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G3TOPBM.MAN
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1991-08-11
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g3topbm(1) Unix Programmer's Manual g3topbm(1)
NNNAAAMMMEEE
g3topbm - convert a Group 3 FAX file into a portable bitmap
SSSYYYNNNOOOPPPSSSIIISSS
ggg333tttooopppbbbmmm [-kkkllluuudddgggeee] [-rrreeevvveeerrrssseeebbbiiitttsss] [-ssstttrrreeetttccchhh] [_g_3_f_i_l_e]
DDDEEESSSCCCRRRIIIPPPTTTIIIOOONNN
Reads a Group 3 FAX file as input. Produces a portable bitmap as output.
OOOPPPTTTIIIOOONNNSSS
---kkkllluuudddgggeee
Tells _g_3_t_o_p_b_m to ignore the first few lines of the file; sometimes
FAX files have some junk at the beginning.
---rrreeevvveeerrrssseeebbbiiitttsss
Tells _g_3_t_o_p_b_m 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.
---ssstttrrreeetttccchhh
Tells _g_3_t_o_p_b_m 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.
RRREEEFFFEEERRREEENNNCCCEEESSS
The standard for Group 3 FAX is defined in CCITT Recommendation T.4.
SSSEEEEEE AAALLLSSSOOO
pbmtog3(1), pbm(5)
AAAUUUTTTHHHOOORRR
Copyright (C) 1989 by Paul Haeberli <paul@manray.sgi.com>.
02 October 1989 1