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 hexadecimal num-
              ber: #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 Acco-
       mazzi (alberto@cfa.harvard.edu)

                                3 December 1993                   ppmchange(1)