I am trying to measure the droplets on the grooves in this surface, but I am unsure as to how to go about it as the background is not uniform. The droplets of interest are the ones in focus in the three lines. I am interested in their size and circularity. Normally when analysing a metal surface that is uniform I would just convert to a mask and use the particle analyser tool. This has not worked well on this image. Are there any other ways to analyse the droplets, or (preferentially) a method to prepare the image for the particle analyser?
Any help would be appreciated, thanks