//Função que encontra os digitos
        private void digitosToolStripMenuItem_Click(object sender, EventArgs e)
        {
            if (img == null) // verify if the image is already opened
            {
                return;
            }
            Cursor = Cursors.WaitCursor; // clock cursor

            //copy Undo Image
            imgUndo = img.Copy();

            MIplImage s = imgUndo.MIplImage;

            //char "r";

            ImageClass.Digits(img);
            String b = ImageClass.EvaluateCompNumber();

            //Console.WriteLine(b);

            ImageViewer.Image = img.Bitmap;
            ImageViewer.Refresh();    // refresh image on the screen

            Cursor = Cursors.Default; // normal cursor
        }