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pnmscale(1)							   pnmscale(1)

NAME
       pnmscale - scale a portable anymap

SYNOPSIS
       pnmscale s [pnmfile]
       pnmscale -xsize|-width|-ysize| -height s [pnmfile]
       pnmscale -xscale|-yscale s [pnmfile]
       pnmscale -xscale|-xsize|-width s -yscale|-ysize|-height s [pnmfile]
       pnmscale -xysize x y [pnmfile]
       pnmscale -pixels n [pnmfile]

DESCRIPTION
       Reads a portable anymap as input.  Scales it by the specified factor or
       factors and produces a portable anymap as output.  If the input file is
       in  color, the output will be too, otherwise it will be grayscale.  You
       can both enlarge (scale factor > 1) and reduce (scale factor < 1).

       You can specify one dimension as a pixel size, and the other  dimension
       will be scaled correspondingly.

       You  can specify one dimension as a scale, and the other dimension will
       not be scaled.

       You can specify different sizes or scales for each axis.

       You can use the special -xysize flag, which fits	 the  image  into  the
       specified size without changing the aspect ratio.

       Or,  you can use the -pixels flag, which fits the image into the speci‐
       fied number of pixels without changing the aspect ratio.

       All flags can be abbreviated to their shortest unique prefix.

       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), pnmenlarge(1), pnmsmooth(1), pnm(5)

AUTHOR
       Copyright (C) 1989, 1991 by Jef Poskanzer.

				12 January 1991			   pnmscale(1)

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