Algorithm of ellipse fitting in OpenCV -

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i read code of ellipse fitting in opencv, following link gives source code of ellipse fitting in opencv: http://lpaste.net/161378.

i want know details ellipse fitting in opencv, can not find documents of algorithm. in comments, said " new fitellipse algorithm, contributed dr. daniel weiss". can not find paper ellipse fitting of dr. daniel weiss.

i have questions of algorithm:

  1. why algorithm need re-fit. first fit parameters - e, , re-fit parameters - c center coordinates.
  2. ellipse need satisfy constraint of 4*a*b - c^2 > 0, how algorithm satisfy it?

i'm wondering myself since i've discovered algorithm bugged. see bug-report: https://github.com/itseez/opencv/issues/6544

i tried find relevant papers dr. daniel weiss , failed.


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