Table 4.
SSIM of COVID and NORMAL cases images
| K | AO | WOA | SSA | RSA-SSA | RSA | MPA | PSO | ||
|---|---|---|---|---|---|---|---|---|---|
| COVID-1 | 2 | MEAN | 0.42965 | 0.40297 | 0.376196 | 0.45871 | 0.40297 | 0.444653 | 0.460506 |
| STD | 0.03405 | 0.05994 | 0.03036 | 0.01114 | 0.059947 | 0.023983 | 0.024026 | ||
| 3 | MEAN | 0.49806 | 0.44377 | 0.53224 | 0.41162 | 0.443777 | 0.395412 | 0.467073 | |
| STD | 0.00533 | 0.0407 | 0.07087 | 0.10924 | 0.040703 | 0.04514 | 0.015658 | ||
| 4 | MEAN | 0.46394 | 0.50754 | 0.53656 | 0.46277 | 0.507542 | 0.475494 | 0.533161 | |
| STD | 0.0213 | 0.01404 | 0.03246 | 0.0421 | 0.014043 | 0.021184 | 0.05675 | ||
| 5 | MEAN | 0.5298 | 0.5217 | 0.5346 | 0.50467 | 0.52172 | 0.561966 | 0.555674 | |
| STD | 0.03282 | 0.04483 | 0.02549 | 0.07967 | 0.044831 | 0.048949 | 0.046626 | ||
| 6 | MEAN | 0.54274 | 0.58835 | 0.55735 | 0.62441 | 0.588358 | 0.576641 | 0.591855 | |
| STD | 0.05497 | 0.03155 | 0.0859 | 0.091 | 0.0314 | 0.052018 | 0.019438 | ||
| COVID-2 | 2 | MEAN | 0.50924 | 0.42224 | 0.42558 | 0.37087 | 0.422248 | 0.360834 | 0.439632 |
| STD | 0.01713 | 0.06783 | 0.05705 | 0.09721 | 0.067832 | 0.134443 | 0.073197 | ||
| 3 | MEAN | 0.48167 | 0.41479 | 0.51593 | 0.45614 | 0.414796 | 0.460597 | 0.418115 | |
| STD | 0.08559 | 0.0175 | 0.07921 | 0.08515 | 0.01758 | 0.089635 | 0.056822 | ||
| 4 | MEAN | 0.52968 | 0.54112 | 0.49385 | 0.52068 | 0.541124 | 0.546894 | 0.480378 | |
| STD | 0.12498 | 0.03782 | 0.1051 | 0.01472 | 0.037822 | 0.017256 | 0.063804 | ||
| 5 | MEAN | 0.58313 | 0.6066 | 0.55032 | 0.62619 | 0.60667 | 0.586562 | 0.535726 | |
| STD | 0.08215 | 0.02334 | 0.08076 | 0.00756 | 0.023342 | 0.004549 | 0.052696 | ||
| 6 | MEAN | 0.57667 | 0.62786 | 0.56212 | 0.62452 | 0.627816 | 0.646609 | 0.597459 | |
| STD | 0.00633 | 0.02681 | 0.08871 | 0.02341 | 0.026981 | 0.032317 | 0.066562 | ||
| COVID-3 | 2 | MEAN | 0.373967 | 0.339013 | 0.495861 | 0.512224 | 0.339003 | 0.56946 | 0.450022 |
| STD | 0.142947 | 0.091252 | 0.080724 | 0.016876 | 0.091282 | 0.062944 | 0.080966 | ||
| 3 | MEAN | 0.530732 | 0.551748 | 0.610586 | 0.280487 | 0.551768 | 0.455782 | 0.558857 | |
| STD | 0.125136 | 0.022145 | 0.029913 | 0.08828 | 0.022165 | 0.027358 | 0.124729 | ||
| 4 | MEAN | 0.437222 | 0.465512 | 0.523524 | 0.601395 | 0.465522 | 0.531071 | 0.585213 | |
| STD | 0.324238 | 0.031438 | 0.049375 | 0.029156 | 0.031428 | 0.156657 | 0.104579 | ||
| 5 | MEAN | 0.636554 | 0.589412 | 0.519042 | 0.563354 | 0.589412 | 0.672963 | 0.601557 | |
| STD | 0.062811 | 0.010422 | 0.172 | 0.081168 | 0.010432 | 0.027416 | 0.023636 | ||
| 6 | MEAN | 0.688038 | 0.602256 | 0.63167 | 0.552424 | 0.602256 | 0.635441 | 0.565898 | |
| STD | 0.022429 | 0.080002 | 0.073866 | 0.096402 | 0.080002 | 0.03781 | 0.100983 | ||
| NORMAL-1 | 2 | MEAN | 0.377072 | 0.433945 | 0.425974 | 0.448437 | 0.60622 | 0.439367 | 0.45975 |
| STD | 0.146139 | 0.084738 | 0.05663 | 0.082113 | 0.059084 | 0.072743 | 0.040375 | ||
| 3 | MEAN | 0.487931 | 0.495169 | 0.466183 | 0.461924 | 0.675019 | 0.350841 | 0.485511 | |
| STD | 0.052161 | 0.090261 | 0.09588 | 0.028882 | 0.031402 | 0.186978 | 0.069474 | ||
| 4 | MEAN | 0.449308 | 0.497662 | 0.500883 | 0.494075 | 0.63306 | 0.43292 | 0.405417 | |
| STD | 0.069547 | 0.053722 | 0.040597 | 0.13073 | 0.03235 | 0.074601 | 0.032333 | ||
| 5 | MEAN | 0.622331 | 0.586756 | 0.527278 | 0.454854 | 0.694551 | 0.575692 | 0.406074 | |
| STD | 0.014378 | 0.043584 | 0.078913 | 0.04693 | 0.054632 | 0.068585 | 0.225934 | ||
| 6 | MEAN | 0.521997 | 0.582859 | 0.549776 | 0.506106 | 0.661963 | 0.426425 | 0.46821 | |
| STD | 0.060609 | 0.03107 | 0.088384 | 0.125498 | 0.077946 | 0.160948 | 0.194706 | ||
| NORMAL-2 | 2 | MEAN | 0.440137 | 0.443875 | 0.448085 | 0.380422 | 0.433945 | 0.425825 | 0.361047 |
| STD | 0.108188 | 0.064598 | 0.031175 | 0.042702 | 0.084738 | 0.041938 | 0.024426 | ||
| 3 | MEAN | 0.478387 | 0.499265 | 0.441933 | 0.506195 | 0.495169 | 0.518201 | 0.507956 | |
| STD | 0.071283 | 0.042977 | 0.040663 | 0.03042 | 0.090261 | 0.041512 | 0.050541 | ||
| 4 | MEAN | 0.457856 | 0.585825 | 0.600818 | 0.497838 | 0.497662 | 0.574744 | 0.507555 | |
| STD | 0.029951 | 0.044236 | 0.048041 | 0.062741 | 0.053722 | 0.017915 | 0.06425 | ||
| 5 | MEAN | 0.637749 | 0.590795 | 0.571383 | 0.554001 | 0.586756 | 0.58265 | 0.578656 | |
| STD | 0.010376 | 0.081043 | 0.081152 | 0.04878 | 0.043584 | 0.044166 | 0.042985 | ||
| 6 | MEAN | 0.620989 | 0.610829 | 0.657615 | 0.554396 | 0.582859 | 0.579489 | 0.577239 | |
| STD | 0.080172 | 0.021174 | 0.094464 | 0.080524 | 0.03107 | 0.042093 | 0.075686 | ||
| NORMAL-3 | 2 | MEAN | 0.579632 | 0.525593 | 0.470218 | 0.496973 | 0.443875 | 0.528933 | 0.55688 |
| STD | 0.067865 | 0.084187 | 0.209488 | 0.121069 | 0.064598 | 0.144974 | 0.043189 | ||
| 3 | MEAN | 0.659135 | 0.637236 | 0.659628 | 0.671445 | 0.499265 | 0.578848 | 0.623327 | |
| STD | 0.043666 | 0.017713 | 0.0457 | 0.090691 | 0.042977 | 0.125382 | 0.065171 | ||
| 4 | MEAN | 0.727387 | 0.723672 | 0.70059 | 0.724118 | 0.585825 | 0.660755 | 0.688485 | |
| STD | 0.051295 | 0.035443 | 0.012628 | 0.049346 | 0.044236 | 0.089128 | 0.021552 | ||
| 5 | MEAN | 0.671559 | 0.666467 | 0.750507 | 0.702174 | 0.590795 | 0.701738 | 0.693761 | |
| STD | 0.088484 | 0.039542 | 0.046332 | 0.044752 | 0.081043 | 0.059367 | 0.068361 | ||
| 6 | MEAN | 0.746381 | 0.745939 | 0.749069 | 0.726662 | 0.610829 | 0.750085 | 0.745973 | |
| STD | 0.022251 | 0.073073 | 0.061598 | 0.055838 | 0.021174 | 0.024152 | 0.016091 |