Research Article
Modified Discrete Grey Wolf Optimizer Algorithm for Multilevel Image Thresholding
Table 4
PSNR metrics of MTEMO, DE, ABC, GWO, and MDGWO.
| Image | | MTEMO | DE | ABC | GWO | MDGWO |
| Cameraman | 2 | 13.626 | 12.584 | 13.920 | 14.279 | 14.463 | 3 | 18.803 | 17.584 | 14.462 | 19.696 | 19.934 | 4 | 20.586 | 20.111 | 20.81 | 20.809 | 21.168 | 5 | 20.661 | 21.282 | 22.40 | 22.404 | 23.119 |
| Lena | 2 | 14.672 | 8.823 | 14.590 | 14.680 | 14.716 | 3 | 17.247 | 14.386 | 17.197 | 17.416 | 17.514 | 4 | 18.251 | 16.151 | 18.559 | 19.762 | 20.173 | 5 | 20.019 | 16.720 | 20.321 | 21.299 | 21.820 |
| Baboon | 2 | 16.016 | 8.103 | 16.007 | 16.024 | 16.035 | 3 | 16.016 | 12.596 | 18.592 | 18.632 | 18.634 | 4 | 18.485 | 13.178 | 18.417 | 20.480 | 20.519 | 5 | 20.507 | 13.135 | 20.224 | 22.060 | 22.092 |
| Butterfly | 2 | 11.065 | 8.702 | 14.402 | 14.762 | 14.932 | 3 | 14.176 | 13.028 | 14.504 | 17.873 | 18.553 | 4 | 16.725 | 13.028 | 16.189 | 21.021 | 21.071 | 5 | 19.026 | 14.786 | 19.286 | 21.485 | 22.453 |
| Maize | 2 | 13.633 | 10.549 | 13.590 | 13.950 | 14.040 | 3 | 15.229 | 13.022 | 15.295 | 16.201 | 16.585 | 4 | 16.280 | 14.270 | 16.346 | 18.713 | 18.981 | 5 | 17.211 | 15.079 | 17.046 | 20.410 | 20.879 |
| Sea Star | 2 | 14.398 | 8.610 | 14.395 | 14.809 | 14.885 | 3 | 16.987 | 14.078 | 16.981 | 17.431 | 17.458 | 4 | 18.304 | 16.191 | 18.427 | 19.421 | 19.448 | 5 | 20.165 | 16.474 | 20.330 | 20.887 | 20.968 |
| Smiling Girl | 2 | 13.420 | 14.986 | 13.514 | 17.989 | 18.003 | 3 | 18.254 | 11.243 | 18.069 | 18.742 | 19.114 | 4 | 18.860 | 14.556 | 18.826 | 19.823 | 20.075 | 5 | 19.840 | 22.980 | 19.769 | 21.214 | 21.793 |
| Surfer | 2 | 11.744 | 9.737 | 11.878 | 16.154 | 16.434 | 3 | 18.584 | 11.638 | 18.762 | 18.895 | 18.934 | 4 | 19.478 | 21.866 | 19.647 | 20.234 | 20.721 | 5 | 20.468 | 19.576 | 20.479 | 21.699 | 21.896 |
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