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- g3topbm(1) PBM Plus g3topbm(1)
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- NAME
- g3topbm - convert a Group 3 FAX file into a portable bitmap
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- SYNOPSIS
- g3topbm [-kludge][-reversebits][-stretch] [g3file]
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- DESCRIPTION
- Reads a Group 3 FAX file as input. Produces a portable bit-
- map as output.
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- The -kludge flag tells g3topbm to ignore the first few lines
- of the file; sometimes FAX files have some junk at the
- beginning.
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- 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.
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- The -stretch flag tells g3topbm to stretch the image verti-
- cally by duplicating each row. This is for the low-quality
- transmission mode.
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- All flags can be abbreviated to their shortest unique pre-
- fix.
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- REFERENCES
- The standard for Group 3 FAX is defined in CCITT Recommenda-
- tion T.4.
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- SEE ALSO
- pbmtog3(1), pbm(5)
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- AUTHOR
- Copyright (C) 1989 by Paul Haeberli <paul@manray.sgi.com>.
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- 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 docu-
- mentation. This software is provided "as is" without
- express or implied warranty.
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- Printed 5/25/90 02 October 1989 1
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