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fstopgm

Section: User Commands (1)
Updated: 06 April 89
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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 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 <whatever> | pgmnorm | pgmtopbm
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.


 

Index

NAME
SYNOPSIS
DESCRIPTION
SEE ALSO
AUTHOR




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