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. 2022 Nov 11;12(11):2765. doi: 10.3390/diagnostics12112765

Figure 3.

Figure 3

U-Net, derived from FCN. The result from the FCN experiment shows that the inference will be more precise if the same level feature before downsampling is summed before the feature goes into upsampling. U-Net applies concatenation instead of summation; however, the summation is also used in some research.