pamenlarge




                                  pamenlarge

   Updated: 26 September 2004
   Table Of Contents

NAME

   pamenlarge - Enlarge a Netpbm image N times

SYNOPSIS

   pamenlarge N [pnmfile]

DESCRIPTION

   This program is part of Netpbm.

   pamenlarge  reads a Netpbm image as input, replicates its pix-
els N times, and
   produces a Netpbm image as output. The output is the same type
of image as
   the input.

   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  re-
sulting image.

   pamenlarge can enlarge only by integer factors. The slower but
more general
   pamscale can enlarge or reduce by arbitrary factors.  pamscale
allows you to
   enlarge  by resampling, which gives you smoother enlargements.
But it is much
   slower.

   pamstretch is another enlarging program that enlarges by inte-
ger factors. It
   does a simple kind of resampling that gives you a smoothed en-
largement with
   less computational cost.

   pbmreduce can reduce by integer factors, but only for PBM  im-
ages.

HISTORY

   pamenlarge  was  new in Netpbm 10.25 (October 2004). It is de-
signed as a
   replacement for pnmenlarge by Jef Poskanzer, which was in Pbm-
plus as far
   back  as 1989. The major difference is that pamenlarge can en-
large PAM format
   images in addition to PNM.

SEE ALSO

   pbmreduce, pamscale, pamstretch, pnmsmooth, pnm

AUTHOR

   Copyright (C) 1989 by Jef Poskanzer.
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