.TH g3topbm 1 "02 October 1989" .SH NAME g3topbm - convert a Group 3 FAX file into a portable bitmap .SH SYNOPSIS g3topbm [-kludge][-reversebits][-stretch] [g3file] .SH DESCRIPTION Reads a Group 3 FAX file as input. Produces a portable bitmap as output. .PP The -kludge flag tells g3topbm to ignore the first few lines of the file; sometimes FAX files have some junk at the beginning. .PP The -reversebits flag 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. .PP The -stretch flag tells g3topbm to stretch the image vertically by duplicating each row. This is for the low-quality transmission mode. .PP All flags can be abbreviated to their shortest unique prefix. .SH REFERENCES The standard for Group 3 FAX is defined in CCITT Recommendation T.4. .SH "SEE ALSO" pbmtog3(1), pbm(5) .SH AUTHOR Copyright (C) 1989 by Paul Haeberli . Permission to use, copy, modify, and distribute this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. This software is provided "as is" without express or implied warranty.