Table 8.
Comparison between MRFO-OBL and all other algorithms according to the PSNR mean values
| Test image | nTh | MFO | WOA | SCA | SSA | EO | MRFO | MRFO-OBL |
|---|---|---|---|---|---|---|---|---|
| CT-image1 | 7 | 22.7852 | 22.7217 | 20.4506 | 22.7112 | 22.8869 | 22.7883 | 22.8366 |
| 8 | 23.6051 | 23.6016 | 21.4088 | 23.5316 | 23.6355 | 23.5724 | 23.6096 | |
| 9 | 24.3834 | 24.3157 | 22.0108 | 24.3711 | 24.5068 | 24.4058 | 24.4777 | |
| 10 | 24.9569 | 24.9986 | 22.7393 | 24.9413 | 25.2453 | 25.0747 | 25.0750 | |
| CT-image2 | 7 | 23.3401 | 23.2898 | 21.0569 | 23.3548 | 23.3451 | 23.3543 | 23.3691 |
| 8 | 24.2526 | 24.2280 | 22.2538 | 24.2437 | 24.2915 | 24.2500 | 24.2945 | |
| 9 | 25.1918 | 25.1816 | 22.4196 | 25.1842 | 25.1998 | 25.2425 | 25.2675 | |
| 10 | 25.9299 | 25.9645 | 22.6362 | 25.9269 | 26.0340 | 25.9906 | 26.0447 | |
| CT-image3 | 7 | 23.3127 | 23.3402 | 20.7045 | 23.3244 | 23.3664 | 23.3779 | 23.3835 |
| 8 | 24.2557 | 24.2363 | 21.5903 | 24.2289 | 24.2585 | 24.2597 | 24.2920 | |
| 9 | 25.2191 | 25.0960 | 22.4194 | 25.1901 | 25.1978 | 25.2401 | 25.2815 | |
| 10 | 25.9385 | 25.9699 | 23.0266 | 25.9578 | 26.0504 | 26.0143 | 26.0406 | |
| CT-image4 | 7 | 23.1153 | 22.9441 | 21.0348 | 23.0054 | 23.0594 | 23.0455 | 23.1315 |
| 8 | 24.1451 | 24.1102 | 21.4647 | 24.1141 | 24.1073 | 24.1247 | 24.1701 | |
| 9 | 25.2197 | 25.1061 | 22.2991 | 25.2064 | 25.1943 | 25.2826 | 25.3379 | |
| 10 | 26.0147 | 25.9803 | 22.7990 | 25.9808 | 26.1555 | 26.0265 | 26.0860 | |
| CT-image5 | 7 | 17.7297 | 18.0911 | 17.3997 | 17.8317 | 17.7346 | 17.6816 | 17.6923 |
| 8 | 18.0694 | 18.6874 | 17.1534 | 18.3007 | 18.1689 | 18.0973 | 18.1808 | |
| 9 | 18.4704 | 19.4253 | 18.0159 | 19.0553 | 18.6530 | 18.4984 | 18.6158 | |
| 10 | 18.8423 | 20.3143 | 18.2669 | 19.1845 | 19.3208 | 18.9574 | 19.0474 | |
| CT-image6 | 7 | 21.1169 | 21.0827 | 19.8469 | 21.0500 | 21.1999 | 21.0786 | 21.1912 |
| 8 | 22.0606 | 22.1863 | 20.3460 | 22.1110 | 22.2209 | 22.2276 | 22.2106 | |
| 9 | 22.9744 | 22.7802 | 20.8418 | 23.0122 | 23.0780 | 22.9386 | 23.0090 | |
| 10 | 23.4674 | 23.4204 | 22.0136 | 23.7771 | 23.8257 | 23.5627 | 23.6860 | |
| CT-image7 | 7 | 19.6031 | 19.3921 | 18.3899 | 19.4554 | 19.7201 | 19.4133 | 19.6895 |
| 8 | 20.6718 | 20.3370 | 18.5243 | 20.6694 | 20.8207 | 20.7551 | 20.7020 | |
| 9 | 21.5069 | 21.4917 | 19.9200 | 21.5961 | 21.8813 | 21.4188 | 21.8512 | |
| 10 | 22.4764 | 22.9517 | 20.4139 | 22.1888 | 22.8390 | 22.6882 | 22.9905 | |
| CT-image8 | 7 | 24.1907 | 24.1384 | 22.3768 | 24.1360 | 24.3791 | 24.0661 | 24.1512 |
| 8 | 25.6295 | 25.5060 | 23.0455 | 25.3830 | 25.8864 | 25.4969 | 25.6688 | |
| 9 | 27.0029 | 27.0489 | 23.5396 | 27.1684 | 26.9507 | 27.0617 | 27.0500 | |
| 10 | 27.8852 | 27.8808 | 24.2742 | 27.9904 | 27.9053 | 27.9826 | 27.9897 | |
| CT-image9 | 7 | 21.7801 | 21.6394 | 20.3303 | 21.7302 | 21.8315 | 21.7791 | 21.7893 |
| 8 | 22.6114 | 22.4253 | 21.0667 | 22.4741 | 22.7819 | 22.5405 | 22.6872 | |
| 9 | 23.6409 | 23.5144 | 21.5845 | 23.4062 | 24.0351 | 23.6402 | 23.7957 | |
| 10 | 24.6765 | 24.1344 | 21.9324 | 24.5486 | 25.0857 | 24.7814 | 25.0439 | |
| CT-image10 | 7 | 20.5813 | 20.3124 | 19.4163 | 20.4473 | 20.6924 | 20.4594 | 20.6069 |
| 8 | 21.9369 | 21.6074 | 20.4364 | 21.9044 | 22.1685 | 22.0541 | 22.1712 | |
| 9 | 22.9325 | 22.9381 | 20.8123 | 23.0184 | 23.0016 | 23.0701 | 23.0850 | |
| 10 | 23.4817 | 23.8029 | 22.0695 | 23.6455 | 23.7193 | 23.5813 | 23.6204 |