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Table 2 Experimental results compared with PCA + SVM, KPCA + SVM

From: Kernel PCA feature extraction and the SVM classification algorithm for multiple-status, through-wall, human being detection

Classification algorithm parameters

PCA + SVM

KPCA + SVM

Correctly classified instances

633

79.125%

654

81.75%

Incorrectly classified instances

167

20.875

146

18.25%

Kappa statistic

0.7217

0.7567

Mean absolute error

0.2827

0.2794

Root mean squared error

0.3604

0.3558

Relative absolute error

75.3889%

74.5%

Root relative squared error

83.2388%

82.1584%

Total number of instances

800

800

  1. KPCA kernel principal component analysis, PCA principal component analysis, SVM support vector machine