private static long[,] create(byte[,] img, PixelFormat format)
{
long[,] actual8bpp;
Bitmap image;
MatrixToImage converter = new MatrixToImage();
converter.Format = format;
converter.Convert(img, out image);
Assert.AreEqual(format, image.PixelFormat);
IntegralImage2 ii8bpp = IntegralImage2.FromBitmap(image, 0);
actual8bpp = ii8bpp.Image;
return actual8bpp;
}