Table 5. Comparison with light weight state-of-the-art models. We assume the HR image is 720P. The red shows the best while the blue indicates the second-best performance.
Scale | Model | Params | Multi-Adds | Set 5 PSNR/SSIM | Set 14 PSNR/SSIM | B 100 PSNR/SSIM | Urban 100 PSNR/SSIM | Real-number Upscale |
2 | VDSR [4] | 665K | 612.6G | 37.53/0.9587 | 33.03/0.9124 | 31.90/0.8960 | 30.76/0.9140 | No |
LapSRN [34] | 813K | 29.9G | 37.52/0.9590 | 33.08/0.9130 | 31.80/0.8950 | 30.41/0.9100 | No |
MPRNet [31] | 538K | - | 38.08/0.9608 | 33.79/0.9196 | 32.25/0.9004 | 32.52/0.9317 | No |
| EMSR (ours) | 296K | 94.5G | 37.57/0.9588 | 33.16/0.9144 | 31.95/0.8959 | 30.99/0.9162 | Yes |
3 | VDSR [4] | 665K | 612.6G | 33.66/0.9213 | 29.77/0.8314 | 28.82/0.7976 | 27.14/0.8279 | No |
MPRNet [31] | 538K | - | 34.57/0.9285 | 30.42/0.8441 | 29.17/0.8073 | 28.42/0.8578 | No |
| EMSR (ours) | 296K | 61.4G | 33.92/0.9235 | 29.91/0.8370 | 28.89/0.7980 | 27.31/0.8324 | Yes |
| VDSR [4] | 665K | 612.6G | 31.35/0.8838 | 28.01/0.7674 | 27.29/0.7251 | 25.18/0.7524 | No |
4 | LapSRN [34] | 813K | 149.4G | 31.54/0.8850 | 28.19/0.7720 | 27.32/0.7280 | 25.21/0.7560 | No |
| MPRNet [31] | 538K | 31.3G | 32.38/0.8969 | 28.69/0.7841 | 27.63/0.7385 | 26.31/0.7921 | No |
| EMSR (ours) | 296K | 49.9G | 31.59/0.8863 | 28.33/0.7797 | 27.36/0.7267 | 25.38/0.7590 | Yes |