Table 10.

Ablation study for the proposed method using retinal images.

Ablation experiment	PSNR (dB) ± std	SSIM ± std
Single scale features extraction	34.5 ± 1.3	0.88 ± 0.15
Remove mini-network	33.10 ± 0.9	0.86 ± 0.21
Remove the absolute difference error loss function	31.04 ± 2.1	0.83 ± 0.14
Proposed method	37.72 ± 3.1	0.91 ± 0.27