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.