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RedHat 9 (Linux i386) - man page for pnmenlarge (redhat section 1)

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)