Database | LCS | HE | IIA | M_PSO | M_GA | BDPFHE | CLAHE | LLIE | Proposed |
---|---|---|---|---|---|---|---|---|---|
AR | |||||||||
 Image 1 | 1.1916 | 1.0221 | 1.1916 | 1.3521 | 1.3325 | 1.1961 | 1.3123 | 1.1785 | 1.4028 |
 Image 2 | 1.1419 | 1.0174 | 1.1419 | 1.3008 | 1.299 | 1.1939 | 1.267 | 1.1148 | 1.3154 |
 Image 3 | 1.2341 | 1.0914 | 1.2341 | 1.3846 | 1.3868 | 1.2357 | 1.3731 | 1.1828 | 1.4817 |
 Image 4 | 1.2572 | 1.009 | 1.2572 | 1.3702 | 1.3653 | 1.3082 | 1.326 | 1.1349 | 1.497 |
 Image 5 | 1.2301 | 0.9413 | 1.2301 | 1.3332 | 1.3325 | 1.2836 | 1.3289 | 1.1459 | 1.5531 |
 Image 6 | 1.1537 | 0.9486 | 1.1537 | 1.2783 | 1.2784 | 1.1364 | 1.223 | 1.0442 | 1.3613 |
YF | |||||||||
 Image 1 | 0.8143 | 0.6871 | 0.8143 | 0.8565 | 0.8484 | 0.8464 | 0.8161 | 0.7945 | 0.9337 |
 Image 2 | 0.9362 | 0.7971 | 0.9362 | 0.9269 | 0.9316 | 0.9021 | 0.8644 | 0.7126 | 1.0098 |
 Image 3 | 0.9501 | 0.7014 | 0.9501 | 0.8319 | 0.7145 | 0.9362 | 0.8546 | 0.7474 | 0.9629 |
 Image 4 | 1.0383 | 0.8859 | 1.0383 | 0.9645 | 0.9625 | 0.8961 | 0.9274 | 0.7701 | 1.0682 |
 Image 5 | 0.8376 | 0.5986 | 0.8376 | 0.5746 | 0.5739 | 0.7746 | 0.7293 | 0.6559 | 0.7012 |
 Image 6 | 0.8234 | 0.5937 | 0.8234 | 0.7194 | 0.5956 | 0.8285 | 0.7416 | 0.6598 | 0.7355 |
ORL | |||||||||
 Image 1 | 1.2263 | 1.0357 | 1.2263 | 1.4126 | 1.4177 | 1.2354 | 1.3308 | 1.1807 | 1.6019 |
 Image 2 | 1.4101 | 1.2308 | 1.4101 | 1.7742 | 1.7743 | 1.4209 | 1.6695 | 1.4297 | 1.9877 |
 Image 3 | 1.3859 | 1.2339 | 1.3859 | 1.6243 | 1.6227 | 1.3896 | 1.5657 | 1.4284 | 1.8498 |
 Image 4 | 1.3368 | 1.1461 | 1.3368 | 1.5423 | 1.5061 | 1.3421 | 1.5291 | 1.3491 | 1.8439 |
 Image 5 | 1.3324 | 1.3522 | 1.3324 | 1.6258 | 1.6303 | 1.3604 | 1.4815 | 1.3611 | 1.7788 |
 Image 6 | 1.2793 | 1.0655 | 1.2793 | 1.3884 | 1.3985 | 1.2851 | 1.3583 | 1.2924 | 1.6491 |