Rank: 1809 based on 82 downloads (last 30 days) and 8 files submitted
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Hui Ma

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University of Alabama at Birmingham

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06 Jul 2011 Fitting a conic to a given set of points using Trust Region method Conic fit using algebraic parameters based on Trust Region minimization scheme. Author: Hui Ma conic, conic fitting, orthogonal distances, least squares, algebraic parameters, trust region 6 0
06 Jul 2011 Fitting a conic to a given set of points using Levenberg-Marquardt method Conic fit using algebraic parameters based on Levenberg-Marquardt minimization scheme. Author: Hui Ma conic, conic fitting, orthogonal distances, least squares, algebraic parameters, levenbergmarquardt 14 0
06 Jul 2011 Fitting an ellipse to a given set of points using Trust Region method Ellipse fit using geometric parameters based on Trust Region minimization scheme. Author: Hui Ma ellipse, ellipse fitting, orthogonal distances, least squares, trust region, image processing 14 0
06 Jul 2011 Fitting an ellipse to a given set of points Ellipse fits using geometric parameters based on Levenberg-Marquardt minimization scheme. Author: Hui Ma ellipse, ellipse fitting, orthogonal distances, least squares, levenbergmarquardt, image processing 14 0
06 Jul 2011 Conversion of conics parameters Converting between algebraic parameters and geometric parameters of conics Author: Hui Ma conics, parameters 8 0
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21 Jun 2011 Ellipsoid fit Fits an ellipsoid to data using linear least squares. Author: Yury

I have a question: we can find the center, the radii of the ellipsoid and also the 3*3 direction matrix "evecs" using this program. Then how do you determine the three rotation angles using "evecs"?
Thanks for your help!

21 Jun 2011 Ellipsoid fit Fits an ellipsoid to data using linear least squares. Author: Yury

I am sorry, I meant how do you determine three rotation angles using "evecs" then?

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28 Jan 2012 Distance from points to an ellipse Projects a set of points onto an ellipse and returns the nearest corresponding points on the ellipse Author: Hui Ma Aleksey

Minor bug in the code. When handling circle case then Axis is treated as diameter and when handling ellipse case then Axis is treated as [Major Minor]/2.

28 Jan 2012 Distance from points to an ellipse Projects a set of points onto an ellipse and returns the nearest corresponding points on the ellipse Author: Hui Ma Aleksey

13 Jul 2010 Distance from points to an ellipse Projects a set of points onto an ellipse and returns the nearest corresponding points on the ellipse Author: Hui Ma Raquel

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