Table 4.
The PSNR values obtained by each algorithm on different threshold levels
| ID | Algorithm | Threshold level (n) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2-n | 3-n | 4-n | 5-n | 10-n | 20-n | 40-n | 60-n | 80-n | 100-n | ||
| 299091 | IWOA | 12.7506 | 14.7732 | 17.4413 | 19.4405 | 26.649 | 33.2916 | 39.4496 | 42.9397 | 45.4949 | 47.2838 |
| IMPA(Abdel-Basset et al. 2020) | 12.7506 | 14.7732 | 17.4413 | 18.5549 | 26.7035 | 33.3705 | 39.9062 | 42.8988 | 44.9928 | 46.5953 | |
| FFA (Erdmann et al. 2015) | 12.7506 | 14.7732 | 17.5053 | 20.8595 | 27.2694 | 33.0254 | 37.5475 | 40.406 | 42.5489 | 43.7756 | |
| SCA (Mirjalili 2016) | 12.6001 | 14.6274 | 17.5049 | 19.6115 | 25.8008 | 30.2924 | 35.3947 | 38.2696 | 40.6356 | 42.4988 | |
| FPA(Yang 2012) | 12.7343 | 14.6982 | 17.5 | 19.1003 | 26.0155 | 30.5486 | 35.0727 | 38.1241 | 40.4536 | 42.9055 | |
| L-SHADE(Brest et al. 2016) | 12.7018 | 14.3751 | 16.9103 | 19.2296 | 24.4079 | 29.2449 | 34.1894 | 37.4026 | 39.5417 | 41.8211 | |
| SSA (Wang et al. 2020) | 12.7506 | 14.7732 | 17.4821 | 19.3247 | 27.3287 | 32.7439 | 37.8646 | 40.2891 | 42.6772 | 44.775 | |
| EO(Abdel-Basset et al. 2021) | 12.7506 | 14.7732 | 17.4413 | 19.4697 | 27.3109 | 33.5670 | 38.3367 | 41.4319 | 43.7787 | 45.0486 | |
| CSA(Moses et al. 2019) | 12.7343 | 14.7640 | 17.4171 | 19.6498 | 26.1747 | 31.1799 | 36.1748 | 39.0938 | 41.5331 | 43.4786 | |
| 157055 | IWOA | 14.8685 | 16.82 | 18.7981 | 19.4275 | 26.274 | 31.916 | 38.0734 | 41.5321 | 43.9867 | 45.9721 |
| IMPA(Abdel-Basset et al. 2020) | 14.8685 | 16.8202 | 18.8129 | 19.4275 | 26.1992 | 31.9554 | 37.4332 | 40.7193 | 42.6234 | 44.3435 | |
| FFA (Erdmann et al. 2015) | 14.8685 | 16.8252 | 18.827 | 19.4485 | 26.2039 | 31.0721 | 35.6588 | 38.2036 | 40.3306 | 41.8274 | |
| SCA (Mirjalili 2016) | 14.8616 | 16.8316 | 18.7873 | 19.2676 | 25.0025 | 29.7745 | 34.6014 | 37.391 | 39.77 | 41.5039 | |
| FPA(Yang 2012) | 14.8641 | 16.8188 | 18.4205 | 19.3255 | 24.8499 | 29.2591 | 34.2189 | 37.2836 | 39.6526 | 41.4933 | |
| L-SHADE(Brest et al. 2016) | 14.637 | 16.4629 | 17.7539 | 18.7346 | 23.3999 | 28.056 | 33.2929 | 36.4933 | 39.0554 | 40.9173 | |
| SSA (Wang et al. 2020) | 14.8685 | 16.8223 | 18.8185 | 19.4271 | 26.1326 | 31.041 | 35.8873 | 38.0579 | 39.9067 | 41.7728 | |
| EO(Abdel-Basset et al. 2021) | 14.8685 | 16.8190 | 18.8086 | 19.4363 | 26.2407 | 31.2912 | 36.0481 | 38.4696 | 40.5889 | 42.1586 | |
| CSA(Moses et al. 2019) | 14.8652 | 16.8220 | 18.6925 | 19.3459 | 25.3089 | 29.9455 | 34.8648 | 37.8973 | 40.0332 | 41.9029 | |
| 108070 | IWOA | 12.8967 | 14.2363 | 15.7475 | 17.7623 | 25.9934 | 32.5243 | 38.4528 | 41.1617 | 43.6999 | 45.4801 |
| IMPA(Abdel-Basset et al. 2020) | 12.8967 | 14.2363 | 15.7304 | 17.0121 | 25.1283 | 32.5107 | 38.0452 | 40.4146 | 42.2708 | 44.3453 | |
| FFA (Erdmann et al. 2015) | 12.8967 | 14.2363 | 15.833 | 17.8724 | 24.7973 | 32.1232 | 36.7794 | 39.4306 | 41.6915 | 42.5833 | |
| SCA (Mirjalili 2016) | 12.8869 | 14.3027 | 15.5702 | 17.9583 | 24.9282 | 30.1214 | 34.2607 | 37.4506 | 39.7926 | 41.2647 | |
| FPA(Yang 2012) | 12.8965 | 14.2737 | 15.6903 | 17.7294 | 24.9322 | 29.9455 | 35.0972 | 37.6076 | 39.905 | 42.0306 | |
| L-SHADE(Brest et al. 2016) | 12.7868 | 14.1071 | 16.2789 | 17.7593 | 23.7576 | 29.0393 | 33.9972 | 36.9642 | 39.1351 | 41.158 | |
| SSA (Wang et al. 2020) | 12.8967 | 14.2363 | 15.7986 | 17.758 | 24.8294 | 32.3343 | 37.0911 | 39.0282 | 41.5582 | 42.2324 | |
| EO(Abdel-Basset et al. 2021) | 12.8965 | 14.2737 | 15.6903 | 17.7294 | 24.9322 | 29.9455 | 35.0972 | 37.6076 | 39.9050 | 42.0306 | |
| CSA(Moses et al. 2019) | 12.7868 | 14.1071 | 16.2789 | 17.7593 | 23.7576 | 29.0393 | 33.9972 | 36.9642 | 39.1351 | 41.1580 | |
| 108082 | IWOA | 14.5453 | 16.0075 | 17.1678 | 18.0151 | 23.1348 | 31.4783 | 36.7836 | 40.1501 | 42.9475 | 44.8308 |
| IMPA(Abdel-Basset et al. 2020) | 14.5423 | 16.0369 | 17.1311 | 17.8325 | 21.7034 | 30.9698 | 36.2668 | 39.3682 | 41.373 | 43.4287 | |
| FFA (Erdmann et al. 2015) | 14.5423 | 16.0368 | 17.197 | 18.1359 | 22.7504 | 30.7971 | 34.7235 | 38.0501 | 39.706 | 42.2618 | |
| SCA (Mirjalili 2016) | 14.534 | 15.9818 | 17.2315 | 17.9926 | 22.7623 | 29.145 | 33.9605 | 37.0217 | 39.8852 | 41.1458 | |
| FPA(Yang 2012) | 14.5423 | 15.9806 | 17.1285 | 17.924 | 22.792 | 29.495 | 33.6834 | 37.5135 | 39.2886 | 41.6687 | |
| L-SHADE(Brest et al. 2016) | 14.5417 | 16.0231 | 16.9894 | 18.1094 | 22.606 | 27.9576 | 33.2503 | 36.4203 | 38.3674 | 40.6714 | |
| SSA (Wang et al. 2020) | 14.5423 | 16.0259 | 17.196 | 18.1525 | 22.1649 | 31.0065 | 35.359 | 38.3042 | 40.0028 | 41.9553 | |
| EO(Abdel-Basset et al. 2021) | 14.5453 | 16.0369 | 17.1931 | 18.0947 | 23.5194 | 31.0019 | 35.9745 | 39.5162 | 41.5182 | 42.6250 | |
| CSA(Moses et al. 2019) | 14.5489 | 15.9921 | 17.2301 | 18.0076 | 22.2066 | 29.5041 | 34.6427 | 37.7308 | 40.2057 | 42.3192 | |
Bold values indicate the best value