/// <summary>
/// shows the detected centre square
/// </summary>
/// <param name="filename">raw image filename</param>
/// <param name="square">square to be displayed</param>
/// <param name="output_filename">filename to save as</param>
private static void ShowSquare(string filename, polygon2D square,
string output_filename)
{
Bitmap bmp = (Bitmap)Bitmap.FromFile(filename);
byte[] img = new byte[bmp.Width * bmp.Height * 3];
BitmapArrayConversions.updatebitmap(bmp, img);
square.show(img, bmp.Width, bmp.Height, 0, 255, 0, 0);
Bitmap output_bmp = new Bitmap(bmp.Width, bmp.Height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
BitmapArrayConversions.updatebitmap_unsafe(img, output_bmp);
if (output_filename.ToLower().EndsWith("jpg"))
output_bmp.Save(output_filename, System.Drawing.Imaging.ImageFormat.Jpeg);
if (output_filename.ToLower().EndsWith("bmp"))
output_bmp.Save(output_filename, System.Drawing.Imaging.ImageFormat.Bmp);
}
