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pbmpscale(1) [debian man page]

pbmpscale(1)						      General Commands Manual						      pbmpscale(1)

NAME
pbmpscale - enlarge a portable bitmap with edge smoothing SYNOPSIS
pbmpscale N [ pbmfile ] DESCRIPTION
Reads a portable bitmap as input, and outputs a portable bitmap enlarged N times. Enlargement is done by pixel replication, with some addi- tional smoothing of corners and edges. SEE ALSO
pnmenlarge(1), ppmscale(1), pbm(5) AUTHOR
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. NOTES
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(1)

Check Out this Related Man Page

pbmtopgm(1)                                                   General Commands Manual                                                  pbmtopgm(1)

NAME
pbmtopgm - convert portable bitmap to portable graymap by averaging areas SYNOPSIS
pbmtopgm width height [pbmfile] DESCRIPTION
pbmtopgm reads a portable bitmap as input. It outputs a portable graymap in which each pixel's gray level is the average the surrounding black and white input pixels. The surrounding area is a rectangle of width by height pixels. In other words, this is a convolution. pbmtopgm is similar to a special case of pnmconvol. You may need a ppmsmooth step after pbmtopgm. pbmtopgm has the effect of anti-aliasing bitmaps which contain distinct line features. pbmtopgm works best with odd sample width and heights. You don't need pbmtopgm just to use a PGM program on a PBM image. Any PGM program (assuming it uses the Netpbm libraries to read the PGM input) takes PBM input as if it were PGM, with only the mininum and maximum gray levels. So unless your convolution rectangle is bigger than one pixel, you're not gaining anything with a pbmtopgm step. SEE ALSO
netpbm(1), pgmtopbm(1), pbm(5) AUTHOR
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. 03 Sep 2001 pbmtopgm(1)
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