± 1.53 (0.6712)

77.49 ± 1.71 (0.7121)

LFDA

40.59 ± 2.69 (0.2862)

65.82 ± 3.04 (0.5744)

67.78 ± 1.80 (0.5961)

68.10 ± 1.25 (0.6002)

SPP

64.45 ± 2.66 (0.5607)

68.16 ± 2.51 (0.6018)

71.89 ± 2.23 (0.6443)

75.01 ± 1.50 (0.6802)

DLSP

60.08 ± 4.71 (0.5433)

66.59 ± 3.01 (0.5840)

69.58 ± 2.66 (0.6177)

72.35 ± 2.02 (0.6496)

DSNPE

63.62 ± 4.36 (0.5494)

67.31 ± 3.05 (0.5923)

71.72 ± 1.37 (0.6428)

74.58 ± 0.94 (0.6761)

S3MPE

63.68 ± 4.45 (0.5502)

67.08 ± 3.21 (0.5897)

71.73 ± 1.33 (0.6434)

75.40 ± 1.12 (0.6861)

SDA

65.69 ± 4.07 (0.5748)

70.18 ± 2.62 (0.6269)

75.94 ± 1.07 (0.6942)

80.54 ± 1.77 (0.7491)

S3MME

72.24 ± 3.78 (0.6523)

81.60 ± 1.91 (0.7619)

84.39 ± 1.98 (0.7968)

86.73 ± 1.21 (0.8267)