private static void TestDrawContours()
{
CVImage image = new CVImage(100, 100, CVDepth.Depth8U, 1);
image.DrawRectangle(new System.Drawing.Rectangle(10, 10, 20, 30), System.Drawing.Color.Red, 3);
new BitmapViewer(image.ToBitmap()).ShowDialog();
CVImage res = image.DrawContours();
new BitmapViewer(res.ToBitmap()).ShowDialog();
}