About the avg values in the fd_waterbird.py program

[jyapasan]

Thank you for your repo.

I have one question on your fd_waterbird.py program.
https://github.com/cvlab-columbia/CT4Recognition/blob/master/fd_waterbird.py#LL307C13-L307C162

I would like to know how you determined the number in line 307 of the program.