public ImageFilter(Bitmap Img)
 {
     if (Img.PixelFormat != System.Drawing.Imaging.PixelFormat.Format24bppRgb && Img.PixelFormat != System.Drawing.Imaging.PixelFormat.Format32bppArgb)
     {
         this.Img = ImageArithmetic.toGray(Img);
     }
     else
     {
         this.Img = Img;
     }
 }