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 back- ground 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 ⟨index.html#commonoptions⟩ ), pnmalias 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 ⟨libnetpbm_image.html#colorname⟩ . Note that even when dealing with PGMs, background and foreground colors need to be specified in the fashion described above. In this case, pn- malias 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 back- ground pixels. -falias says to apply anti-aliasing to all pixels surrounding fore- ground 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 Ob- servatory. 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)
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