Table 3.

Comparison of the fidelities of CNN images with four convolutional layers by using three different kernel sizes in the penultimate convolutional layer

Kernel set	3-1-9-3	3-1-5-3	3-1-3-3
RMSE	10.62 ± 4.30	9.09 ± 3.57	8.07 ± 3.10
PSNR [dB]	36.13 ± 1.81	37.43 ± 1.55	38.39 ± 1.48
SSIM	0.994 ± 0.002	0.996 ± 0.002	0.997 ± 0.001