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|Extension TIFF Tag T4Options|
TIFF Tag Reference
TIFF Tag T4Options
Options for Group 3 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 1 for 2-dimensional coding (otherwise 1-dimensional is assumed). For 2-D coding, if more than one
strip is specified, each strip must begin with a 1-dimensionally coded line. That is, RowsPerStrip should be a
multiple of Parameter K, as documented in the CCITT specification.
LibTiff defines these bits as follows:
GROUP3OPT_2DENCODING = 1;