fstopgm

Langue: en

Version: 260778 (debian - 07/07/09)

Section: 1 (Commandes utilisateur)

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.