NAME¶
g3topbm - convert a Group 3 fax file into a portable bitmap
SYNOPSIS¶
g3topbm [
-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 prefix.
REFERENCES¶
The standard for Group 3 fax is defined in CCITT Recommendation T.4.
BUGS¶
Probably.
SEE ALSO¶
pbmtog3(1),
pbm(5)
AUTHOR¶
Copyright (C) 1989 by Paul Haeberli <paul@manray.sgi.com>.