|Extension TIFF Tag T6Options|
TIFF Tag Reference
TIFF Tag T6Options
Options for Group 4 Fax compression
This field is made up of a set of 32 flag bits. Unused bits must be set to 0. Bit 0 is the low-order bit.
The specification defines these bits:
Bit 0 is unused and always 0.
LibTiff defines the single significant bits as follows:
GROUP4OPT_UNCOMPRESSED = 2;
In earlier versions of TIFF, this tag was named Group4Options.
Readers should honor this option tag, and only this option tag, whenever Group 4 Fax encoding is specified for Compression.