More details are given in:

- X. Zhang and P.L. Rosin, "Superellipse fitting to partial data", Pattern Recognition, vol. 36, no. 3, pp. 743-752, 2003
- P.L. Rosin, "Fitting superellipses", IEEE Trans. Pattern Analysis and Machine Intelligence, vol. 22, no. 7, pp. 726-732, 2000.
- P.L. Rosin, "Further five-point fit ellipse fitting", Graphical Models and Image Processing, vol. 61, no. 5, pp. 245-259, 1999.
- P.L. Rosin, "A note on the least squares fitting of ellipses", Pattern Recognition Letters, vol. 14, pp. 799-808, 1993.
- P.L. Rosin, "Ellipse fitting using orthogonal hyperbolae and Stirling's oval", Graphical Models and Image Processing, vol. 60, no. 3, pp. 209-213, 1998.
- P.L. Rosin, "Ellipse fitting by accumulating five-point fits", Pattern Recognition Letters, vol. 14, pp. 661-669, 1993.

You can download
code
to implement several **ellipse** fitting methods
as well as
code
to implement several **superellipse** fitting methods.

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