NAME

       ppmcolors - generate a color map of all colors of a certain maxval

SYNOPSIS

       ppmcolors [-maxval=maxval]

       All  options  can be abbreviated to their shortest unique prefix.  You may use two hyphens
       instead of one to designate an option.  You may use either white space or an  equals  sign
       between an option name and its value.

DESCRIPTION

       ppmcolors generates a PPM color map containing all the colors representable with a certain
       maxval.

       A PPM color map is a regular PPM image that is used by some programs to define  a  set  of
       colors.

       ppmcolors  generates  a  one  row  PPM  image  that  contains  one  pixel  of  each  color
       representable by the maxval you choose.  The maxval of the PPM image is that maxval.  Note
       that you can change the maxval of the color map by running the output of ppmcolors through
       pnmdepth.  As long as the new maxval is a multiple of the original, the resulting  set  of
       colors  will  be  identical.   If  the  new maxval is not a multiple, the resulting set of
       colors will be slightly different.

       When you select a maxval of 5 (which is the default), you get a color map of  the  set  of
       "web  safe"  colors  as  defined  by  Netscape.  Most web browsers guarantee that they can
       produce at least these 216 colors (215 plus black).

       pnmcolormap is another program to generate a color  map.   It  chooses  a  set  of  colors
       designed to represent the colors in a specified image (or simply the set of all the colors
       in that image, if you choose).

       pgmramp performs a similar function for PGM images.

OPTIONS

       -maxval=maxval
              This is the maxval of the generated color map.  Default is 5.

SEE ALSO

       pnmdepth(1), pnmcolormap(1), ppmcie(1), ppmrainbow(1), pgmramp(1), ppm(5)

AUTHOR

       By Bryan Henderson, December 2001.

                                         20 December 2001                            ppmcolors(1)