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fstopgm
!!!fstopgm
NAME
SYNOPSIS
DESCRIPTION
SEE ALSO
AUTHOR
----
!!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
This will tell you whether you need to use ''pnmscale.'' Then use one of the following pipelines:


  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
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.
!!SEE ALSO


pgmtofs(1), pgm(5), pgmnorm(1), pnmenlarge(1), pnmscale(1),
pgmtopbm(1)
!!AUTHOR


Copyright (C) 1989 by Jef Poskanzer.
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Last edited on Monday, June 3, 2002 6:50:14 pm by "perry"

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