| Index Test image | EME | |||
| Original image | Histogram equalization | Three-Gaussian | Adaptive three-Gaussian | |
| Lenna | 22.9578 | 55.8410 | 74.2137 | 91.6041 |
| Goldhill | 16.2290 | 40.3469 | 67.6001 | 130.0269 |
| Sailboat | 23.2728 | 40.4264 | 81.2151 | 135.1900 |
| Zelda | 17.1172 | 55.7354 | 67.2700 | 94.1577 |