Fstopgm User Manual(0) Fstopgm User Manual(0)

NAME fstopgm - convert a Usenix FaceSaver(tm) file into a PGM image

SYNOPSIS fstopgm [fsfile]

DESCRIPTION This program is part of Netpbm(1).

fstopgm reads a Usenix FaceSaver(tm) file as input and produces a PGM image 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 pamscale command that will do the job. Because of this, read- ing a FaceSaver(tm) image is a two-step process. First you do:

fstopgm > /dev/null

This will tell you whether you need to use pamscale.

Then use one of the following pipelines: fstopgm | pgmnorm fstopgm | pamscale -whatever | pgmnorm

To go to PBM, you want something more like one of these: fstopgm | pamenlarge 3 | pgmnorm | pamditherbw fstopgm | pamenlarge 3 | pamscale <whatever> | pgmnorm | pamditherbw

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 Oak- land, CA.

SEE ALSO pgmtofs(1), pgm(1), pgmnorm(1), pamenlarge(1), pamscale(1), pamditherbw(1)

AUTHOR Copyright (C) 1989 by Jef Poskanzer.

netpbm documentation 06 April 89 Fstopgm User Manual(0)