What do you mean by reversed Danielsson function? You can probably get what you want either using math or inverting the image before using the function.
Your skeleton function might work better after applying Erode a few times to get rid of the bumps.
Circle detection doesn't fit the demands, it draws circles where ever it can,
but I need to know the diameter at every point so I can make a table how
many procent falls in a certainly range. (yes the demands have changed)
Even If the veins become bigger you can always equate it to the original size right? The size is always going to be proportional isnt it? Correct me if otherwise.
