Table 7.
Comparison of Optimal threshold and PSNR value obtained by WOA-DE-Kapur, ABF-Otsu, and CSA-MCET.
| Images | K | Optimal Threshold Value | PSNR | ||||
|---|---|---|---|---|---|---|---|
| WOA-DE-Kapur | ABF-Otsu | CSA-MCET | WOA-DE-Kapur | ABF-Otsu | CSA-MCET | ||
| Slice20 | 2 | 94 167 | 28 97 | 13 84 | 16.8586 | 16.524 | 15.9746 |
| 3 | 9 118 219 | 29 87 151 | 18 64 134 | 23.9008 | 23.1061 | 22.4605 | |
| 4 | 8 29 129 210 | 7 53 100 153 | 16 64 98 147 | 24.6228 | 25.4972 | 24.3967 | |
| 5 | 16 36 94 171 211 | 21 54 98 156 190 | 3 40 61 113 150 | 30.4912 | 27.3411 | 28.5034 | |
| Slice24 | 2 | 111 182 | 48 145 | 19 118 | 19.7345 | 21.0839 | 20.8004 |
| 3 | 34 117 182 | 40 108 172 | 7 56 136 | 23.4428 | 22.9913 | 23.5030 | |
| 4 | 17 73 129 193 | 23 70 118 182 | 6 50 101 161 | 26.7848 | 26.2061 | 24.7095 | |
| 5 | 14 70 115 165 210 | 20 63 102 143 196 | 4 27 66 111 170 | 28.9204 | 28.3318 | 25.3871 | |
| Slice28 | 2 | 114 179 | 52 151 | 20 121 | 19.6991 | 18.6884 | 19.1865 |
| 3 | 20 81 156 | 46 110 175 | 7 56 139 | 24.8983 | 24.3616 | 23.7032 | |
| 4 | 22 78 137 192 | 27 76 126 187 | 6 48 103 161 | 26.9455 | 27.0419 | 25.8075 | |
| 5 | 13 72 117 157 203 | 23 68 109 149 203 | 6 36 74 115 174 | 29.6822 | 29.1884 | 28.1382 | |
| Slice32 | 2 | 115 175 | 53 159 | 20 137 | 23.3496 | 22.888 | 22.6576 |
| 3 | 16 76 143 | 50 120 189 | 8 54 148 | 24.711 | 23.2735 | 25.9537 | |
| 4 | 16 74 131 186 | 21 70 122 191 | 7 52 107 172 | 27.5852 | 27.958 | 27.947 | |
| 5 | 18 71 118 162 205 | 19 63 105 147 206 | 3 28 67 116 180 | 29.7914 | 28.6183 | 29.598 | |
| Rank | — | — | — | 1(10) | 2(4) | 3(2) | |