fstopgm



Fstopgm User Manual(0)                                  Fstopgm User Manual(0)




NAME

       fstopgm - convert a Usenix FaceSaver(tm) file into a PGM image




SYNOPSIS

       fstopgm [fsfile]



DESCRIPTION

       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,  read-
       ing 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 | pnmenlarge 3 | pgmnorm | pamditherbw
         fstopgm | pnmenlarge 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 Oak-
       land, CA.




SEE ALSO

       pgmtofs(1),    pgm(1),    pgmnorm(1),    pnmenlarge(1),    pamscale(1),
       pamditherbw(1)


AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.



netpbm documentation              06 April 89           Fstopgm User Manual(0)

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