I am trying to understand granulometry. I understand that it deals with determining the size distribution of particles in an image and uses the principles of opening and closing.
I have a smoothed image with marbles in different sizes and call it A and a structuring element B, which is a disk with variable radii. I get that when opening the image with the structuring element B, smaller marbles disappear and by increasing the radius of B, bigger marbles start to disappear.
What I do not understand is what will happen if I use closing instead of opening. Do the bigger marbles disappear with a smaller radius B? So, does the exact opposite happen with closing?