I'm not sure I understand the use of least squares here.
Why not use a Hough transform with each drawn point voting for a center, then average the radius?
It's not a critic - just me wondering why.
Why not use a Hough transform with each drawn point voting for a center, then average the radius?
It's not a critic - just me wondering why.
https://projecteuclid.org/euclid.ejs/1251119958
I believe this website is using what the paper calls the geometric fit, which is considered one of the better methods, but the paper develops an even better method.
(I had to use this, strangely, in a physics lab course. I was measuring the Zeeman effect by looking at the diameter of rings of light projected by an interferometer; I took webcam images of the ring and used the algorithm to fit circles to the ring and hence measure its diameter.)