Table 2.

Parameters of U-Net architecture (k: kernel size, c: channel number).

Layer	Down-sampling	Layer	Up-sampling
Conv1	k (3 × 3)/c (64)	Upsampling1	k (2 × 2)
Conv2	k (3 × 3)/c (64)	Conv11	k (3 × 3)/c (512)
Dropout1	0.5	Conv12	k (3 × 3)/c (512)
Maxpool1	k (2 × 2)	Dropout5	0.5
Conv3	k (3 × 3)/c (128))	Upsampling2	k (2 × 2)
Conv4	k (3 × 3)/c (128))	Conv13	k (3 × 3)/c (256)
Dropout2	0.5	Conv14	k (3 × 3)/c (256)
Maxpool2	k (2 × 2)	Dropout6	0.5
Conv5	k (3 × 3)/c (256)	Upsampling3	k (2 × 2)
Conv6	k (3 × 3)/c (256)	Conv15	k (3 × 3)/c (128)
Dropout3	0.5	Conv16	k (3 × 3)/c (128)
Maxpool3	k (2 × 2)	Dropout7	0.5
Conv7	k (3 × 3)/c (512)	Upsampling4	k (2 × 2)
Conv8	k (3 × 3)/c (512)	Conv17	k (3 × 3)/c (64)
Dropout4	0.5	Conv18	k (3 × 3)/c (64)
Maxpool4	k (2 × 2)	Dropout8	0.5
Conv9	k (3 × 3)/c (1024)	Conv19 (softmax)	k (1 × 1)/c (2)
Conv10	k (3 × 3)/c (1024)