Table 7 Ablation study on loss function components and associated weights on the Flare7K++ real test dataset. Best results are in bold.
Loss Components | Weights (\(\lambda _1, \lambda _2, \lambda _3\)) | PSNR\(\uparrow\) | SSIM\(\uparrow\) | LPIPS\(\downarrow\) | G-PSNR\(\uparrow\) | S-PSNR\(\uparrow\) |
|---|---|---|---|---|---|---|
\(L_\textrm{pixel}\) | (1.0, –, –) | 28.178 | 0.904 | 0.0430 | 24.753 | 23.016 |
\(L_\textrm{pixel} + L_\textrm{percep}\) | (0.5, 0.5, –) | 28.207 | 0.904 | 0.0401 | 24.670 | 23.296 |
\(L_\textrm{pixel} + L_\textrm{percep} + L_\mathrm {MS-SSIM}\) | (0.5, 0.5, 0.5) | 28.105 | 0.894 | 0.0420 | 24.630 | 23.614 |
\(L_\textrm{pixel} + L_\textrm{percep} + L_\mathrm {MS-SSIM}\) (ours) | (0.5, 0.5, 0.2) | 28.352 | 0.907 | 0.0380 | 24.841 | 23.941 |
