public static Polygon ToPolygon(this AForge.Imaging.Blob blob, AForge.Imaging.BlobCounterBase counter, AForge.Math.Geometry.IConvexHullAlgorithm hullAlgorithm)
{
List<AForge.IntPoint> leftPoints, rightPoints, edgePoints;
counter.GetBlobsLeftAndRightEdges(blob, out leftPoints, out rightPoints);
edgePoints = leftPoints.Union(rightPoints).ToList();
var hull = hullAlgorithm.FindHull(edgePoints);
// blob's convex hull
return new Polygon(blob.Rectangle, from point in hull select point.ToPoint(),
new System.Drawing.Point((int)(blob.CenterOfGravity.X),
(int)(blob.CenterOfGravity.Y)));
}
