NAME

       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.

                                         10 January 1991                             ppmtorgb3(1)