GNU/Linux man pages
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GNU/Linux |
CentOS 4.8 |
i386 |
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fstopgm(1) |
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fstopgm - convert a Usenix FaceSaver(tm) file into a PGM image
fstopgm [fsfile]
This program is part of Netpbm(1).
fstopgm reads a Usenix FaceSaver(tm) file as input and produces a PGM image as output.
FaceSaver(tm) files sometimes have rectangular pixels. While fstopgm won’t re-scale them into square pixels for you, it will give you the precise pamscale command that will do the job. Because of this, reading a FaceSaver(tm) image is a two-step process. First you do:
fstopgm > /dev/null
This will tell you whether you need to use pamscale.
Then use one of
the following pipelines:
fstopgm | pgmnorm
fstopgm | pamscale -whatever | pgmnorm
To go to PBM,
you want something more like one of these:
fstopgm | pamenlarge 3 | pgmnorm | pamditherbw
fstopgm | pamenlarge 3 | pamscale <whatever> | pgmnorm
| pamditherbw
You want to enlarge when going to a bitmap because otherwise you lose information; but enlarging by more than 3 does not look good.
FaceSaver is a registered trademark of Metron Computerware Ltd. of Oakland, CA.
pgmtofs(1), pgm(1), pgmnorm(1), pamenlarge(1), pamscale(1), pamditherbw(1)
Copyright (C) 1989 by Jef Poskanzer.
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fstopgm(1) | |