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I'm working on a computer vision program, and need advice on how to best fit a circle given 3 points from a possible one. The program randomly samples 3 vectors (2D points) from a model repeatedly until a good circle is found, using RANSAC.

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 What's a good circle? Are you sure a site like MathOverflow is the best place to ask programming questions? – Thierry Zell Sep 14 2011 at 4:43
I removed the elliptic-curve tag, but I'm still not happy with what is there. I would have thought a computer-vision tag... – David Roberts Sep 14 2011 at 5:14
I don't find the question well-posed enough to be answerable. – Greg Martin Sep 14 2011 at 5:50

closed as off topic by Will Jagy, David Roberts, Andres Caicedo, algori, Dan Petersen Sep 14 2011 at 6:28

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