Table 3: Estimated noise levels for the real projection data.

Figure 3(c)(d)
Real SDPMW [18]FE [17]PMW [18]FE [17]

55.30 5.226.12*5.015.075.83*
66.236.187.08*6.216.056.80*
77.177.188.04*7.117.037.77*
88.128.169.01*8.068.018.75*
99.089.1410.00*9.048.999.73*
1010.0410.1410.97*10.009.9910.71*
1111.2511.1311.95*11.09 10.9711.70*
1212.1512.1212.93*12.0811.9512.69*
1313.1013.1113.92*13.0412.9313.68*
1414.0314.1114.91*13.9913.9114.67*
1515.0915.1115.90*14.9814.9215.66*