Greetings all,

I have the attached image and I need to find an automatic way to get the coordinates of all circles that belongs to the first circle (inner). For that I used Python. I already have all the coordinates, I just need to find a way to know which one belongs to the first circle and which one is outside. I tried contour, radial profile, euclidean distance but I couldn’t make it work because it is not a perfect circle… Can you suggest me something? Someone told me to try here in the ImageJ forum, I never used such tool.

Image original and the first circle highlighted.

PS: the size of the circle and the number of coordinates (red dots) changes over time.

Thanks.