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Path: Math/Geometry
% Fit an ellipse.
The coefficients are:
a(1)*x^2 + a(2)*x*y + a(3)*y^2 + a(4)*x + a(5)* y + a(6) = 0;
Type FitEllipse for a demo.
Since version 2014.1
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Form:
[a, err] = FitEllipse( x, y )
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Inputs
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x (:,1) x values
y (:,1) y values
solnMethod (1,1) Solution method. 1=constrained, 2=unconstrained
Default is 1, constrained. Calls "eig".
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Outputs
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a (6,1) Coefficients
err (1,1) Fit error
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Reference: Fitzgibbon, A. Pilu, M. and Fisher, R. B., "Direct Least
Squares Fitting of Ellipses,"Pattern Analysis and Machine
Intelligence, Vol. 21, No. 5, May 1999.
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Common: Graphics/Plot2D Math: Linear/Mag
Back to the Math Module page