more sanity checks (BG folder) #9

• document the purpose of the BG mask file

-> documented in the commit bd6ecb3 .

• add a code that tests that BG and FG/TRA masks are not overlapping

-> from its early days, there is a log

[INFO] BG&FG overlapping voxels: ....some number...

which essentially does exactly that.

• consider if there is a way to compute BG automatically from --> e.g. consistent (morphologically opened?) are of pixels that never part of any FG/TRA masks/marker

-> a BGmask creator that can also function as described has been added in commit 43ce09f

• add "whole embryo detector"