fstopgm man page on IRIX

fstopgm man page on IRIX

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fstopgm(1)					       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 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  other
       wise  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),  pnm
       scale(1), pgmtopbm(1)

AUTHOR
       Copyright (C) 1989 by Jef Poskanzer.

			   06 April 89		       fstopgm(1)

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