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pnmalias(1)									      pnmalias(1)

       pnmalias - antialias a portable anyumap.

       pnmalias  [-bgcolor color] [-fgcolor color] [-bonly] [-fonly] [-balias] [-falias] [-weight
       w] [pnmfile]

       Reads a portable anymap as input, and applies anti-aliasing to background  and  foreground
       pixels.	If the input file is a portable bitmap, the output anti-aliased image is promoted
       to a graymap, and a message is printed informing the user of the change in format.

       -bgcolor colorb, -fgcolor colorf
	      set the background color to colorb, and the foreground to color to colorf.   Pixels
	      with  these  values will be anti-aliased. by default, the background color is taken
	      to be black, and foreground color is assumed to be white.  The colors can be speci-
	      fied in five ways:

	      o    A  name, assuming that a pointer to an X11-style color names file was compiled

	      o    An X11-style hexadecimal specifier: rgb:r/g/b, where r g and b are each 1-  to
		   4-digit hexadecimal numbers.

	      o    An X11-style decimal specifier: rgbi:r/g/b, where r g and b are floating point
		   numbers between 0 and 1.

	      o    For	backwards  compatibility,  an  old-X11-style  hexadecimal  number:  #rgb,
		   #rrggbb, #rrrgggbbb, or #rrrrggggbbbb.

	      o    For	backwards compatibility, a triplet of numbers separated by commas: r,g,b,
		   where r g and b are floating point numbers between 0 and 1.	(This  style  was
		   added before MIT came up with the similar rgbi style.)

	      Note that even when dealing with graymaps, background and foreground colors need to
	      be specified in the fashion described above.  In this case,  background  and  fore-
	      ground  pixel  values  are taken to be the value of the red component for the given

       -bonly, -fonly
	      Apply anti-aliasing only to background (-bonly), or foreground (-fonly) pixels.

       -balias, -falias
	      Apply anti-aliasing to all pixels surrounding background (-balias),  or  foreground
	      (-falias)  pixels.   By  default,  anti-aliasing takes place only among neighboring
	      background and foreground pixels.

       -weight w
	      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.

       pbmtext(1), pnmsmooth(1), pnm(5)

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

					  30 April 1992 			      pnmalias(1)
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