Difference between revisions of "Minimum Area Rectangle in CSharp"
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(Updated sample code to Emgu CV v4.4) |
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| Line 1: | Line 1: | ||
== System Requirement == | == System Requirement == | ||
{| style="text-align:center" border="1px" cellpadding="10" cellspacing="0" | {| style="text-align:center" border="1px" cellpadding="10" cellspacing="0" | ||
| − | !Component || Requirement | + | !Component || Requirement |
|- | |- | ||
| − | |Emgu CV || Version | + | |Emgu CV || Version 4.4.0 |
|- | |- | ||
| − | |Operation System || Cross Platform | + | |Operation System || Cross Platform |
|} | |} | ||
| Line 18: | Line 18: | ||
Stopwatch watch = Stopwatch.StartNew(); | Stopwatch watch = Stopwatch.StartNew(); | ||
| − | + | RotatedRect box = CvInvoke.MinAreaRect(pts); | |
watch.Stop(); | watch.Stop(); | ||
#region draw the points and the box | #region draw the points and the box | ||
| − | + | Mat img = new Mat(400, 400, DepthType.Cv8U, 3); | |
| − | + | img.SetTo(new MCvScalar(255, 255, 255)); | |
| + | |||
| + | Point[] vertices = Array.ConvertAll(box.GetVertices(), Point.Round); | ||
| + | |||
| + | CvInvoke.Polylines(img, vertices, true, new MCvScalar(0, 0, 255), 1); | ||
foreach (PointF p in pts) | foreach (PointF p in pts) | ||
| − | + | CvInvoke.Circle(img, Point.Round(p), 2, new MCvScalar(0, 255, 0), 1); | |
#endregion | #endregion | ||
| − | ImageViewer.Show(img, String.Format("Time used: {0} milliseconds", watch.ElapsedMilliseconds));</source> | + | Emgu.CV.UI.ImageViewer.Show(img, String.Format("Time used: {0} milliseconds", watch.ElapsedMilliseconds)); |
| + | </source> | ||
== Result == | == Result == | ||
[[image:MinimumAreaRectangleExample.png]] | [[image:MinimumAreaRectangleExample.png]] | ||
Latest revision as of 13:38, 22 October 2020
System Requirement
| Component | Requirement |
|---|---|
| Emgu CV | Version 4.4.0 |
| 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(90, 60), -60);
PointF[] pts = PointCollection.GeneratePointCloud(modelEllipse, sampleCount);
#endregion
Stopwatch watch = Stopwatch.StartNew();
RotatedRect box = CvInvoke.MinAreaRect(pts);
watch.Stop();
#region draw the points and the box
Mat img = new Mat(400, 400, DepthType.Cv8U, 3);
img.SetTo(new MCvScalar(255, 255, 255));
Point[] vertices = Array.ConvertAll(box.GetVertices(), Point.Round);
CvInvoke.Polylines(img, vertices, true, new MCvScalar(0, 0, 255), 1);
foreach (PointF p in pts)
CvInvoke.Circle(img, Point.Round(p), 2, new MCvScalar(0, 255, 0), 1);
#endregion
Emgu.CV.UI.ImageViewer.Show(img, String.Format("Time used: {0} milliseconds", watch.ElapsedMilliseconds));
Result
