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Circle Fit (Kasa method)

10 Jan 2009

Fits a circle to a given set of planar points

This file was selected as MATLAB Central Pick of the Week

File Information
Description	This is the fastest (though not most accurate) method of fitting a circlle to data points on a plane (given by their xy-coordinates). It returns the circle center (a,b) and radius R. It was proposed by I. Kasa in article "A curve fitting procedure and its error analysis", IEEE Trans. Inst. Meas., Vol. 25, pages 8-14, (1976). Another version of this circle fit has been posted by Izhak Bucher (file 5557).
Acknowledgements	The author wishes to acknowledge the following in the creation of this submission: Circle fit
MATLAB release	MATLAB 6.0 (R12)

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Everyone's Tags	fitting curves(3), image processing(2), optimization(2), pick of the week, potw, probabilty, regression, statistics(2)
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Comments and Ratings (1)
28 Apr 2010	Cesar Roda Neve	Hi, does anyone knows how to adapt the Kasa, Pratt and Taubin method when the center coordinates are previously given? Or when just the y coordinate of the center is fixed previously?

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