fstopgm(1) - man - phpman

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Convert a Usenix FaceSaver file into a PGM image.

Convert the specified Usenix FaceSaver file into a PGM image
fstopgm {{path/to/input.fs}} > {{path/to/output.pgm}}

fstopgm(1)                             General Commands Manual                            fstopgm(1)



NAME
       fstopgm - convert a Usenix FaceSaver(tm) file into a portable graymap

SYNOPSIS
       fstopgm [fsfile]

DESCRIPTION
       Reads a Usenix FaceSaver(tm) file as input.  Produces a portable graymap 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 pnmscale 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 pnmscale.  Then use one of the following pipe‐
       lines:
         fstopgm | pgmnorm
         fstopgm | pnmscale -whatever | pgmnorm
       To go to PBM, you want something more like one of these:
         fstopgm | pnmenlarge 3 | pgmnorm | pgmtopbm
         fstopgm | pnmenlarge 3 | pnmscale <whatever> | pgmnorm | pgmtopbm
       You want to enlarge when going to a bitmap because otherwise you lose  information;  but  en‐
       larging by more than 3 does not look good.

       FaceSaver is a registered trademark of Metron Computerware Ltd. of Oakland, CA.

SEE ALSO
       pgmtofs(1), pgm(5), pgmnorm(1), pnmenlarge(1), pnmscale(1), pgmtopbm(1)

AUTHOR
       Copyright (C) 1989 by Jef Poskanzer.



                                             06 April 89                                  fstopgm(1)