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ppmchange(1)					 ppmchange(1)

NAME
       ppmchange - change all pixels of one color to another in a
       portable pixmap

SYNOPSIS
       ppmchange oldcolor newcolor [...]  [ppmfile]

DESCRIPTION
       Reads a portable pixmap as input.  Changes all  pixels  of
       oldcolor to newcolor, leaving all others unchanged.  Up to
       256 colors may be replaced by specifying couples of colors
       on the command line.

       The colors can be specified in five ways:

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

       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  hex-
	      adecimal	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.)

SEE ALSO
       pgmtoppm(1), ppm(5)

AUTHOR
       Wilson H. Bent. Jr. (whb@usc.edu)  with	modifications  by
       Alberto Accomazzi (alberto@cfa.harvard.edu)

			 3 December 1993			1

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