Ellipse Fitting in CSharp

From Emgu CV: OpenCV in .NET (C#, VB, C++ and more)
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System Requirement

Component Requirement Detail
Emgu CV Version 2.0.1.0 Available only from SVN
Operation System Cross Platform

Source Code

<source lang="csharp">

  1. region generate random points

System.Random r = new Random(); int sampleCount = 100; Ellipse modelEllipse = new Ellipse(new PointF(200, 200), new SizeF(150, 60), 30); PointF[] pts = PointCollection.GeneratePointCloud(modelEllipse, sampleCount);

  1. endregion

Stopwatch watch = Stopwatch.StartNew(); Ellipse fittedEllipse = PointCollection.EllipseLeastSquareFitting(pts); watch.Stop();

  1. region draw the points and the fitted ellipse

Image<Bgr, byte> img = new Image<Bgr, byte>(400, 400, new Bgr(Color.White)); foreach (PointF p in pts)

  img.Draw(new CircleF(p, 2), new Bgr(Color.Green), 1);

img.Draw(fittedEllipse, new Bgr(Color.Red), 2);

  1. endregion

ImageViewer.Show(img, String.Format("Time used: {0}milliseconds", watch.ElapsedMilliseconds));

</source>

Result

EllipsefittingExample.png