g3topbm(1)g3topbm(1)NAMEg3topbm - convert a Group 3 fax file into a portable
bitmap
SYNOPSISg3topbm [-kludge] [-reversebits] [-stretch] [g3file]
DESCRIPTION
Reads a Group 3 fax file as input. Produces a portable
bitmap as output.
OPTIONS-kludge
Tells g3topbm to ignore the first few lines of the
file; sometimes fax files have some junk at the
beginning.
-reversebits
Tells g3topbm to interpret bits least-significant
first, instead of the default most-significant
first. Apparently some fax modems do it one way
and others do it the other way. If you get a whole
bunch of "bad code word" messages, try using this
flag.
-stretch
Tells g3topbm to stretch the image vertically by
duplicating each row. This is for the low-quality
transmission mode.
All flags can be abbreviated to their shortest unique pre-
fix.
REFERENCES
The standard for Group 3 fax is defined in CCITT Recommen-
dation T.4.
BUGS
Probably.
SEE ALSOpbmtog3(1), pbm(5)AUTHOR
Copyright (C) 1989 by Paul Haeberli <paul@manray.sgi.com>.
02 October 1989 1