|Baseline TIFF Tag FillOrder|
TIFF Tag Reference
TIFF Tag FillOrder
The logical order of bits within a byte.
The specification defines these values:
1 = pixels with lower column values are stored in the higher-order bits of the byte.
The specification goes on to warn that FillOrder=2 should not be used in some cases to avoid ambigouty, and that support for FillOrder=2 is not required in Baseline TIFF compliant readers.
LibTiff defines these values:
FILLORDER_MSB2LSB = 1;
In practice, the use of FillOrder=2 is very uncommon, and is not recommended.