uThreshold

The tolerance value of each segment. Valid values for this parameter are: 0 to 255 for 1, 2, 3, 4, 5, 6, 7, 8, 24, and 32-bit bitmaps, 0 to 4095 for 12-bit bitmaps and 0 to 65535 for 16, 48, and 64-bit bitmaps.