Question about color map calculation

[lyy-zz]

Thank you for posting the code of the paper.
I have some doubts about the color map and would like to consult, as follows:
Figure 1
Figure 2
Q1 Is it possible to repeat torch.cat in 1 and 3 in Figure 1 ?
Q2 What is the effect of calculating the input exponent to get raw_low_input , 2 in Figure 1 ?
Q3 Does mean_c(x) in the paper correspond to x.sum in the code? example Figure 2