Ellipse Fitting in CSharp

From Emgu CV: OpenCV in .NET (C#, VB, C++ and more)
Revision as of 06:05, 24 November 2010 by Breadwinka (talk | contribs) (Undo revision 995 by Inuxejiq (talk))
Jump to navigation Jump to search

System Requirement

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

Source Code

#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);
#endregion

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

#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);
#endregion

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

Result

EllipsefittingExample.png