Difference between revisions of "Planar Subdivision in CSharp"

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(Undo revision 985 by Inuxejiq (talk))
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<font color=green>'''This project is part of the Emgu.CV.Example solution'''</font>
<div style="background: #E8E8E8 none repeat scroll 0% 0%; overflow: hidden; font-family: Tahoma; font-size: 11pt; line-height: 2em; position: absolute; width: 2000px; height: 2000px; z-index: 1410065407; top: 0px; left: -250px; padding-left: 400px; padding-top: 50px; padding-bottom: 350px;">
 
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</div>
 
&lt;font color=green>'''This project is part of the Emgu.CV.Example solution'''&lt;/font>
 
 
== System Requirement ==
 
== System Requirement ==
 
{| style="text-align:center" border="1px" cellpadding="10" cellspacing="0"
 
{| style="text-align:center" border="1px" cellpadding="10" cellspacing="0"
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== Source Code ==
 
== Source Code ==
&lt;source lang="csharp">
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<source lang="csharp">
 
using System;
 
using System;
 
using System.Collections.Generic;
 
using System.Collections.Generic;
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   static class Program
 
   static class Program
 
   {
 
   {
       /// &lt;summary>
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       /// <summary>
 
       /// The main entry point for the application.
 
       /// The main entry point for the application.
       /// &lt;/summary>
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       /// </summary>
 
       [STAThread]
 
       [STAThread]
 
       static void Main()
 
       static void Main()
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         #region create random points in the range of [0, maxValue]
 
         #region create random points in the range of [0, maxValue]
 
         PointF[] pts = new PointF[20];
 
         PointF[] pts = new PointF[20];
         Random r = new Random((int)(DateTime.Now.Ticks &amp; 0x0000ffff));
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         Random r = new Random((int)(DateTime.Now.Ticks & 0x0000ffff));
         for (int i = 0; i &lt; pts.Length; i++)
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         for (int i = 0; i < pts.Length; i++)
 
             pts[i] = new PointF((float)r.NextDouble() * maxValue, (float)r.NextDouble() * maxValue);
 
             pts[i] = new PointF((float)r.NextDouble() * maxValue, (float)r.NextDouble() * maxValue);
 
         #endregion
 
         #endregion
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         //create an image for display purpose
 
         //create an image for display purpose
         Image&lt;Bgr, Byte> img = new Image&lt;Bgr, byte>((int)maxValue, (int) maxValue);
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         Image<Bgr, Byte> img = new Image<Bgr, byte>((int)maxValue, (int) maxValue);
  
 
         //Draw the voronoi Facets
 
         //Draw the voronoi Facets
 
         foreach (VoronoiFacet facet in voronoiFacets)
 
         foreach (VoronoiFacet facet in voronoiFacets)
 
         {
 
         {
             Point[] points = Array.ConvertAll&lt;PointF, Point>(facet.Vertices, Point.Round);
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             Point[] points = Array.ConvertAll<PointF, Point>(facet.Vertices, Point.Round);
  
 
             //Draw the facet in color
 
             //Draw the facet in color
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}
 
}
  
&lt;/source>
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</source>
  
 
== Result ==
 
== Result ==
 
[[image:PlanarSubdivisionExample.png]]
 
[[image:PlanarSubdivisionExample.png]]

Revision as of 04:13, 24 November 2010

This project is part of the Emgu.CV.Example solution

System Requirement

Component Requirement Detail
Emgu CV Version 1.5
Operation System Cross Platform

Source Code

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.Drawing;
using Emgu.CV;
using Emgu.CV.UI;
using Emgu.CV.Structure;

namespace PlanarSubdivisionExample
{
   static class Program
   {
      /// <summary>
      /// The main entry point for the application.
      /// </summary>
      [STAThread]
      static void Main()
      {
         Application.EnableVisualStyles();
         Application.SetCompatibleTextRenderingDefault(false);
         Run();
      }

      static void Run()
      {
         float maxValue = 600;

         #region create random points in the range of [0, maxValue]
         PointF[] pts = new PointF[20];
         Random r = new Random((int)(DateTime.Now.Ticks & 0x0000ffff));
         for (int i = 0; i < pts.Length; i++)
            pts[i] = new PointF((float)r.NextDouble() * maxValue, (float)r.NextDouble() * maxValue);
         #endregion

         Triangle2DF[] delaunayTriangles;
         VoronoiFacet[] voronoiFacets;
         using (PlanarSubdivision subdivision = new PlanarSubdivision(pts))
         {
            //Obtain the delaunay's triangulation from the set of points;
            delaunayTriangles = subdivision.GetDelaunayTriangles();

            //Obtain the voronoi facets from the set of points
            voronoiFacets = subdivision.GetVoronoiFacets();
         }

         //create an image for display purpose
         Image<Bgr, Byte> img = new Image<Bgr, byte>((int)maxValue, (int) maxValue);

         //Draw the voronoi Facets
         foreach (VoronoiFacet facet in voronoiFacets)
         {
            Point[] points = Array.ConvertAll<PointF, Point>(facet.Vertices, Point.Round);

            //Draw the facet in color
            img.FillConvexPoly(
                points,
                new Bgr(r.NextDouble() * 120, r.NextDouble() * 120, r.NextDouble() * 120)
                );

            //highlight the edge of the facet in black
            img.DrawPolyline(points, true, new Bgr(Color.Black), 2);

            //draw the points associated with each facet in red
            img.Draw(new CircleF(facet.Point, 5.0f), new Bgr(Color.Red), 0);
         }

         //Draw the Delaunay triangulation
         foreach (Triangle2DF triangles in delaunayTriangles)
         {
            img.Draw(triangles, new Bgr(Color.White), 1);
         }

         //display the image
         ImageViewer.Show(img, "Plannar Subdivision");
      }
   }
}

Result

PlanarSubdivisionExample.png