pbmpscale Man page

pbmpscale General Commands Manual pbmpscale


pbmpscale – enlarge a portable bitmap with edge smoothing


pbmpscale N [ pbmfile ]


Reads a portable bitmap as input, and outputs a portable bitmap
enlarged N times. Enlargement is done by pixel replication, with some
additional smoothing of corners and edges.


pnmenlarge, ppmscale(1), pbm(5)


Copyright (C) 1990 by Angus Duggan Copyright (C) 1989 by Jef Poskanzer.

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted, pro‐
vided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in sup‐
porting documentation. This software is provided “as is” without
express or implied warranty.

pbmpscale works best for enlargements of 2. Enlargements greater than 2
should be done by as many enlargements of 2 as possible, followed by an
enlargement by the remaining factor.

12 Dec 1990 pbmpscale

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