Manual: pnmalias

Pnmalias User Manual(1)				   General Commands Manual			     Pnmalias User Manual(1)

NAME
       pnmalias - antialias a PNM image

SYNOPSIS
       pnmalias

       [-bgcolor color]

       [-fgcolor color]

       [-bonly]

       [-fonly]

       [-balias]

       [-falias]

       [-weight w]

       [pnmfile]

DESCRIPTION
       This program is part of Netpbm(1).

       pnmalias	 reads	a  PNM	image as input, and applies anti-aliasing to background and foreground pixels.	If the input
       file is a PBM, pnmalias promotes the output anti-aliased image to a PGM, and prints a message informing the  user  of
       the change in format.

OPTIONS
       In addition to the options common to all programs based on libnetpbm (most notably -quiet, see  Common Options ), pn‐
       malias recognizes the following command line options:

       -bgcolor colorb sets the background color the colorb.

       -fgcolor colorf sets the foreground color to colorf.

       Pixels  with  these  values  will  be anti-aliased.  By default, pnmalias takes the background color to be black, and
       foreground color to be white.

       Specify the color (color) as described for the argument of the pnm_parsecolor() library routine .

       Note that even when dealing with PGMs, background and foreground colors need to be specified in the fashion described
       above.  In this case, pnmalias takes the background and foreground pixel values to be the value of the red  component
       for the specified color.

       -bonly says to apply anti-aliasing only to the background pixels.

       -fonly says to apply anti-aliasing only to the foreground pixels.

       -balias says to apply anti-aliasing to all pixels surrounding background pixels.

       -falias says to apply anti-aliasing to all pixels surrounding foreground pixels.

       If  you	specify	 neither  -balias  nor -falias, pnmalias applies anti-aliasing only among neighboring background and
       foreground pixels.

       -weight w says to use w as the central weight for the aliasing filter.  w must be a real number in the range 0 < w  <
       1.  The lower the value of w is, the "blurrier" the output image is.  The default is w = 1/3.

SEE ALSO
       pbmtext(1), pnmsmooth(1), pnm(1)

AUTHOR
       Copyright (C) 1992 by Alberto Accomazzi, Smithsonian Astrophysical Observatory.

DOCUMENT SOURCE
       This manual page was generated by the Netpbm tool 'makeman' from HTML source.  The master documentation is at

	      http://netpbm.sourceforge.net/doc/pnmalias.html

netpbm documentation					15 March 2004				     Pnmalias User Manual(1)