Planar Subdivision in CSharp

From Emgu CV: OpenCV in .NET (C#, VB, C++ and more)
Revision as of 18:57, 20 August 2009 by Emgucv (talk | contribs)
Jump to navigation Jump to search

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>
      static void Main()

      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);

         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
                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");