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)