fit a circle to a cloud of points
Hi, how to fit a circle with a cloud of points which can only represent a quarter of the circle ? Thank you
This forum is disabled, please visit https://forum.opencv.org
RANSAC could be the solution. Each triplet of points(random selected 3 points from cloud). Made a prediction of the circle. Then check if this prediction is good for you(e.g. check how many points lay in some tolerance from this circle{arc} ) https://en.wikipedia.org/wiki/Random_...
When you have a prediction. Use cv::fitEllipse https://docs.opencv.org/2.4/modules/i...
Or DownHillSolver to fit it. https://docs.opencv.org/3.4/d4/d43/cl...
Find the centre, then find the most distant point from that centre. Voila, you have your centre point and radius.