Table 4. The PSNR(dB)/SSIM/R results of the MIP enface angiogram with different improvement schemes (The best results are highlighted).

	U-Net	$\text{U-Net}+{\mathrm{L}}_1$	U-Net + Augmentation	U-Net + Phase
	PSNR	20.00	20.27	20.34	$\mathbf{\text{21.30}}$
SSIM	0.714	0.717	0.722	$\mathbf{\text{0.750}}$
R	0.929	0.930	0.931	$\mathbf{\text{0.938}}$