ppmtorgb3 - separate a portable pixmap into three portable
       graymaps


SYNOPSIS

       ppmtorgb3 [ppmfile]


DESCRIPTION

       Reads a portable pixmap as input.  Writes  three  portable
       graymaps as output, one each for red, green, and blue.

       The  output  filenames are constructed by taking the input
       filename,  stripping  off  any  extension,  and  appending
       ".red",  ".grn",  and  ".blu".   For  example,  separating
       lenna.ppm  would  result  in  lenna.red,  lenna.grn,   and
       lenna.blu.   If  the input comes from stdin, the names are
       noname.red, noname.grn, and noname.blu.


SEE ALSO

       rgb3toppm(1), ppmtopgm(1), pgmtoppm(1), ppm(5), pgm(5)


AUTHOR

       Copyright (C) 1991 by Jef Poskanzer.


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