void ShowGBBadPosition()
        {
            if (bl.Count < 2)
            {
                return;
            }
            List <PixInfor> pl = new List <PixInfor>();

            if (JBBadPixList.Count > 3000)
            {
                pl = JBBadPixList.GetRange(0, 3000);
            }
            else
            {
                pl = JBBadPixList;
            }
            if (BadPixList != null)
            {
                dg.DrawPixPosition(pl, bl[0].PixelWidth, bl[0].PixelHeight);
            }
        }