Hi @ crackwitz
and thanks for response!
No, it is not pipes, in fact, the only interesting thing (region of interest) is the middle part of the picture (left from the vertical black line, as far as the horizonal band extends). And it’s a flat surface.
I wonder if your idea can be applied to that scenario as well? Can you elaborate in more detail?
What do you mean by
“integrate (vertically) … for an estimate of the “background”
and
“integrate (horizontally) … to find the faint signal”
Any help would mean a lot to me…