pnmenlarge(1) General Commands Manual pnmenlarge(1)NAME
pnmenlarge - read a portable anymap and enlarge it N times
SYNOPSIS
pnmenlarge N [pnmfile]
DESCRIPTION
Reads a portable anymap as input. Replicates its pixels N times, and produces a portable anymap as output.
pnmenlarge can only enlarge by integer factors. The slower but more general pnmscale can enlarge or reduce by arbitrary factors, and pbm-
reduce can reduce by integer factors, but only for bitmaps.
If you enlarge by a factor of 3 or more, you should probably add a pnmsmooth step; otherwise, you can see the original pixels in the
resulting image.
SEE ALSO pbmreduce(1), pnmscale(1), pnmsmooth(1), pnm(5)AUTHOR
Copyright (C) 1989 by Jef Poskanzer.
26 February 1989 pnmenlarge(1)
Check Out this Related Man Page
fstopgm(1) General Commands Manual 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 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.
06 April 89 fstopgm(1)
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