Table 2 Averaged ISNR of restored images with several noise levels with BLUR2

${\sigma }_L^2=\mathsf{\text{0}}\mathsf{\text{.308}}$

${\sigma }_M^2=\mathsf{\text{2}}$

${\sigma }_H^2=\mathsf{\text{8}}$

3.07 ± 0.00

2.30 ± 0.00

1.72 ± 0.01

0.05 ± 0.03

0.69 ± 0.03

0.83 ± 0.02

4.21 ± 0.01

3.27 ± 0.02

2.63 ± 0.02

4.33 ± 0.01

3.46 ± 0.01

2.79 ± 0.01

-0.48 ± 0.04

-0.26 ± 0.05

-0.09 ± 0.05

5.14 ± 0.03

4.18 ± 0.02

3.68 ± 0.02

2.77 ± 0.00

1.97 ± 0.00

1.43 ± 0.01

2.67 ± 0.02

2.30 ± 0.02

2.02 ± 0.03

4.51 ± 0.02

3.83 ± 0.02

3.35 ± 0.02