Table 4. Ablation study on the degree of the positional encoding.

PSNR ↑ SSIM ↑
N = 0 33.903 ± 5.921 0.954 ± 0.058
N = 4 34.006 ± 6.006 0.956 ± 0.057
N = 8 33.958 ± 6.052 0.955 ± 0.058