Particles morphology calculations

edit

Hi,

I'm a scientist and right now I have to automate the morphological description of sand grains. I want to compute those descriptors : - Circularity, according to Cox (Riley, 1941), that describes wether the grain is circular or elongated (easy to compute, no big deal here) - Roundness that describes if angles of sand grain are sharp or rounded.

I usually use imageJ for image analysis but its descriptor for roundness is shitty (4A/(Pi(major axis)^2)).

According to Wadell (1935) the roundness is the average radius of the corners divided by the inscribed circle's diameter.

I would like to use opencv to find corners positions and to find the matching circles.

I'm just an opencv beginner and i don't have weeks to spend on it. Do you think that's something I could easily implement in onpencv with only some hours of work ?

Here are some sand grains I shot (some parts are blurry since microscope depth of field is limited)

Thanks for your help guys

Julien