Detecting Circles without using Hough Circles

Question

I have an image of a circle, I want to find the circle but not using hough circles.

I found a way, linked here.

But I can\'t find the transition coordinates fro

Answer 1

Another approach (that is useful for more than just circles) would be to find the image contours and do image moment analysis on the circle to find it's centre of mass:

I recommend learning them if you'e going to move forward with image processing. They're pretty helpful approaches that transform images into more useful structures.