pattern recognition of circles in images Topic is solved

[mael15]

I need an initial push in the right direction.
My goal is to achieve some sort of image pattern analysis for circles in an image. I have attached two examples, I want to extract the small circles, maybe even the lines in the black & white image that stand for a plane full of circles.
Is there a library I can use?
Thank you!

[doublemax]

https://docs.opencv.org/3.4/d4/d70/tuto ... ircle.html