Table 2.

Comparison of the fidelities of CNN images with three different kernel sizes in the first convolutional layer

Kernel size	9 × 9	5 × 5	3 × 3
RMSE	9.94 ± 3.97	8.13 ± 3.12	7.07 ± 2.59
PSNR [dB]	36.69 ± 1.66	38.33 ± 1.44	39.41 ± 1.37
SSIM	0.995 ± 0.002	0.997 ± 0.001	0.998 ± 0.001