Table 2 The recall results of different combinations of wavelet-based features
Set | Wavelet features selected | Average recall using ED (%) | Average recall using MD (%) | Number of features | Wavelet decomposition level(s) |
|---|---|---|---|---|---|
#1 | All features | 88.82 | 89.86 | 37 | 5 |
#2 | Entropy of level 2 Energy of level 1 Energy Ratio of level 2 & 1 Centroid of level 1 | 85.70 | 87.09 | 4 | 2 |
#3 | Entropy of level 2 Energy of level 1 Energy Ratio of level 2 & 1 | 85.38 | 84.86 | 3 | 2 |
#4 | STD of level 1 Energy of level 1 Entropy of level 1 | 86.04 | 86.87 | 3 | 1 |
#5 | Energy of level 1 Entropy of level 1 | 86.08 | 85.59 | 2 | 1 |
#6 | STD of level 1 Energy of level 1 | 85.03 | 85.44 | 2 | 1 |
#7 | STD of level 1 Entropy of level 1 | 85.52 | 85.21 | 2 | 1 |