java circle recognition from an arraylist of points

Question

I currently have an arraylist of points from a freehand drawing on a canvas. I was wondering if there is a simple algorithm to detect if that shape represents a circle.I hav

Answer 1

Maybe this answer can give you some ideas: https://stackoverflow.com/a/940041/12860

In short: calculate the second derivative. If it is quite constand, it is probably a circle.