Table 8.
Summary of Friedman ranking test for the methods of PSNR for the NORMAL experiment
| PSNR_rank | AO | WOA | SSA | RSA-SSA | RSA | MPA | PSO |
|---|---|---|---|---|---|---|---|
| NORMAL1 | 3 | 1 | 2 | 1 | 4 | 6 | 5 |
| NORMAL2 | 2 | 3 | 6 | 1 | 4 | 5 | 3 |
| NORMAL3 | 3 | 4 | 7 | 1 | 6 | 5 | 2 |
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