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(5) , pgmnorm(1) , pamenlarge(1) , pamscale(1) , pamditherbw(1)


Copyright (C) 1989 by Jef Poskanzer.

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