pbmclean(1)pbmclean(1)NAMEpbmclean - flip isolated pixels in portable bitmap
SYNOPSISpbmclean [-minneighbors=N] [-black|-white] [pbmfile]
You can use the minimum unique abbreviation of the
options. You can use two hyphens instead of one. You can
separate an option name from its value with white space
instead of an equals sign.
Before December 2001, pbmclean accepted -N instead of
-minneighbors.
DESCRIPTIONpbmclean cleans up a PBM image of random specs. It reads
a PBM image as input and outputs a PBM that is the same as
the input except with every pixel which has less than N
identical neighbours inverted.
The default for N is 1 - only completely isolated pixels
are flipped.
(A value of N greater than 8 generates a completely
inverted image (but use pnminvert to do that) -- or a com
pletely white or completely black image with the -black or
-white option).
pbmclean considers the area beyond the edges of the image
to be white. (This matters when you consider pixels right
on the edge of the image).
You can use pbmclean to clean up "snow" on bitmap images.
OPTIONS-black
-white Flip pixels of the specified color. By default, if
you specify neither -black nor -white, pbmclean
flips both black and white pixels which do not have
sufficient identical neighbors. If you specify
-black, pbmclean leaves the white pixels alone and
just erases isolated black pixels. Vice versa for
-white. You may specify both -black and -white to
get the same as the default behavior.
SEE ALSOpbm(5)AUTHOR
Copyright (C) 1990 by Angus Duggan Copyright (C) 1989 by
Jef Poskanzer. Copyright (C) 2001 by Michael Sternberg.
Permission to use, copy, modify, and distribute this soft
ware and its documentation for any purpose and without fee
is hereby granted, provided that the above copyright
notice appear in all copies and that both that copyright
notice and this permission notice appear in supporting
documentation. This software is provided "as is" without
express or implied warranty.
18 Oct 2001 pbmclean(1)
