TABLE I.

The PSNR (dB) and SSIM values obtained by five methods on the testing dataset with simulated phases and added Gaussian noise of varying standard deviation σ. The values are reported as mean ± standard deviation.

Peak signal to noise ratio (dB)
Noise (std)	σ = 0.001	σ = 0.002	σ = 0.003
U-NET	32.15 ± 2.12	29.98 ± 1.19	27.63 ± 0.82
P-MUSE	34.08 ± 2.31	31.68 ± 2.21	29.19 ± 1.84
IRLS-M	38.81 ± 1.98	36.21 ± 1.32	32.43 ± 1.33
K-space	40.02 ± 1.18	36.92 ± 0.96	34.69 ± 1.38
Hybrid	40.59 ± 1.87	37.37 ± 1.56	35.40 ± 1.36
Structural similarity index
U-NET	0.89 ± 0.01	0.82 ± 0.02	0.73 ± 0.03
P-MUSE	0.79 ± 0.03	0.69 ± 0.04	0.63 ± 0.05
IRLS-M	0.88 ± 0.01	0.83 ± 0.01	0.72 ± 0.03
K-space	0.94 ± 0.01	0.89 ± 0.02	0.84 ± 0.03
Hybrid	0.96 ± 0.00	0.94 ± 0.01	0.92 ± 0.01